:root {
    --blurple: #5865F2;
    --blurple-dark: #4752C4;
    --blurple-deeper: #3A45A8;
    --blurple-light: #7983F5;
    --blurple-glow: rgba(88, 101, 242, 0.25);
    --baby-blue: #89CFF0;
    --baby-blue-light: #B0E0F0;
    --baby-blue-dark: #5FA8D3;
    --baby-blue-glow: rgba(137, 207, 240, 0.2);

    --radius: 20px;
    --radius-sm: 12px;
    --radius-xs: 8px;
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 2px 12px rgba(88, 101, 242, 0.08);
    --shadow-lg: 0 8px 32px rgba(88, 101, 242, 0.15);
    --shadow-xl: 0 12px 48px rgba(88, 101, 242, 0.2);
}

[data-theme="light"] {
    --bg-primary: #EEF2FF;
    --bg-secondary: rgba(255, 255, 255, 0.75);
    --bg-tertiary: rgba(255, 255, 255, 0.55);
    --bg-hover: rgba(88, 101, 242, 0.08);
    --bg-glass: rgba(255, 255, 255, 0.6);
    --bg-glass-strong: rgba(255, 255, 255, 0.8);
    --text-primary: #1A1A2E;
    --text-secondary: #4A4A6A;
    --text-muted: #8A8AA0;
    --border-color: rgba(208, 213, 240, 0.5);
    --border-glass: rgba(255, 255, 255, 0.8);
    --overlay-color: rgba(0, 0, 0, 0.3);
    --card-shadow: 0 4px 24px rgba(88, 101, 242, 0.08);
    --gradient-bg: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 30%, #DBEAFE 60%, #F0F4FF 100%);
}

[data-theme="dark"] {
    --bg-primary: #0B0D17;
    --bg-secondary: rgba(22, 25, 45, 0.85);
    --bg-tertiary: rgba(30, 34, 55, 0.6);
    --bg-hover: rgba(88, 101, 242, 0.12);
    --bg-glass: rgba(22, 25, 45, 0.6);
    --bg-glass-strong: rgba(22, 25, 45, 0.8);
    --text-primary: #E8ECFF;
    --text-secondary: #A0A5C0;
    --text-muted: #6B7090;
    --border-color: rgba(88, 101, 242, 0.15);
    --border-glass: rgba(88, 101, 242, 0.1);
    --overlay-color: rgba(0, 0, 0, 0.6);
    --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --gradient-bg: linear-gradient(135deg, #0B0D17 0%, #111327 30%, #0F1529 60%, #0B0D17 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gradient-bg);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.5s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--blurple);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--blurple-light);
}

button {
    cursor: pointer;
    font-family: inherit;
}

input, textarea {
    font-family: inherit;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--blurple);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--blurple-dark);
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
    max-width: 1260px;
    margin: 0 auto;
    padding: 0 8px;
    position: relative;
}

/* Sidebar */
.sidebar {
    width: 270px;
    padding: 16px 8px;
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: var(--bg-glass);
}

.logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--blurple);
    padding: 12px 16px;
    margin-bottom: 4px;
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--blurple), var(--baby-blue));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
    box-shadow: 0 4px 12px var(--blurple-glow);
}

.logo span {
    color: var(--baby-blue);
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    padding-top: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    background: none;
    border: none;
    transition: var(--transition);
    width: 100%;
    text-align: left;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--blurple), var(--baby-blue));
    opacity: 0;
    transition: var(--transition);
    border-radius: var(--radius);
}

.nav-link:hover::before {
    opacity: 0.06;
}

.nav-link:hover {
    transform: translateX(4px);
    text-decoration: none;
}

.nav-link.active {
    color: var(--blurple);
    font-weight: 700;
    background: rgba(88, 101, 242, 0.08);
}

.nav-link.active::before {
    opacity: 0.08;
}

.nav-link .icon {
    font-size: 22px;
    width: 28px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.nav-link .label {
    position: relative;
    z-index: 1;
}

.nav-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 16px;
}

.post-btn {
    background: linear-gradient(135deg, var(--blurple), var(--blurple-dark));
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 700;
    margin: 8px 0 4px;
    transition: var(--transition);
    width: 100%;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 16px var(--blurple-glow);
}

.post-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--blurple-dark), var(--blurple-deeper));
    opacity: 0;
    transition: var(--transition);
}

