/* ============================================================
   SecureMVC – TikTok / Instagram inspired modern UI
   Dark theme + smooth animations + mobile-first
   ============================================================ */

:root {
    --bg: #0a0a0f;
    --bg-card: #14141f;
    --bg-elevated: #1c1c2e;
    --border: rgba(255,255,255,0.08);
    --text: #f5f5f7;
    --text-muted: #8e8e9a;
    --accent: #fe2c55;
    --accent2: #25f4ee;
    --gradient: linear-gradient(135deg, #fe2c55 0%, #25f4ee 100%);
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent2); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; width: 100%; }

/* ========== Navbar ========== */
.navbar {
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    animation: slideDown 0.5s ease;
}
@keyframes slideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.brand {
    font-size: 1.4rem; font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    letter-spacing: -0.5px;
}
.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-links a {
    color: var(--text-muted); font-size: 0.9rem; font-weight: 500;
    padding: 8px 14px; border-radius: 50px; transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--bg-elevated); }
.btn-link {
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    font-size: 0.9rem; font-weight: 500; font-family: inherit;
    padding: 8px 14px; border-radius: 50px; transition: var(--transition);
}
.btn-link:hover { color: var(--accent); background: rgba(254,44,85,0.1); }

/* ========== Main ========== */
main { flex: 1; padding: 28px 0 60px; }

/* ========== Alerts ========== */
.alert {
    padding: 14px 18px; border-radius: var(--radius-sm); margin-bottom: 20px;
    font-size: 0.92rem; animation: fadeInUp 0.4s ease;
    display: flex; align-items: center; gap: 10px;
}
.alert-success { background: rgba(37,244,238,0.12); color: var(--accent2); border: 1px solid rgba(37,244,238,0.25); }
.alert-error { background: rgba(254,44,85,0.12); color: var(--accent); border: 1px solid rgba(254,44,85,0.25); }
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px; border-radius: 50px; font-size: 0.95rem; font-weight: 600;
    border: none; cursor: pointer; text-decoration: none; transition: var(--transition);
    position: relative; overflow: hidden;
}
.btn-primary {
    background: var(--gradient); color: #fff;
    box-shadow: 0 4px 20px rgba(254,44,85,0.35);
}
.btn-primary:hover {
    transform: translateY(-2px); box-shadow: 0 8px 28px rgba(254,44,85,0.45);
    color: #fff; text-decoration: none;
}
.btn-outline {
    background: transparent; border: 1.5px solid var(--border); color: var(--text);
}
.btn-outline:hover {
    border-color: var(--accent); color: var(--accent);
    background: rgba(254,44,85,0.08); text-decoration: none;
}
.btn-danger { background: var(--accent); color: #fff; }
.btn-danger:hover { background: #e0264a; transform: translateY(-1px); }
.btn-sm { padding: 7px 14px; font-size: 0.82rem; }
.btn-block { display: flex; width: 100%; }

/* ========== Hero ========== */
.hero {
    text-align: center; padding: 70px 24px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 24px; margin-bottom: 36px;
    position: relative; overflow: hidden; animation: fadeInUp 0.6s ease;
}
.hero::before {
    content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(254,44,85,0.12) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(37,244,238,0.1) 0%, transparent 50%);
    animation: pulseGlow 8s ease-in-out infinite; pointer-events: none;
}
@keyframes pulseGlow {
    0%, 100% { opacity: 0.7; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}
.hero h1 {
    font-size: 2.8rem; font-weight: 800; letter-spacing: -1.5px; margin-bottom: 14px;
    background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; position: relative;
}
.hero p {
    font-size: 1.15rem; color: var(--text-muted); margin-bottom: 28px;
    max-width: 480px; margin-left: auto; margin-right: auto; position: relative;
}
.hero-actions {
    display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative;
}

/* ========== Features ========== */
.features {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px; margin-bottom: 40px;
}
.feature-card {
    background: var(--bg-card); border: 1px solid var(--border);
    padding: 28px 24px; border-radius: var(--radius);
    transition: var(--transition); animation: fadeInUp 0.5s ease both;
}
.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:hover {
    transform: translateY(-6px); border-color: rgba(254,44,85,0.3);
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.feature-card h3 { font-size: 1.1rem; margin-bottom: 10px; font-weight: 700; }
.feature-card p { color: var(--text-muted); font-size: 0.9rem; }

/* ========== Auth Card ========== */
.auth-card {
    max-width: 420px; margin: 40px auto;
    background: var(--bg-card); border: 1px solid var(--border);
    padding: 40px 32px; border-radius: 24px; box-shadow: var(--shadow);
    animation: fadeInUp 0.5s ease;
}
.auth-card h2 { text-align: center; margin-bottom: 28px; font-size: 1.6rem; font-weight: 800; }
.auth-footer { text-align: center; margin-top: 24px; font-size: 0.9rem; color: var(--text-muted); }

