/* ============================================================
   Rui Codex AI — Design System
   ============================================================ */
:root {
    --sidebar-w: 260px;
    --sidebar-w-collapsed: 68px;
    --topbar-h: 56px;
    --subnav-h: 42px;

    --sidebar-bg: #0f172a;
    --sidebar-hover: rgba(255,255,255,.06);
    --sidebar-active: rgba(99,102,241,.15);
    --sidebar-text: #94a3b8;
    --sidebar-text-active: #fff;
    --sidebar-section: #475569;
    --sidebar-border: rgba(255,255,255,.06);

    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #eef2ff;
    --primary-soft: rgba(99,102,241,.1);
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;

    --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;

    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;

    --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
    --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -1px rgba(0,0,0,.04);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -2px rgba(0,0,0,.04);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,.08), 0 10px 10px -5px rgba(0,0,0,.03);

    --radius-sm: .375rem;
    --radius: .5rem;
    --radius-lg: .75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition: .15s cubic-bezier(.4,0,.2,1);
}

/* Google Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

*, *::before, *::after { box-sizing: border-box; }
body {
    margin: 0; font-family: var(--font); background: var(--bg);
    color: var(--text); font-size: .875rem; line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

.app-wrapper { display: flex; min-height: 100vh; }

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
    width: var(--sidebar-w); background: var(--sidebar-bg);
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 1000;
    overflow-y: auto; overflow-x: hidden;
    transition: width .25s cubic-bezier(.4,0,.2,1);
    display: flex; flex-direction: column;
    scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.1) transparent;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.1); border-radius: 4px; }

.sidebar.collapsed { width: var(--sidebar-w-collapsed); }
.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .nav-section-title { display: none; }
.sidebar.collapsed .sidebar-brand { justify-content: center; padding: 16px 0; }
.sidebar.collapsed .nav-item .nav-link { justify-content: center; padding: 12px 0; }
.sidebar.collapsed .nav-item .nav-link i { margin: 0; }

.sidebar-brand {
    display: flex; align-items: center; gap: 12px;
    padding: 18px 22px; border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}
.sidebar-brand .brand-icon {
    width: 34px; height: 34px; border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 1rem; font-weight: 700; flex-shrink: 0;
}
.brand-text { font-size: 1.05rem; font-weight: 700; color: #fff; white-space: nowrap; }

.sidebar-nav { list-style: none; padding: 8px 0; margin: 0; flex: 1; }
.sidebar-nav .nav-section-title {
    font-size: .65rem; letter-spacing: .1em; color: var(--sidebar-section);
    padding: 18px 22px 6px; text-transform: uppercase; font-weight: 600;
    white-space: nowrap;
}
.sidebar-nav .nav-item .nav-link {
    display: flex; align-items: center; gap: 12px;
    padding: 9px 22px; color: var(--sidebar-text);
    text-decoration: none; font-size: .8125rem; font-weight: 500;
    transition: all var(--transition); border-radius: 0;
    margin: 1px 8px; border-radius: var(--radius);
    white-space: nowrap;
}
.sidebar-nav .nav-item .nav-link i {
    width: 20px; text-align: center; font-size: .9rem;
    flex-shrink: 0; transition: color var(--transition);
}
.sidebar-nav .nav-item .nav-link:hover {
    background: var(--sidebar-hover); color: #e2e8f0;
}
.sidebar-nav .nav-item.active .nav-link {
    background: var(--sidebar-active); color: var(--sidebar-text-active);
}
.sidebar-nav .nav-item.active .nav-link i { color: var(--primary); }

.sidebar-nav .nav-item.disabled .nav-link {
    opacity: .4; cursor: default; pointer-events: none;
}
.nav-soon {
    margin-left: auto; font-size: .58rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .06em; background: rgba(255,255,255,.08); color: var(--sidebar-section);
    padding: 2px 6px; border-radius: 3px; line-height: 1;
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main-content {
    margin-left: var(--sidebar-w); flex: 1;
    display: flex; flex-direction: column; min-height: 100vh;
    transition: margin-left .25s cubic-bezier(.4,0,.2,1);
}
.sidebar.collapsed ~ .main-content { margin-left: var(--sidebar-w-collapsed); }

/* ============================================================
   TOP BAR
   ============================================================ */
.top-bar {
    height: var(--topbar-h); background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex; align-items: center; padding: 0 24px; gap: 16px;
    position: sticky; top: 0; z-index: 100;
    backdrop-filter: blur(12px); background: rgba(255,255,255,.92);
}
.sidebar-toggle {
    width: 36px; height: 36px; border: none; background: none;
    border-radius: var(--radius); color: var(--gray-500);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; transition: all var(--transition); font-size: 1rem;
}
.sidebar-toggle:hover { background: var(--gray-100); color: var(--gray-700); }