.post-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--blurple-glow);
}

.post-btn:hover::after {
    opacity: 1;
}

.post-btn .label {
    position: relative;
    z-index: 1;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-radius: var(--radius);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 4px;
    width: 100%;
}

.theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.theme-toggle .toggle-track {
    width: 44px;
    height: 24px;
    background: var(--border-color);
    border-radius: 12px;
    position: relative;
    transition: var(--transition);
    flex-shrink: 0;
}

.theme-toggle .toggle-thumb {
    width: 20px;
    height: 20px;
    background: var(--blurple);
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
}

[data-theme="dark"] .theme-toggle .toggle-thumb {
    left: 22px;
}

[data-theme="dark"] .theme-toggle .toggle-track {
    background: var(--blurple-glow);
}

/* User info in sidebar */
.sidebar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 4px;
    position: relative;
    overflow: hidden;
}

.sidebar-user::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--blurple), var(--baby-blue));
    opacity: 0;
    transition: var(--transition);
    border-radius: var(--radius);
}

.sidebar-user:hover::before {
    opacity: 0.06;
}

.sidebar-user:hover {
    transform: translateX(2px);
}

.sidebar-user .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blurple), var(--baby-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    box-shadow: 0 2px 8px var(--blurple-glow);
}

.sidebar-user .user-info {
    flex: 1;
    min-width: 0;
    position: relative;
    z-index: 1;
}

.sidebar-user .display-name {
    font-weight: 700;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user .username {
    font-size: 13px;
    color: var(--text-muted);
}

.sidebar-user .logout-btn {
    padding: 6px;
    border-radius: var(--radius-xs);
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.sidebar-user .logout-btn:hover {
    background: rgba(231, 76, 60, 0.1);
    color: #E74C3C;
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 600px;
    border-right: 1px solid var(--border-color);
    border-left: 1px solid var(--border-color);
    min-height: 100vh;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    background: var(--bg-tertiary);
}

.page-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-glass-strong);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.page-header h2 {
    font-size: 20px;
    font-weight: 800;
}

.page-header .subtitle {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Compose Box */
.compose-box {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; max-height: 0; transform: translateY(-8px); }
    to { opacity: 1; max-height: 300px; transform: translateY(0); }
}

.compose-box textarea {
    width: 100%;
    min-height: 80px;
    border: none;
    resize: none;
    font-size: 16px;
    background: transparent;
    padding: 8px 0;
    color: var(--text-primary);
}

.compose-box textarea:focus {
    outline: none;
}

.compose-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.compose-actions .char-count {
    font-size: 13px;
    color: var(--text-muted);
    transition: var(--transition);
}

.compose-actions .char-count.over {
    color: #E74C3C;
    font-weight: 600;
}

.compose-actions .submit-btn {
    background: linear-gradient(135deg, var(--blurple), var(--blurple-dark));
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 700;
    transition: var(--transition);
    box-shadow: 0 2px 8px var(--blurple-glow);
}

.compose-actions .submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--blurple-glow);
}

.compose-actions .submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Posts Feed */
.feed {
    padding: 0;
}

.post {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
    animation: fadeInUp 0.3s ease both;
}

.post:nth-child(1) { animation-delay: 0s; }
.post:nth-child(2) { animation-delay: 0.05s; }
.post:nth-child(3) { animation-delay: 0.1s; }
.post:nth-child(4) { animation-delay: 0.15s; }
.post:nth-child(5) { animation-delay: 0.2s; }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.post:hover {
    background: var(--bg-hover);
    transform: translateX(2px);
}

.post-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.post-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blurple), var(--baby-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
    transition: var(--transition);
    box-shadow: 0 2px 8px var(--blurple-glow);
}

.post-avatar:hover {
    transform: scale(1.05);
}

.post-author-info {
    flex: 1;
    min-width: 0;
}

.post-author-info .display-name {
    font-weight: 700;
    font-size: 15px;
    transition: var(--transition);
}

.post-author-info .display-name:hover {
    color: var(--blurple);
}

.post-author-info .post-username {
    font-size: 14px;
    color: var(--text-muted);
}

.post-time {
    font-size: 13px;
    color: var(--text-muted);
}

.post-content {
    font-size: 15px;
    line-height: 1.6;
    padding-left: 52px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.post-actions {
    display: flex;
    gap: 48px;
    padding-left: 52px;
    margin-top: 12px;
}

