/**
 * AcadNet Portal - Professional Stylesheet
 * =========================================
 * Brand Colors: #086586 (Primary Teal), #fd4f18 (Accent Orange)
 * FULLY RESPONSIVE - Mobile First Design
 */

/* ============================================================================
   CSS VARIABLES - AcadNet Brand System
   ============================================================================ */
:root {
    /* Primary Brand - Teal */
    --primary: #086586;
    --primary-light: #0a89b3;
    --primary-dark: #054d66;
    --primary-darker: #033d52;
    --primary-subtle: #e8f4f8;
    --primary-gradient: linear-gradient(135deg, #086586 0%, #0a89b3 100%);

    /* Accent Brand - Orange */
    --accent: #fd4f18;
    --accent-light: #ff6a3d;
    --accent-dark: #e04010;
    --accent-subtle: #fff1ec;
    --accent-gradient: linear-gradient(135deg, #fd4f18 0%, #ff6a3d 100%);

    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Semantic Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --error: #ef4444;
    --error-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Plus Jakarta Sans', var(--font-primary);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.03);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.06), 0 1px 2px -1px rgb(0 0 0 / 0.06);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.08);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.08);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.2);
    --shadow-primary: 0 4px 14px 0 rgba(8, 101, 134, 0.25);
    --shadow-accent: 0 4px 14px 0 rgba(253, 79, 24, 0.25);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --container-max: 1280px;
    --sidebar-width: 260px;
    --header-height: 64px;
}

/* ============================================================================
   BASE STYLES - CRITICAL OVERFLOW FIX
   ============================================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    width: 100%;
    min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition-fast); -webkit-tap-highlight-color: transparent; }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

h1 { font-size: 1.75rem; font-weight: 700; }
h2 { font-size: 1.5rem; font-weight: 700; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

@media (min-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.875rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
}

p { margin-bottom: var(--space-md); word-wrap: break-word; overflow-wrap: break-word; }

.text-muted { color: var(--gray-500); }
.text-small { font-size: 0.875rem; }
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }

::selection { background: var(--primary); color: var(--white); }

/* ============================================================================
   LAYOUT - Mobile First - FIXED OVERFLOW
   ============================================================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-sm);
}
@media (min-width: 400px) {
    .container { padding: 0 var(--space-md); }
}
@media (min-width: 768px) {
    .container { padding: 0 var(--space-lg); }
}

.page-wrapper {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

.main-content {
    flex: 1;
    min-width: 0; /* CRITICAL - allows flex child to shrink */
    padding: var(--space-md);
    padding-top: calc(var(--header-height) + var(--space-md));
    min-height: 100vh;
    background: var(--gray-50);
    width: 100%;
}
@media (min-width: 1025px) {
    .main-content {
        margin-left: var(--sidebar-width);
        padding: var(--space-xl);
        padding-top: calc(var(--header-height) + var(--space-xl));
        width: calc(100% - var(--sidebar-width));
    }
}
.main-content.no-sidebar {
    margin-left: 0;
    width: 100%;
}

.page-header { margin-bottom: var(--space-lg); }
@media (min-width: 768px) { .page-header { margin-bottom: var(--space-xl); } }
.page-title { font-size: 1.5rem; font-weight: 700; margin-bottom: var(--space-xs); color: var(--gray-900); }
@media (min-width: 768px) { .page-title { font-size: 1.75rem; } }
.page-subtitle { color: var(--gray-500); font-size: 0.9375rem; }

/* Grid System - Mobile First - FIXED with minmax */
.grid { display: grid; gap: var(--space-sm); width: 100%; }
@media (min-width: 400px) { .grid { gap: var(--space-md); } }
@media (min-width: 768px) { .grid { gap: var(--space-lg); } }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
    .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ============================================================================
   TOP HEADER - Responsive
   ============================================================================ */
.top-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-sm) var(--space-md);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}
@media (min-width: 1025px) {
    .top-header {
        left: var(--sidebar-width);
        padding: var(--space-md) var(--space-xl);
    }
}
.top-header.full-width { left: 0; }

.header-search {
    flex: 1;
    max-width: 400px;
    display: none;
}
@media (min-width: 640px) {
    .header-search { display: block; }
}
.header-search input {
    width: 100%;
    padding: 8px var(--space-md);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    background: var(--gray-50);
    transition: all var(--transition-base);
}
.header-search input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 3px var(--primary-subtle);
}
.header-search input::placeholder { color: var(--gray-400); }

.header-actions { display: flex; align-items: center; gap: var(--space-xs); }
@media (min-width: 640px) { .header-actions { gap: var(--space-sm); } }