/* ========== Forms ========== */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block; margin-bottom: 8px; font-weight: 600; font-size: 0.85rem;
    color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px;
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="file"] {
    width: 100%; padding: 14px 16px;
    background: var(--bg-elevated); border: 1.5px solid var(--border);
    border-radius: var(--radius-sm); font-size: 0.95rem; color: var(--text);
    transition: var(--transition); font-family: inherit;
}
.form-group input:focus {
    outline: none; border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(254,44,85,0.15);
}
.form-group input::placeholder { color: var(--text-muted); }
.form-group small { color: var(--text-muted); font-size: 0.8rem; margin-top: 6px; display: block; }

/* ========== Cards & Stats ========== */
.page-header { margin-bottom: 28px; animation: fadeInUp 0.4s ease; }
.page-header h1 { font-size: 1.9rem; font-weight: 800; letter-spacing: -0.5px; }
.page-header p { color: var(--text-muted); margin-top: 4px; }
.card {
    background: var(--bg-card); border: 1px solid var(--border);
    padding: 24px; border-radius: var(--radius); margin-bottom: 24px;
    animation: fadeInUp 0.5s ease;
}
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.card-header h3 { font-weight: 700; }
.stats-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px; margin-bottom: 28px;
}
.stat-card {
    background: var(--bg-card); border: 1px solid var(--border);
    padding: 24px 20px; border-radius: var(--radius); text-align: center;
    transition: var(--transition); animation: fadeInUp 0.5s ease both;
}
.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:hover { transform: translateY(-4px); border-color: rgba(37,244,238,0.3); }
.stat-card h3 {
    font-size: 0.8rem; color: var(--text-muted); margin-bottom: 8px;
    text-transform: uppercase; letter-spacing: 0.8px; font-weight: 600;
}
.stat-value {
    font-size: 1.7rem; font-weight: 800;
    background: var(--gradient); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.actions { display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap; }

/* ========== Table ========== */
.table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.table th, .table td { padding: 14px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.table th {
    font-weight: 600; color: var(--text-muted); font-size: 0.75rem;
    text-transform: uppercase; letter-spacing: 0.6px;
}
.table tr { transition: var(--transition); }
.table tbody tr:hover { background: rgba(255,255,255,0.03); }
.table-avatar {
    width: 40px; height: 40px; border-radius: 50%; object-fit: cover;
    border: 2px solid var(--border);
}
.table-avatar-placeholder {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--gradient); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.95rem;
}
.actions-cell { white-space: nowrap; }

/* ========== Badges ========== */
.badge {
    display: inline-block; padding: 4px 12px; border-radius: 50px;
    font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.4px;
}
.badge-admin { background: rgba(254,44,85,0.15); color: var(--accent); }
.badge-user { background: rgba(37,244,238,0.15); color: var(--accent2); }
.badge-success { background: rgba(37,244,238,0.15); color: var(--accent2); }
.badge-danger { background: rgba(254,44,85,0.15); color: var(--accent); }

/* ========== Profile ========== */
.profile-avatar { text-align: center; margin-bottom: 28px; }
.avatar-img {
    width: 110px; height: 110px; border-radius: 50%; object-fit: cover;
    border: 3px solid transparent; background: var(--gradient) border-box;
    box-shadow: 0 0 0 3px var(--bg-card), 0 8px 24px rgba(254,44,85,0.25);
    animation: fadeInUp 0.5s ease;
}
.avatar-placeholder {
    width: 110px; height: 110px; border-radius: 50%;
    background: var(--gradient); color: #fff;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 2.8rem; font-weight: 800;
    box-shadow: 0 8px 24px rgba(254,44,85,0.3);
}

/* ========== Footer ========== */
.footer {
    background: var(--bg-card); border-top: 1px solid var(--border);
    color: var(--text-muted); text-align: center; padding: 22px 0;
    font-size: 0.85rem; margin-top: auto;
}

/* ========== 404 ========== */
.error-page { text-align: center; padding: 120px 20px; animation: fadeInUp 0.5s ease; }
.error-page h1 {
    font-size: 7rem; font-weight: 900; line-height: 1;
    background: var(--gradient); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.error-page p { font-size: 1.2rem; color: var(--text-muted); margin: 16px 0 28px; }
.text-muted { color: var(--text-muted); font-size: 0.85rem; }

/* ========== Responsive ========== */
@media (max-width: 640px) {
    .nav-links { gap: 4px; }
    .nav-links a, .btn-link { padding: 6px 10px; font-size: 0.82rem; }
    .hero { padding: 48px 18px; }
    .hero h1 { font-size: 2rem; }
    .auth-card { padding: 28px 20px; margin: 20px auto; }
    .table { font-size: 0.8rem; }
    .table th, .table td { padding: 10px 8px; }
    .actions-cell form { display: block; margin-bottom: 6px; }
    .page-header h1 { font-size: 1.5rem; }
}