.post-action {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 13px;
    padding: 6px 12px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.post-action:hover {
    background: var(--bg-hover);
    color: var(--blurple);
    transform: scale(1.05);
}

.post-action:active {
    transform: scale(0.95);
}

.post-action.liked {
    color: #E74C3C;
}

.post-action.liked:hover {
    background: rgba(231, 76, 60, 0.1);
}

/* Right Panel */
.right-panel {
    width: 320px;
    padding: 16px 20px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.search-box {
    background: var(--bg-glass-strong);
    border-radius: var(--radius);
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    transition: var(--transition);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.search-box:focus-within {
    border-color: var(--blurple);
    box-shadow: 0 0 0 3px var(--blurple-glow);
    transform: translateY(-1px);
}

.search-box input {
    border: none;
    background: transparent;
    font-size: 14px;
    color: var(--text-primary);
    width: 100%;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box input:focus {
    outline: none;
}

.search-box .search-icon {
    color: var(--text-muted);
    font-size: 16px;
}

.panel-card {
    background: var(--bg-glass-strong);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 16px;
    margin-bottom: 16px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition);
}

.panel-card:hover {
    box-shadow: var(--card-shadow);
}

.panel-card h3 {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.trend-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
    border-radius: var(--radius-xs);
    padding: 10px 8px;
    margin: 0 -8px;
}

.trend-item:last-child {
    border-bottom: none;
}

.trend-item:hover {
    background: var(--bg-hover);
}

.trend-item .trend-tag {
    font-weight: 700;
    font-size: 14px;
    color: var(--blurple);
}

.trend-item .trend-count {
    font-size: 12px;
    color: var(--text-muted);
}

.suggestion-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 8px;
    margin: 0 -8px;
    border-radius: var(--radius-xs);
    transition: var(--transition);
    cursor: pointer;
}

.suggestion-item:hover {
    background: var(--bg-hover);
}

.suggestion-item .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blurple), var(--baby-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
    box-shadow: 0 2px 6px var(--blurple-glow);
}

.suggestion-item .user-info {
    flex: 1;
    min-width: 0;
}

.suggestion-item .display-name {
    font-weight: 700;
    font-size: 14px;
}

.suggestion-item .username {
    font-size: 13px;
    color: var(--text-muted);
}

.follow-btn {
    background: linear-gradient(135deg, var(--blurple), var(--blurple-dark));
    color: white;
    border: none;
    padding: 7px 18px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
    box-shadow: 0 2px 8px var(--blurple-glow);
}

.follow-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--blurple-glow);
}

.follow-btn.following {
    background: transparent;
    color: var(--blurple);
    border: 1.5px solid var(--blurple);
    box-shadow: none;
}

/* Auth Pages */
.auth-page {
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--blurple) 0%, #4A55D0 30%, var(--blurple-light) 60%, var(--baby-blue) 100%);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.auth-page::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    border-radius: 50%;
}

.auth-page::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(137,207,240,0.15) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    border-radius: 50%;
}

.auth-card {
    background: var(--bg-glass-strong);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-glass);
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.5s ease;
}

.auth-card .logo {
    text-align: center;
    font-size: 32px;
    padding: 0;
    margin-bottom: 8px;
    justify-content: center;
}

.auth-card .subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 14px;
}

.auth-card .form-group {
    margin-bottom: 20px;
}

.auth-card label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.auth-card input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: var(--transition);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    backdrop-filter: blur(4px);
}

.auth-card input:focus {
    outline: none;
    border-color: var(--blurple);
    box-shadow: 0 0 0 3px var(--blurple-glow);
}

.auth-card .auth-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--blurple), var(--blurple-dark));
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 700;
    transition: var(--transition);
    margin-top: 8px;
    box-shadow: 0 4px 16px var(--blurple-glow);
}

.auth-card .auth-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--blurple-glow);
}

.auth-card .auth-btn:active {
    transform: translateY(0);
}

.auth-card .auth-btn:disabled {
    opacity: 0.6;
    transform: none;
}

.auth-card .auth-link {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-muted);
}

.auth-card .auth-link a {
    color: var(--blurple);
    font-weight: 600;
}

.auth-card .error-msg {
    color: #E74C3C;
    font-size: 13px;
    margin-top: 8px;
    text-align: center;
    animation: shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* Profile Page */
.profile-banner {
    height: 200px;
    background: linear-gradient(135deg, var(--blurple), var(--blurple-light), var(--baby-blue), var(--baby-blue-light));
    border-radius: 0;
    margin-bottom: -50px;
    position: relative;
    overflow: hidden;
}