.header-icon-btn {
    width: 38px; height: 38px; border-radius: var(--radius-full); border: none;
    background: var(--gray-100); color: var(--gray-600); cursor: pointer;
    display: flex; align-items: center; justify-content: center; position: relative;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}
@media (min-width: 640px) {
    .header-icon-btn { width: 42px; height: 42px; }
}
.header-icon-btn:hover { background: var(--primary-subtle); color: var(--primary); }
.header-icon-btn svg { width: 18px; height: 18px; }
@media (min-width: 640px) {
    .header-icon-btn svg { width: 20px; height: 20px; }
}
.header-icon-btn .badge {
    position: absolute; top: -2px; right: -2px; background: var(--accent); color: var(--white);
    font-size: 0.5625rem; font-weight: 600; min-width: 16px; height: 16px; border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center; border: 2px solid var(--white);
}

/* ============================================================================
   SIDEBAR - Responsive with Overlay
   ============================================================================ */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--gray-900) 0%, #0c1929 100%);
    color: var(--white);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    display: flex;
    flex-direction: column;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
}
@media (min-width: 1025px) {
    .sidebar { transform: translateX(0); }
}
.sidebar.open { transform: translateX(0); }

.sidebar-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 199;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}
.sidebar-overlay.active { opacity: 1; visibility: visible; }

.sidebar-header { padding: var(--space-md) var(--space-lg); border-bottom: 1px solid rgba(255,255,255,0.08); }
.sidebar-logo { display: flex; align-items: center; gap: var(--space-sm); }
.sidebar-logo img { height: 36px; width: auto; }
.sidebar-logo span { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--white); letter-spacing: -0.02em; }

.sidebar-nav { flex: 1; padding: var(--space-md) 0; overflow-y: auto; -webkit-overflow-scrolling: touch; }
.nav-section { margin-bottom: var(--space-lg); }
.nav-section-title { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--gray-500); padding: 0 var(--space-lg); margin-bottom: var(--space-sm); }
.nav-item {
    display: flex; align-items: center; gap: var(--space-sm);
    padding: 14px var(--space-lg);
    color: var(--gray-400);
    border-left: 3px solid transparent;
    transition: all var(--transition-fast);
    font-size: 0.9375rem;
    -webkit-tap-highlight-color: transparent;
}
.nav-item:hover { background: rgba(255,255,255,0.05); color: var(--white); }
.nav-item.active { background: rgba(8, 101, 134, 0.2); color: var(--white); border-left-color: var(--accent); }
.nav-item svg { width: 20px; height: 20px; flex-shrink: 0; opacity: 0.8; }
.nav-item.active svg { opacity: 1; }
.nav-item .badge { margin-left: auto; }

.sidebar-footer { padding: var(--space-md) var(--space-lg); border-top: 1px solid rgba(255,255,255,0.08); background: rgba(0,0,0,0.2); }
.sidebar-user { display: flex; align-items: center; gap: var(--space-sm); }
.sidebar-user-avatar { width: 38px; height: 38px; border-radius: var(--radius-full); background: var(--primary-gradient); display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 0.8125rem; flex-shrink: 0; overflow: hidden; }
.sidebar-user-avatar img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name { font-weight: 600; font-size: 0.875rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--white); }
.sidebar-user-role { font-size: 0.75rem; color: var(--gray-400); }

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    width: 38px; height: 38px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--gray-600);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
}
.mobile-menu-btn:hover { background: var(--gray-100); }
@media (min-width: 1025px) { .mobile-menu-btn { display: none; } }

/* ============================================================================
   CARDS - Responsive - FIXED OVERFLOW
   ============================================================================ */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: all var(--transition-base);
    width: 100%;
    min-width: 0; /* Allow shrinking */
}
.card:hover { box-shadow: var(--shadow-md); }
.card-header {
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    background: var(--gray-50);
}
@media (min-width: 640px) {
    .card-header {
        padding: var(--space-lg);
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}
.card-title { font-size: 1rem; font-weight: 600; color: var(--gray-800); }
@media (min-width: 640px) { .card-title { font-size: 1.125rem; } }
.card-body { padding: var(--space-md); }
@media (min-width: 640px) { .card-body { padding: var(--space-lg); } }
.card-footer { padding: var(--space-md); background: var(--gray-50); border-top: 1px solid var(--gray-100); }

/* Member Card */
.member-card { padding: var(--space-lg); text-align: center; transition: all var(--transition-base); }
.member-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-subtle); }
.member-avatar {
    width: 72px; height: 72px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    color: var(--white);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; font-weight: 600;
    margin: 0 auto var(--space-md);
    box-shadow: var(--shadow-primary);
    overflow: hidden;
}
@media (min-width: 640px) {
    .member-avatar { width: 88px; height: 88px; font-size: 1.75rem; }
}
.member-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-full); }
.member-name { font-size: 1rem; font-weight: 600; margin-bottom: var(--space-xs); color: var(--gray-900); }
.member-title { font-size: 0.8125rem; color: var(--gray-500); margin-bottom: var(--space-xs); }
.member-institution { font-size: 0.75rem; color: var(--gray-400); margin-bottom: var(--space-md); }
.member-tags { display: flex; flex-wrap: wrap; gap: var(--space-xs); justify-content: center; margin-bottom: var(--space-md); }
.member-meta { display: flex; align-items: center; justify-content: center; gap: var(--space-sm); font-size: 0.8125rem; color: var(--gray-500); flex-wrap: wrap; }
.verified-badge { display: inline-flex; align-items: center; gap: 4px; color: var(--success); font-size: 0.75rem; font-weight: 500; }