.top-bar-search {
    display: flex; align-items: center; gap: 10px;
    background: var(--gray-100); border-radius: var(--radius-lg);
    padding: 0 14px; flex: 1; max-width: 420px;
    border: 1px solid transparent; transition: all var(--transition);
    position: relative;
}
.top-bar-search:focus-within {
    background: var(--surface); border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,.1);
}
.top-bar-search i { color: var(--gray-400); font-size: .8rem; }
.top-bar-search .form-control {
    border: none; background: transparent; box-shadow: none;
    font-size: .8125rem; padding: 8px 0; color: var(--text);
}
.top-bar-search .form-control::placeholder { color: var(--gray-400); }

.search-results {
    position: absolute; top: calc(100% + 6px); left: 0; right: 0;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
    display: none; z-index: 200; max-height: 320px; overflow-y: auto;
}
.search-results.show { display: block; }
.search-results .sr-item {
    display: flex; align-items: center; gap: .6rem;
    padding: .6rem 1rem; cursor: pointer; text-decoration: none;
    color: var(--text); font-size: .8rem; transition: background .1s;
}
.search-results .sr-item:hover { background: var(--gray-50); }
.search-results .sr-item i { width: 18px; text-align: center; color: var(--gray-400); font-size: .75rem; }
.search-results .sr-item span { font-weight: 500; }
.search-results .sr-empty {
    padding: 1.5rem; text-align: center; color: var(--gray-400); font-size: .8rem;
}

.top-bar-right { display: flex; align-items: center; gap: 4px; margin-left: auto; position: relative; z-index: 10; }
.top-bar-right > .dropdown { position: relative; }
.top-bar-right .btn-link {
    width: 36px; height: 36px; border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    color: var(--gray-500); text-decoration: none; transition: all var(--transition);
    position: relative; padding: 0; flex-shrink: 0;
}
.top-bar-right .btn-link.user-menu { width: auto; height: auto; }
.top-bar-right .btn-link:hover { background: var(--gray-100); color: var(--gray-700); }
.notification-dot {
    position: absolute; top: 6px; right: 6px; width: 7px; height: 7px;
    border-radius: 50%; background: var(--danger); border: 1.5px solid #fff;
}

.user-menu {
    display: flex; align-items: center; gap: 8px; color: var(--text);
    text-decoration: none; padding: 4px 8px 4px 4px; border-radius: var(--radius-lg);
    transition: background var(--transition); cursor: pointer;
    overflow: hidden;
}
.user-menu:hover { background: var(--gray-100); }
.user-avatar {
    width: 32px; height: 32px; border-radius: var(--radius);
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: .75rem; font-weight: 700;
}
.user-name { font-weight: 600; font-size: .8125rem; color: var(--gray-700); }
.user-role { font-size: .7rem; color: var(--gray-400); }

/* ============================================================
   SUB NAVIGATION
   ============================================================ */
.sub-nav {
    height: var(--subnav-h); background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex; align-items: center; padding: 0 24px; gap: 2px;
}
.sub-nav-item {
    padding: 6px 14px; color: var(--gray-500); text-decoration: none;
    font-size: .8rem; font-weight: 500; border-radius: var(--radius);
    transition: all var(--transition); display: flex; align-items: center; gap: 6px;
}
.sub-nav-item i { font-size: .75rem; }
.sub-nav-item:hover { color: var(--primary); background: var(--primary-soft); }
.sub-nav-item.active {
    color: var(--primary); background: var(--primary-soft); font-weight: 600;
}

/* ============================================================
   PAGE CONTENT
   ============================================================ */
.page-content { padding: 24px; flex: 1; }

/* ============================================================
   CARDS
   ============================================================ */
.card {
    border: 1px solid var(--border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xs); background: var(--surface);
    transition: box-shadow var(--transition);
}
.card:hover { box-shadow: var(--shadow-sm); }
.card-header {
    background: var(--surface); border-bottom: 1px solid var(--border);
    font-weight: 600; padding: 14px 20px; font-size: .85rem;
}

/* ============================================================
   STATUS BADGES
   ============================================================ */
.status-badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px; border-radius: 2rem; font-size: .7rem;
    font-weight: 600; letter-spacing: .02em;
}
.status-badge.active { background: var(--success-light); color: #065f46; }
.status-badge.expired { background: var(--warning-light); color: #92400e; }
.status-badge.error, .status-badge.failed { background: var(--danger-light); color: #991b1b; }
.status-badge.draft { background: var(--gray-100); color: var(--gray-600); }
.status-badge.scheduled { background: var(--info-light); color: #1e40af; }
.status-badge.published { background: var(--success-light); color: #065f46; }
.status-badge .dot {
    width: 6px; height: 6px; border-radius: 50%; background: currentColor;
}