.profile-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, var(--bg-tertiary) 100%);
}

.profile-info {
    padding: 0 20px 20px;
    position: relative;
}

.profile-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blurple), var(--baby-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 36px;
    border: 4px solid var(--bg-glass-strong);
    margin-top: -45px;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 16px var(--blurple-glow);
    transition: var(--transition);
}

.profile-avatar:hover {
    transform: scale(1.05);
}

.profile-display-name {
    font-size: 22px;
    font-weight: 800;
}

.profile-username {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.profile-bio {
    font-size: 15px;
    margin-bottom: 12px;
    line-height: 1.6;
}

.profile-stats {
    display: flex;
    gap: 24px;
}

.profile-stats .stat {
    font-size: 14px;
    color: var(--text-muted);
    transition: var(--transition);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-xs);
}

.profile-stats .stat:hover {
    background: var(--bg-hover);
}

.profile-stats .stat strong {
    color: var(--text-primary);
    font-weight: 700;
}

.profile-actions {
    margin: 12px 0;
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
    background: var(--bg-glass);
}

.tab {
    flex: 1;
    padding: 14px;
    text-align: center;
    background: none;
    border: none;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    transition: var(--transition);
    position: relative;
}

.tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tab.active {
    color: var(--blurple);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 56px;
    height: 3px;
    background: linear-gradient(90deg, var(--blurple), var(--baby-blue));
    border-radius: 3px;
    transition: var(--transition);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--overlay-color);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-glass-strong);
    border-radius: 24px;
    padding: 28px;
    width: 90%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-glass);
    animation: modalIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal h2 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 16px;
}

.modal textarea {
    width: 100%;
    min-height: 100px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px;
    font-size: 16px;
    resize: vertical;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: var(--transition);
}

.modal textarea:focus {
    outline: none;
    border-color: var(--blurple);
    box-shadow: 0 0 0 3px var(--blurple-glow);
}

.modal .modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 16px;
}

.modal .modal-actions button {
    padding: 10px 20px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.modal .cancel-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.modal .cancel-btn:hover {
    background: var(--bg-hover);
}

.modal .modal-submit-btn {
    background: linear-gradient(135deg, var(--blurple), var(--blurple-dark));
    border: none;
    color: white;
    box-shadow: 0 2px 8px var(--blurple-glow);
}

.modal .modal-submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--blurple-glow);
}

.modal .modal-submit-btn:disabled {
    opacity: 0.5;
    transform: none;
    box-shadow: none;
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.loading .spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border-color);
    border-top-color: var(--blurple);
    border-right-color: var(--baby-blue);
    border-radius: 50%;
    animation: spin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    margin: 0 auto 12px;
    box-shadow: 0 0 16px var(--blurple-glow);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error state */
.error-msg {
    color: #E74C3C;
    text-align: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
    animation: fadeInUp 0.4s ease;
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.empty-state h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

/* Post image */
.post-image {
    padding-left: 52px;
    margin-top: 8px;
}

.post-image img {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.post-image img:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-lg);
}

/* Image upload button */
.image-upload-btn {
    cursor: pointer;
    font-size: 20px;
    padding: 4px 8px;
    border-radius: var(--radius-xs);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
}

.image-upload-btn:hover {
    background: var(--bg-hover);
}

.remove-image-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0,0,0,0.6);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.remove-image-btn:hover {
    background: rgba(231, 76, 60, 0.9);
}

/* Edit profile style grids */
.style-grid {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.style-option {
    cursor: pointer;
    text-align: center;
    padding: 6px;
    border-radius: var(--radius-xs);
    transition: var(--transition);
    border: 2px solid transparent;
}

.style-option:hover {
    background: var(--bg-hover);
}

.style-option.selected {
    border-color: var(--blurple);
    background: var(--bg-hover);
}

.edit-profile-section {
    animation: fadeIn 0.3s ease;
}

/* ====== LANDING PAGE ====== */
.landing-page {
    min-height: 100vh;
    background: var(--gradient-bg);
    transition: background 0.5s ease;
}

.landing-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 40px;
    max-width: 1200px;
    margin: 0 auto;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: var(--bg-glass);
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--border-color);
}

.landing-logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--blurple);
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -1px;
}