/* Service Card */
.service-card { transition: all var(--transition-base); }
.service-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: var(--primary-subtle); }
.service-card .card-body { display: flex; flex-direction: column; gap: var(--space-sm); }
.service-category { font-size: 0.65rem; font-weight: 600; color: var(--primary); text-transform: uppercase; letter-spacing: 0.06em; background: var(--primary-subtle); padding: 3px 8px; border-radius: var(--radius-full); display: inline-block; width: fit-content; }
.service-title { font-size: 1rem; font-weight: 600; color: var(--gray-800); }
.service-description { font-size: 0.8125rem; color: var(--gray-600); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.6; }
.service-provider { display: flex; align-items: center; gap: var(--space-sm); margin-top: var(--space-sm); padding-top: var(--space-md); border-top: 1px solid var(--gray-100); }
.service-provider-avatar { width: 32px; height: 32px; border-radius: var(--radius-full); background: var(--primary-gradient); color: var(--white); display: flex; align-items: center; justify-content: center; font-size: 0.6875rem; font-weight: 600; flex-shrink: 0; overflow: hidden; }
.service-provider-avatar img { width: 100%; height: 100%; object-fit: cover; }
.service-provider-name { font-size: 0.8125rem; font-weight: 500; color: var(--gray-700); }

/* ============================================================================
   BUTTONS - Touch Friendly (44px min)
   ============================================================================ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: var(--space-sm);
    padding: 10px var(--space-md);
    font-family: var(--font-primary); font-size: 0.875rem; font-weight: 500;
    border-radius: var(--radius-md); border: none; cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none; white-space: nowrap; line-height: 1.4;
    -webkit-tap-highlight-color: transparent;
    min-height: 44px;
}
@media (min-width: 640px) {
    .btn { padding: 10px var(--space-lg); min-height: auto; }
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-light); color: var(--white); box-shadow: var(--shadow-primary); transform: translateY(-1px); }
.btn-accent { background: var(--accent); color: var(--white); }
.btn-accent:hover { background: var(--accent-light); color: var(--white); box-shadow: var(--shadow-accent); transform: translateY(-1px); }
.btn-secondary { background: var(--gray-100); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-200); }
.btn-outline { background: transparent; border: 1.5px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-subtle); }
.btn-ghost { background: transparent; color: var(--gray-600); }
.btn-ghost:hover { background: var(--gray-100); color: var(--gray-800); }
.btn-sm { padding: 6px var(--space-sm); font-size: 0.8125rem; min-height: 36px; }
.btn-lg { padding: 14px var(--space-lg); font-size: 0.9375rem; font-weight: 600; }
.btn-block { width: 100%; }

/* ============================================================================
   FORMS - Mobile Optimized
   ============================================================================ */
.form-group { margin-bottom: var(--space-md); }
@media (min-width: 640px) { .form-group { margin-bottom: var(--space-lg); } }
.form-label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--gray-700); margin-bottom: var(--space-sm); }
.form-label.required::after { content: ' *'; color: var(--accent); }
.form-control {
    width: 100%; padding: 12px var(--space-md);
    font-family: var(--font-primary); font-size: 16px; /* Prevent iOS zoom */
    color: var(--gray-800); background: var(--white);
    border: 1.5px solid var(--gray-300); border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-subtle); }
.form-control.error { border-color: var(--error); }
.form-control::placeholder { color: var(--gray-400); }
textarea.form-control { min-height: 100px; resize: vertical; }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right var(--space-md) center; padding-right: 2.5rem; }
.form-hint { font-size: 0.75rem; color: var(--gray-500); margin-top: var(--space-xs); }
.form-error { font-size: 0.75rem; color: var(--error); margin-top: var(--space-xs); }
.form-row { display: grid; grid-template-columns: 1fr; gap: var(--space-md); }
@media (min-width: 640px) { .form-row { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-lg); } }
.form-check { display: flex; align-items: center; gap: var(--space-sm); cursor: pointer; min-height: 44px; }
.form-check input { width: 20px; height: 20px; accent-color: var(--primary); }

/* ============================================================================
   TAGS & BADGES
   ============================================================================ */
.tag { display: inline-flex; align-items: center; padding: 4px 8px; font-size: 0.6875rem; font-weight: 500; border-radius: var(--radius-full); background: var(--gray-100); color: var(--gray-600); }
.tag-primary { background: var(--primary-subtle); color: var(--primary); }
.tag-accent { background: var(--accent-subtle); color: var(--accent); }
.tag-success { background: var(--success-light); color: #047857; }
.badge { display: inline-flex; align-items: center; padding: 2px 6px; font-size: 0.5625rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; border-radius: var(--radius-full); }
.badge-primary { background: var(--primary); color: var(--white); }
.badge-accent { background: var(--accent); color: var(--white); }
.badge-success { background: var(--success); color: var(--white); }