/* ============================================================
   PLATFORM ICONS
   ============================================================ */
.platform-icon {
    width: 36px; height: 36px; border-radius: var(--radius-lg);
    display: inline-flex; align-items: center; justify-content: center;
    color: #fff; font-size: .85rem; flex-shrink: 0;
}
.platform-icon.sm { width: 28px; height: 28px; font-size: .7rem; border-radius: var(--radius); }
.platform-icon.lg { width: 48px; height: 48px; font-size: 1.1rem; }
.platform-icon.xl { width: 56px; height: 56px; font-size: 1.3rem; border-radius: var(--radius-xl); }
.platform-icon.facebook { background: #1877f2; }
.platform-icon.instagram { background: linear-gradient(135deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888); }
.platform-icon.linkedin { background: #0a66c2; }
.platform-icon.youtube { background: #ff0000; }
.platform-icon.tiktok { background: #010101; }
.platform-icon.pinterest { background: #e60023; }
.platform-icon.gbp { background: #4285f4; }

/* ============================================================
   STAT CARDS
   ============================================================ */
.stat-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 1.25rem;
    display: flex; align-items: flex-start; gap: 1rem;
    transition: all var(--transition); position: relative; overflow: hidden;
}
.stat-card:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
.stat-card .stat-icon {
    width: 44px; height: 44px; border-radius: var(--radius-lg);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; flex-shrink: 0;
}
.stat-card .stat-info { flex: 1; }
.stat-card .stat-label { font-size: .75rem; color: var(--gray-500); font-weight: 500; margin-bottom: .15rem; }
.stat-card .stat-value { font-size: 1.5rem; font-weight: 800; color: var(--text); line-height: 1.2; }
.stat-card .stat-change {
    font-size: .7rem; font-weight: 600; margin-top: .25rem;
    display: inline-flex; align-items: center; gap: .2rem;
}
.stat-card .stat-change.up { color: var(--success); }
.stat-card .stat-change.down { color: var(--danger); }

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
    text-align: center; padding: 3rem 1.5rem;
}
.empty-state .empty-icon {
    width: 80px; height: 80px; border-radius: 50%;
    background: var(--gray-100); display: flex; align-items: center;
    justify-content: center; margin: 0 auto 1.25rem; font-size: 2rem; color: var(--gray-300);
}
.empty-state h5 { font-weight: 700; color: var(--gray-700); margin-bottom: .35rem; }
.empty-state p { color: var(--gray-500); font-size: .85rem; max-width: 360px; margin: 0 auto .75rem; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary-custom {
    background: var(--primary); color: #fff; border: none;
    padding: .5rem 1.25rem; border-radius: var(--radius);
    font-size: .8125rem; font-weight: 600; cursor: pointer;
    transition: all var(--transition); display: inline-flex;
    align-items: center; gap: .4rem;
}
.btn-primary-custom:hover { background: var(--primary-hover); box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.btn-outline-custom {
    background: var(--surface); color: var(--gray-600); border: 1px solid var(--border);
    padding: .5rem 1.25rem; border-radius: var(--radius);
    font-size: .8125rem; font-weight: 500; cursor: pointer;
    transition: all var(--transition); display: inline-flex;
    align-items: center; gap: .4rem;
}
.btn-outline-custom:hover { background: var(--gray-50); border-color: var(--gray-300); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.animate-in { animation: fadeInUp .4s ease both; }
.animate-in-1 { animation-delay: .05s; }
.animate-in-2 { animation-delay: .1s; }
.animate-in-3 { animation-delay: .15s; }
.animate-in-4 { animation-delay: .2s; }
.animate-in-5 { animation-delay: .25s; }

/* ============================================================
   APP FOOTER
   ============================================================ */
.app-footer {
    margin-top: 3rem; padding: 1.5rem 0;
    border-top: 1px solid var(--border); text-align: center;
    font-size: .75rem; color: var(--gray-400);
    display: flex; align-items: center; justify-content: center;
    gap: .35rem; flex-wrap: wrap;
}
.app-footer a {
    color: var(--gray-500); text-decoration: none; font-weight: 500;
    transition: color .2s;
}
.app-footer a:hover { color: var(--primary); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
/* Sidebar Overlay (mobile) */
.sidebar-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.4);
    z-index: 999; display: none; backdrop-filter: blur(2px);
    transition: opacity .25s;
}
.sidebar-overlay.show { display: block; }

@media (max-width: 991px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.show { transform: translateX(0); }
    .main-content { margin-left: 0 !important; }
}
@media (max-width: 768px) {
    .page-content { padding: 16px; }
    .top-bar { padding: 0 16px; }
    .sub-nav { padding: 0 16px; overflow-x: auto; }
}