.landing-logo span {
    color: var(--baby-blue);
}

.landing-nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.landing-btn-outline {
    padding: 10px 24px;
    border-radius: var(--radius);
    border: 1.5px solid var(--border-color);
    background: var(--bg-glass-strong);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    text-decoration: none;
}

.landing-btn-outline:hover {
    border-color: var(--blurple);
    color: var(--blurple);
    text-decoration: none;
    transform: translateY(-1px);
}

.landing-btn-primary {
    padding: 10px 24px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--blurple), var(--blurple-dark));
    color: white;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    text-decoration: none;
    box-shadow: 0 4px 16px var(--blurple-glow);
}

.landing-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--blurple-glow);
    color: white;
    text-decoration: none;
}

.landing-btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

/* Hero */
.landing-hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 40px;
    gap: 60px;
    min-height: calc(100vh - 80px);
}

.hero-content {
    flex: 1;
    max-width: 560px;
    animation: fadeInUp 0.6s ease;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: var(--radius);
    background: var(--bg-glass-strong);
    border: 1px solid var(--border-color);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 20px;
    backdrop-filter: blur(8px);
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -2px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--blurple), var(--baby-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text2 {
    background: linear-gradient(135deg, var(--baby-blue), var(--blurple-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 32px;
}

.hero-stat {
    font-size: 14px;
    color: var(--text-muted);
}

.hero-stat strong {
    display: block;
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}

/* Hero visual cards */
.hero-visual {
    flex: 1;
    max-width: 480px;
    position: relative;
    animation: fadeIn 0.8s ease;
}

.hero-card {
    background: var(--bg-glass-strong);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 16px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    animation: float 6s ease-in-out infinite;
}

.hero-card:nth-child(2) { animation-delay: -2s; }
.hero-card:nth-child(3) { animation-delay: -4s; }

.hero-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hero-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.hero-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
}

.hero-card p {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-secondary);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

/* Features section */
.landing-features {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 40px;
    text-align: center;
}

.landing-features h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 48px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-glass-strong);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 32px 24px;
    transition: var(--transition);
    text-align: left;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 16px;
    display: block;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Footer */
.landing-footer {
    text-align: center;
    padding: 32px;
    color: var(--text-muted);
    font-size: 14px;
    border-top: 1px solid var(--border-color);
}

/* Landing responsive */
@media (max-width: 900px) {
    .landing-hero {
        flex-direction: column;
        padding: 40px 20px;
        gap: 40px;
        text-align: center;
    }
    .hero-title { font-size: 40px; }
    .hero-cta { justify-content: center; }
    .hero-stats { justify-content: center; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .landing-nav { padding: 12px 16px; }
    .landing-nav .landing-btn-outline,
    .landing-nav .landing-btn-primary { display: none; }
    .hero-title { font-size: 32px; letter-spacing: -1px; }
    .hero-cta { flex-direction: column; align-items: center; }
    .hero-stats { flex-direction: column; gap: 16px; align-items: center; }
    .features-grid { grid-template-columns: 1fr; }
    .landing-features { padding: 40px 20px; }
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-glass-strong);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 12px 24px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
    box-shadow: var(--shadow-lg);
    z-index: 200;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s ease;
    opacity: 0;
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Responsive */
@media (max-width: 1024px) {
    .right-panel {
        display: none;
    }
    .app-container {
        padding: 0;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 72px;
        padding: 12px 4px;
    }
    .sidebar .logo {
        font-size: 20px;
        padding: 8px;
        text-align: center;
        justify-content: center;
    }
    .sidebar .logo .logo-text,
    .sidebar .logo span,
    .sidebar .nav-link .label,
    .sidebar .post-btn .label,
    .sidebar .sidebar-user .user-info,
    .sidebar .theme-toggle .label,
    .sidebar .nav-divider {
        display: none;
    }
    .sidebar .nav-link {
        justify-content: center;
        padding: 12px;
    }
    .sidebar .post-btn {
        padding: 12px;
        font-size: 20px;
        border-radius: 50%;
        width: 48px;
        height: 48px;
        margin: 8px auto;
    }
    .sidebar .post-btn .label {
        display: none;
    }
    .sidebar .sidebar-user {
        justify-content: center;
        padding: 8px;
    }
    .sidebar .theme-toggle {
        justify-content: center;
        padding: 8px;
    }
    .main-content {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .sidebar {
        display: none;
    }
    .main-content {
        max-width: 100%;
        border: none;
    }
}