/* ============================================================================
   ALERTS
   ============================================================================ */
.alert { padding: var(--space-md); border-radius: var(--radius-md); margin-bottom: var(--space-md); display: flex; align-items: flex-start; gap: var(--space-sm); font-size: 0.875rem; }
.alert-success { background: var(--success-light); color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: var(--error-light); color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: var(--warning-light); color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: var(--info-light); color: #1e40af; border: 1px solid #bfdbfe; }

/* ============================================================================
   TABLES - Responsive with Horizontal Scroll
   ============================================================================ */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
}
.table { width: 100%; border-collapse: collapse; min-width: 600px; }
.table th, .table td { padding: var(--space-sm) var(--space-md); text-align: left; border-bottom: 1px solid var(--gray-200); }
.table th { font-size: 0.6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--gray-500); background: var(--gray-50); white-space: nowrap; }
.table tbody tr:hover { background: var(--gray-50); }

/* ============================================================================
   STATS - Responsive Grid
   ============================================================================ */
.stats-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-sm); margin-bottom: var(--space-lg); }
@media (min-width: 480px) { .stats-grid { gap: var(--space-md); } }
@media (min-width: 768px) { .stats-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-lg); margin-bottom: var(--space-xl); } }
.stat-card { padding: var(--space-sm); position: relative; overflow: hidden; transition: all var(--transition-base); text-align: center; }
@media (min-width: 400px) { .stat-card { padding: var(--space-md); } }
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
@media (min-width: 640px) { .stat-card { padding: var(--space-lg); } }
.stat-card::before { content: ''; position: absolute; top: 0; right: 0; width: 60px; height: 60px; background: var(--primary-subtle); border-radius: var(--radius-full); transform: translate(30%, -30%); opacity: 0.5; }
.stat-icon { width: 44px; height: 44px; border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; margin-bottom: var(--space-sm); position: relative; }
.stat-icon.primary { background: var(--primary-subtle); color: var(--primary); }
.stat-icon.accent { background: var(--accent-subtle); color: var(--accent); }
.stat-icon.success { background: var(--success-light); color: var(--success); }
.stat-icon.info { background: var(--info-light); color: var(--info); }
.stat-value { font-family: var(--font-display); font-size: 1.125rem; font-weight: 700; color: var(--gray-900); line-height: 1; margin-bottom: var(--space-xs); word-break: break-word; }
@media (min-width: 400px) { .stat-value { font-size: 1.25rem; } }
@media (min-width: 480px) { .stat-value { font-size: 1.5rem; } }
@media (min-width: 640px) { .stat-value { font-size: 2rem; } }
.stat-label { font-size: 0.625rem; color: var(--gray-500); font-weight: 500; }
@media (min-width: 400px) { .stat-label { font-size: 0.6875rem; } }
@media (min-width: 640px) { .stat-label { font-size: 0.75rem; } }

/* Stars & Pagination */
.stars { display: inline-flex; gap: 2px; }
.star { color: var(--gray-300); }
.star.filled { color: var(--warning); }

.pagination { margin-top: var(--space-lg); }
.pagination ul { display: flex; align-items: center; justify-content: center; gap: var(--space-xs); list-style: none; flex-wrap: wrap; }
.pagination li a, .pagination li span {
    display: flex; align-items: center; justify-content: center;
    min-width: 36px; height: 36px;
    padding: 0 var(--space-xs);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    color: var(--gray-600); background: var(--white);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-fast);
}
.pagination li a:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-subtle); }
.pagination li.active span { background: var(--primary); border-color: var(--primary); color: var(--white); }

/* ============================================================================
   MODALS - Mobile Bottom Sheet Style
   ============================================================================ */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); backdrop-filter: blur(4px); display: flex; align-items: flex-end; justify-content: center; z-index: 1000; opacity: 0; visibility: hidden; transition: all var(--transition-base); padding: 0; }
@media (min-width: 640px) { .modal-overlay { align-items: center; padding: var(--space-lg); } }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal { background: var(--white); border-radius: var(--radius-xl) var(--radius-xl) 0 0; width: 100%; max-width: 100%; max-height: 90vh; overflow: auto; transform: translateY(100%); transition: transform var(--transition-base); box-shadow: var(--shadow-2xl); }
@media (min-width: 640px) { .modal { border-radius: var(--radius-xl); max-width: 500px; transform: scale(0.95) translateY(20px); } }
.modal-overlay.active .modal { transform: translateY(0); }
@media (min-width: 640px) { .modal-overlay.active .modal { transform: scale(1) translateY(0); } }
.modal-header { padding: var(--space-md); border-bottom: 1px solid var(--gray-200); display: flex; align-items: center; justify-content: space-between; }
.modal-title { font-size: 1.125rem; font-weight: 600; }
.modal-close { width: 36px; height: 36px; border-radius: var(--radius-full); border: none; background: var(--gray-100); color: var(--gray-500); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all var(--transition-fast); }
.modal-close:hover { background: var(--gray-200); color: var(--gray-800); }
.modal-body { padding: var(--space-md); }
.modal-footer { padding: var(--space-md); border-top: 1px solid var(--gray-200); display: flex; flex-direction: column; gap: var(--space-sm); }
@media (min-width: 640px) { .modal-footer { flex-direction: row; justify-content: flex-end; } }

/* ============================================================================
   EMPTY STATES
   ============================================================================ */
.empty-state { text-align: center; padding: var(--space-xl) var(--space-md); }
.empty-state-icon { width: 72px; height: 72px; margin: 0 auto var(--space-md); background: var(--primary-subtle); border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; color: var(--primary); }
.empty-state-title { font-size: 1.125rem; font-weight: 600; margin-bottom: var(--space-sm); color: var(--gray-800); }
.empty-state-description { color: var(--gray-500); max-width: 400px; margin: 0 auto var(--space-md); font-size: 0.875rem; }

/* ============================================================================
   AUTH PAGES
   ============================================================================ */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%); padding: var(--space-md); position: relative; }
.auth-page::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"); }
.auth-container { width: 100%; max-width: 440px; position: relative; z-index: 1; }
.auth-card { background: var(--white); border-radius: var(--radius-xl); box-shadow: var(--shadow-2xl); overflow: hidden; }
.auth-header { text-align: center; padding: var(--space-lg) var(--space-md); background: var(--gray-50); }
.auth-logo { height: 44px; margin: 0 auto var(--space-sm); }
.auth-title { font-size: 1.25rem; font-weight: 700; margin-bottom: var(--space-xs); color: var(--gray-900); }
.auth-subtitle { color: var(--gray-500); font-size: 0.875rem; }
.auth-body { padding: var(--space-lg) var(--space-md); }
@media (min-width: 640px) { .auth-body { padding: var(--space-xl); } }
.auth-footer { padding: var(--space-md); background: var(--gray-50); text-align: center; font-size: 0.8125rem; color: var(--gray-600); border-top: 1px solid var(--gray-200); }
.auth-divider { display: flex; align-items: center; gap: var(--space-md); margin: var(--space-lg) 0; color: var(--gray-400); font-size: 0.875rem; }
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--gray-200); }

/* ============================================================================
   LANDING PAGE - Fully Responsive
   ============================================================================ */
.landing-nav { background: var(--white); position: fixed; top: 0; left: 0; right: 0; z-index: 100; box-shadow: var(--shadow-sm); border-bottom: 1px solid var(--gray-100); }
.landing-nav .container { display: flex; align-items: center; justify-content: space-between; padding-top: var(--space-xs); padding-bottom: var(--space-xs); min-height: 56px; gap: var(--space-sm); }
@media (min-width: 400px) { .landing-nav .container { padding-top: var(--space-sm); padding-bottom: var(--space-sm); min-height: 60px; } }
@media (min-width: 768px) { .landing-nav .container { padding-top: var(--space-md); padding-bottom: var(--space-md); min-height: 72px; } }
.landing-nav-logo { display: flex; align-items: center; gap: var(--space-xs); min-width: 0; }
@media (min-width: 400px) { .landing-nav-logo { gap: var(--space-sm); } }
.landing-nav-logo img { height: 28px; flex-shrink: 0; }
@media (min-width: 400px) { .landing-nav-logo img { height: 32px; } }
@media (min-width: 768px) { .landing-nav-logo img { height: 44px; } }
.landing-nav-logo span { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--primary); letter-spacing: -0.02em; white-space: nowrap; }
@media (min-width: 400px) { .landing-nav-logo span { font-size: 1.125rem; } }
@media (min-width: 768px) { .landing-nav-logo span { font-size: 1.5rem; } }

/* Desktop Navigation */
.landing-nav-links { display: none; align-items: center; gap: var(--space-lg); }
@media (min-width: 768px) { .landing-nav-links { display: flex; gap: var(--space-xl); } }
.landing-nav-links a:not(.btn) { color: var(--gray-600); font-weight: 500; padding: var(--space-sm) 0; position: relative; }
.landing-nav-links a:not(.btn)::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px; background: var(--primary); transform: scaleX(0); transition: transform var(--transition-fast); }
.landing-nav-links a:not(.btn):hover { color: var(--primary); }
.landing-nav-links a:not(.btn):hover::after { transform: scaleX(1); }

/* Mobile Navigation Toggle */
.landing-mobile-toggle {
    display: flex;
    width: 40px; height: 40px;
    align-items: center; justify-content: center;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--gray-700);
    -webkit-tap-highlight-color: transparent;
    flex-shrink: 0;
}
@media (min-width: 400px) { .landing-mobile-toggle { width: 44px; height: 44px; } }
@media (min-width: 768px) { .landing-mobile-toggle { display: none; } }

/* Mobile Navigation Menu */
.landing-mobile-menu {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--white);
    z-index: 101;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform var(--transition-base);
}
.landing-mobile-menu.active { transform: translateX(0); }
.landing-mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
    min-height: 60px;
}
.landing-mobile-menu-close {
    width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    border: none; background: var(--gray-100);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--gray-700);
}
.landing-mobile-menu-links {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-xs);
}
.landing-mobile-menu-links a {
    padding: var(--space-md);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius-md);
    min-height: 52px;
    display: flex;
    align-items: center;
}
.landing-mobile-menu-links a:hover { background: var(--gray-50); color: var(--primary); }
.landing-mobile-menu-links .btn { margin-top: var(--space-md); justify-content: center; }

/* Hero Section */
.landing-hero {
    padding: calc(60px + var(--space-lg)) 0 var(--space-lg);
    background: linear-gradient(180deg, var(--primary-subtle) 0%, var(--white) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}
@media (min-width: 480px) {
    .landing-hero { padding: calc(70px + var(--space-xl)) 0 var(--space-xl); }
}
@media (min-width: 768px) {
    .landing-hero { padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl); }
}
.landing-hero .container { position: relative; z-index: 1; }
.landing-hero h1 {
    font-size: 1.5rem;
    font-weight: 800;
    max-width: 800px;
    margin: 0 auto var(--space-sm);
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--gray-900);
    padding: 0 var(--space-xs);
}
@media (min-width: 400px) { .landing-hero h1 { font-size: 1.625rem; margin-bottom: var(--space-md); padding: 0; } }
@media (min-width: 640px) { .landing-hero h1 { font-size: 2.25rem; letter-spacing: -0.03em; } }
@media (min-width: 768px) { .landing-hero h1 { font-size: 3rem; margin-bottom: var(--space-lg); } }
.landing-hero h1 span { color: var(--accent); }
.landing-hero > .container > p {
    font-size: 0.875rem;
    color: var(--gray-600);
    max-width: 620px;
    margin: 0 auto var(--space-md);
    line-height: 1.6;
    padding: 0 var(--space-xs);
}
@media (min-width: 400px) { .landing-hero > .container > p { font-size: 0.9375rem; margin-bottom: var(--space-lg); padding: 0; } }
@media (min-width: 768px) { .landing-hero > .container > p { font-size: 1.25rem; margin-bottom: var(--space-xl); } }
.hero-buttons { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-sm); padding: 0 var(--space-xs); }
@media (min-width: 400px) { .hero-buttons { padding: 0 var(--space-md); } }
@media (min-width: 480px) { .hero-buttons { flex-direction: row; gap: var(--space-md); padding: 0; } }
.hero-buttons .btn { width: 100%; min-width: 0; }
@media (min-width: 480px) { .hero-buttons .btn { width: auto; min-width: 140px; } }

/* Hero Stats */
.hero-stats { max-width: 700px; margin: var(--space-lg) auto 0; padding: 0 var(--space-xs); }
@media (min-width: 400px) { .hero-stats { margin-top: var(--space-xl); padding: 0; } }

/* Sections */
.landing-section { padding: var(--space-lg) 0; }
@media (min-width: 480px) { .landing-section { padding: var(--space-xl) 0; } }
@media (min-width: 768px) { .landing-section { padding: var(--space-3xl) 0; } }
.landing-section.bg-gray { background: var(--gray-50); }
.section-header { text-align: center; max-width: 600px; margin: 0 auto var(--space-lg); padding: 0 var(--space-sm); }
@media (min-width: 480px) { .section-header { margin-bottom: var(--space-xl); padding: 0 var(--space-md); } }
@media (min-width: 768px) { .section-header { margin-bottom: var(--space-2xl); padding: 0; } }
.section-header h2 { font-size: 1.25rem; margin-bottom: var(--space-xs); color: var(--gray-900); line-height: 1.2; }
@media (min-width: 400px) { .section-header h2 { font-size: 1.375rem; margin-bottom: var(--space-sm); } }
@media (min-width: 640px) { .section-header h2 { font-size: 1.75rem; } }
@media (min-width: 768px) { .section-header h2 { font-size: 2.25rem; } }
.section-header p { color: var(--gray-500); font-size: 0.8125rem; line-height: 1.5; }
@media (min-width: 480px) { .section-header p { font-size: 0.9375rem; } }

/* Feature Grid */
.feature-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-sm); padding: 0 var(--space-xs); }
@media (min-width: 400px) { .feature-grid { gap: var(--space-md); padding: 0; } }
@media (min-width: 640px) { .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-lg); } }
@media (min-width: 1024px) { .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xl); } }
.feature-card { text-align: center; padding: var(--space-md); transition: all var(--transition-base); }
@media (min-width: 400px) { .feature-card { padding: var(--space-lg); } }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-icon { width: 48px; height: 48px; border-radius: var(--radius-xl); background: var(--primary-subtle); color: var(--primary); display: flex; align-items: center; justify-content: center; margin: 0 auto var(--space-sm); transition: all var(--transition-base); }
@media (min-width: 400px) { .feature-icon { width: 56px; height: 56px; margin-bottom: var(--space-md); } }
.feature-card:hover .feature-icon { transform: scale(1.1); }
.feature-title { font-size: 0.9375rem; font-weight: 600; margin-bottom: var(--space-xs); color: var(--gray-800); }
@media (min-width: 400px) { .feature-title { font-size: 1.0625rem; margin-bottom: var(--space-sm); } }
.feature-description { color: var(--gray-500); font-size: 0.75rem; line-height: 1.6; margin-bottom: 0; }
@media (min-width: 400px) { .feature-description { font-size: 0.8125rem; } }

/* About Cards */
.about-card { padding: var(--space-md); }
@media (min-width: 400px) { .about-card { padding: var(--space-lg); } }
.about-card-icon { width: 40px; height: 40px; border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; margin-bottom: var(--space-sm); color: white; }
@media (min-width: 400px) { .about-card-icon { width: 48px; height: 48px; margin-bottom: var(--space-md); } }

/* CTA Section */
.cta-section { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); color: white; padding: var(--space-lg) 0; }
@media (min-width: 480px) { .cta-section { padding: var(--space-xl) 0; } }
@media (min-width: 768px) { .cta-section { padding: var(--space-3xl) 0; } }
.cta-section h2 { color: white; margin-bottom: var(--space-sm); font-size: 1.25rem; line-height: 1.2; }
@media (min-width: 400px) { .cta-section h2 { font-size: 1.5rem; margin-bottom: var(--space-md); } }
@media (min-width: 768px) { .cta-section h2 { font-size: 2.25rem; } }
.cta-section p { opacity: 0.9; max-width: 500px; margin: 0 auto var(--space-md); font-size: 0.8125rem; padding: 0 var(--space-sm); }
@media (min-width: 400px) { .cta-section p { font-size: 0.9375rem; margin-bottom: var(--space-lg); padding: 0; } }

/* Footer */
.landing-footer { background: var(--gray-900); color: var(--gray-300); padding: var(--space-lg) 0 var(--space-md); }
@media (min-width: 480px) { .landing-footer { padding: var(--space-xl) 0 var(--space-md); } }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-lg); margin-bottom: var(--space-lg); }
@media (min-width: 480px) { .footer-grid { gap: var(--space-xl); margin-bottom: var(--space-xl); } }
@media (min-width: 640px) { .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.footer-brand { text-align: center; }
@media (min-width: 640px) { .footer-brand { text-align: left; } }
.footer-brand .landing-nav-logo { justify-content: center; }
@media (min-width: 640px) { .footer-brand .landing-nav-logo { justify-content: flex-start; } }
.footer-brand p { margin-top: var(--space-sm); font-size: 0.8125rem; color: var(--gray-400); line-height: 1.5; }
@media (min-width: 400px) { .footer-brand p { margin-top: var(--space-md); font-size: 0.875rem; } }
.footer-links { text-align: center; }
@media (min-width: 640px) { .footer-links { text-align: left; } }
.footer-links h4 { color: var(--white); font-size: 0.8125rem; font-weight: 600; margin-bottom: var(--space-sm); text-transform: uppercase; letter-spacing: 0.05em; }
@media (min-width: 400px) { .footer-links h4 { font-size: 0.875rem; margin-bottom: var(--space-md); } }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: var(--space-xs); }
@media (min-width: 400px) { .footer-links li { margin-bottom: var(--space-sm); } }
.footer-links a { color: var(--gray-400); font-size: 0.8125rem; transition: color var(--transition-fast); }
@media (min-width: 400px) { .footer-links a { font-size: 0.875rem; } }
.footer-links a:hover { color: var(--white); }
.footer-bottom { padding-top: var(--space-md); border-top: 1px solid rgba(255,255,255,0.1); display: flex; flex-direction: column; align-items: center; gap: var(--space-xs); font-size: 0.75rem; color: var(--gray-500); text-align: center; }
@media (min-width: 400px) { .footer-bottom { padding-top: var(--space-lg); gap: var(--space-sm); font-size: 0.8125rem; } }
@media (min-width: 640px) { .footer-bottom { flex-direction: row; justify-content: space-between; text-align: left; } }

/* ============================================================================
   MESSAGES PAGE - Responsive Layout - FIXED
   ============================================================================ */
.messages-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 220px);
    min-height: 400px;
    max-height: 600px;
    overflow: hidden;
    width: 100%;
}
@media (min-width: 768px) {
    .messages-container {
        display: grid;
        grid-template-columns: 280px minmax(0, 1fr);
        height: calc(100vh - 240px);
        max-height: 650px;
    }
}
@media (min-width: 1024px) {
    .messages-container { grid-template-columns: 300px minmax(0, 1fr); }
}

.conversations-list {
    border-bottom: 1px solid var(--gray-200);
    overflow-y: auto;
    overflow-x: hidden;
    display: none;
    min-height: 0;
    min-width: 0;
}
.conversations-list.active { display: block; flex: 1; }
@media (min-width: 768px) {
    .conversations-list {
        display: block !important;
        border-bottom: none;
        border-right: 1px solid var(--gray-200);
    }
}

.conversations-header {
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    background: var(--white);
    z-index: 1;
}

.conversation-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-100);
    text-decoration: none;
    color: inherit;
    transition: background var(--transition-fast);
}
.conversation-item:hover { background: var(--gray-50); }
.conversation-item.active { background: var(--primary-subtle); }
.conversation-item.unread { background: var(--accent-subtle); }

.message-thread {
    display: none;
    flex-direction: column;
    height: 100%;
    min-height: 0;
    min-width: 0;
    overflow: hidden;
}
.message-thread.active { display: flex; flex: 1; }
@media (min-width: 768px) {
    .message-thread { display: flex !important; }
}

.message-thread-header {
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
    background: var(--white);
}

.message-back-btn {
    display: flex;
    width: 36px; height: 36px;
    align-items: center; justify-content: center;
    border: none; background: var(--gray-100);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--gray-700);
    flex-shrink: 0;
}
@media (min-width: 768px) { .message-back-btn { display: none; } }

.message-thread-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    min-height: 0;
    -webkit-overflow-scrolling: touch;
}

.message-bubble {
    display: flex;
    animation: fadeIn 0.3s ease;
}
.message-bubble.sent { justify-content: flex-end; }
.message-bubble-content {
    max-width: 85%;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    word-break: break-word;
}
@media (min-width: 768px) { .message-bubble-content { max-width: 70%; } }
.message-bubble.sent .message-bubble-content { background: var(--primary); color: white; }
.message-bubble.received .message-bubble-content { background: var(--gray-100); }

.message-thread-form {
    padding: var(--space-md);
    border-top: 1px solid var(--gray-200);
    flex-shrink: 0;
    background: var(--white);
}
.message-thread-form form {
    display: flex;
    gap: var(--space-sm);
}
.message-thread-form textarea {
    flex: 1;
    min-width: 0;
    resize: none;
    min-height: 44px;
    max-height: 100px;
}

.message-empty {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: var(--space-xl);
}
@media (min-width: 768px) {
    .message-empty { display: flex; }
    .message-thread:not(.has-conversation) .message-empty { display: flex; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================================================
   MEMBER PROFILE / CONTENT WITH SIDEBAR - Responsive Layout
   ============================================================================ */
.member-profile-layout {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    width: 100%;
}
@media (min-width: 1024px) {
    .member-profile-layout {
        display: grid;
        grid-template-columns: 300px minmax(0, 1fr);
        gap: var(--space-xl);
        align-items: start;
    }
}

.content-with-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    width: 100%;
}
@media (min-width: 1024px) {
    .content-with-sidebar {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 300px;
        gap: var(--space-xl);
        align-items: start;
    }
}

.member-profile-sidebar {
    position: static;
    width: 100%;
}
@media (min-width: 1024px) {
    .member-profile-sidebar {
        position: sticky;
        top: calc(var(--header-height) + var(--space-lg));
    }
}

.member-profile-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}
@media (min-width: 480px) and (max-width: 1023px) {
    .member-profile-actions {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    .member-profile-actions .btn { flex: 1; min-width: 140px; }
}

/* ============================================================================
   CONNECTIONS PAGE - Responsive Tabs
   ============================================================================ */
.connections-tabs {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: var(--space-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.connections-tabs .btn { flex-shrink: 0; }

/* ============================================================================
   UTILITIES
   ============================================================================ */
.mt-0 { margin-top: 0; } .mt-1 { margin-top: var(--space-sm); } .mt-2 { margin-top: var(--space-md); } .mt-3 { margin-top: var(--space-lg); } .mt-4 { margin-top: var(--space-xl); }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: var(--space-sm); } .mb-2 { margin-bottom: var(--space-md); } .mb-3 { margin-bottom: var(--space-lg); } .mb-4 { margin-bottom: var(--space-xl); }
.p-0 { padding: 0; } .p-1 { padding: var(--space-sm); } .p-2 { padding: var(--space-md); } .p-3 { padding: var(--space-lg); } .p-4 { padding: var(--space-xl); }
.d-flex { display: flex; } .d-grid { display: grid; } .d-none { display: none; } .d-block { display: block; }
.align-center { align-items: center; } .justify-center { justify-content: center; } .justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-sm); } .gap-2 { gap: var(--space-md); } .gap-3 { gap: var(--space-lg); }
.w-100 { width: 100%; } .h-100 { height: 100%; }
.flex-wrap { flex-wrap: wrap; }
.flex-column { flex-direction: column; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

/* Focus Styles */
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* Safe area for iOS */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .main-content { padding-bottom: calc(var(--space-xl) + env(safe-area-inset-bottom)); }
    .modal { padding-bottom: env(safe-area-inset-bottom); }
    .message-thread-form { padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom)); }
}

/* Print */
@media print {
    .sidebar, .top-header, .btn, .landing-nav, .mobile-menu-btn, .landing-mobile-toggle { display: none !important; }
    .main-content { margin-left: 0 !important; padding: 0 !important; width: 100% !important; }
}