:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #8b5cf6;
    --dark: #0f172a;
    --darker: #020617;
    --card: #1e293b;
    --card-hover: #334155;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border: #334155;
    --radius: 10px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--darker);
    color: var(--text);
    line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* NAVBAR */
.navbar {
    background: var(--dark);
    border-bottom: 1px solid var(--border);
    padding: 0 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 65px;
}
.navbar .logo {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.5px;
}
.navbar .logo span { color: var(--primary); }
.nav-links { display: flex; gap: 5px; align-items: center; }
.nav-links a {
    color: var(--muted);
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    transition: all .2s;
}
.nav-links a:hover, .nav-links a.active { color: #fff; background: var(--card); }
.nav-links .btn-nav {
    background: var(--primary);
    color: #fff;
    padding: 8px 20px;
    border-radius: var(--radius);
    font-weight: 600;
}
.nav-links .btn-nav:hover { background: var(--primary-dark); }

.hamburger { display: none; cursor: pointer; font-size: 24px; color: #fff; background: none; border: none; }

/* HERO */
.hero {
    background: linear-gradient(135deg, var(--dark) 0%, #1a1a2e 50%, var(--dark) 100%);
    padding: 100px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(59,130,246,0.15), transparent 70%);
    top: -200px; right: -100px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { font-size: 48px; font-weight: 800; margin-bottom: 16px; line-height: 1.2; }
.hero h1 span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 18px; color: var(--muted); max-width: 600px; margin: 0 auto 30px; }

/* BUTTONS */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: all .2s;
    text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); }
.btn-secondary { background: var(--card); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--card-hover); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: .9; color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .9; color: #fff; }
.btn-warning { background: var(--warning); color: #000; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-block { display: block; width: 100%; }

/* CARDS */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all .3s;
}
.card:hover { border-color: var(--primary); transform: translateY(-2px); }

/* PACKAGES */
.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    padding: 60px 0;
}
.package-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    position: relative;
    transition: all .3s;
}
.package-card:hover { border-color: var(--primary); transform: translateY(-4px); }
.package-card.popular { border-color: var(--primary); }
.package-card.popular::before {
    content: 'Populer';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
}
.package-card h3 { font-size: 20px; margin-bottom: 8px; }
.package-card .price { font-size: 36px; font-weight: 800; color: var(--primary); margin: 16px 0; }
.package-card .price small { font-size: 14px; color: var(--muted); font-weight: 400; }
.package-card .features { list-style: none; margin: 20px 0; text-align: left; }
.package-card .features li { padding: 8px 0; border-bottom: 1px solid var(--border); color: var(--muted); font-size: 14px; }
.package-card .features li::before { content: '✓'; color: var(--success); margin-right: 8px; font-weight: bold; }

/* SECTION */
.section { padding: 60px 0; }
.section-title { text-align: center; margin-bottom: 40px; }
.section-title h2 { font-size: 32px; font-weight: 800; margin-bottom: 8px; }
.section-title p { color: var(--muted); font-size: 16px; }

/* FEATURES */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}
.feature-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    transition: all .3s;
}
.feature-card:hover { border-color: var(--primary); }
.feature-card .icon { font-size: 40px; margin-bottom: 16px; }
.feature-card h3 { margin-bottom: 8px; font-size: 18px; }
.feature-card p { color: var(--muted); font-size: 14px; }

/* FORMS */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 14px; color: var(--muted); }
.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--darker);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    transition: border .2s;
}
.form-control:focus { outline: none; border-color: var(--primary); }
select.form-control { appearance: none; }
textarea.form-control { resize: vertical; min-height: 100px; }

/* ALERT */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 14px;
    font-weight: 500;
}
.alert-success { background: rgba(34,197,94,0.15); color: var(--success); border: 1px solid rgba(34,197,94,0.3); }
.alert-danger { background: rgba(239,68,68,0.15); color: var(--danger); border: 1px solid rgba(239,68,68,0.3); }
.alert-warning { background: rgba(245,158,11,0.15); color: var(--warning); border: 1px solid rgba(245,158,11,0.3); }

/* TABLE */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
table th, table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
table th { color: var(--muted); font-weight: 600; background: var(--darker); }
table tr:hover { background: rgba(59,130,246,0.05); }

/* BADGE */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}
.badge-success { background: rgba(34,197,94,0.2); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.2); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.2); color: var(--danger); }
.badge-info { background: rgba(59,130,246,0.2); color: var(--primary); }

/* AUTH FORM */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.auth-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
}
.auth-box h2 { text-align: center; margin-bottom: 24px; font-size: 24px; }

/* PANEL LAYOUT */
.panel-wrap { display: flex; min-height: 100vh; }
.sidebar {
    width: 260px;
    background: var(--dark);
    border-right: 1px solid var(--border);
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
}
.sidebar .logo-area { padding: 0 20px 20px; border-bottom: 1px solid var(--border); margin-bottom: 10px; }
.sidebar .logo-area h2 { font-size: 18px; }
.sidebar .logo-area h2 span { color: var(--primary); }
.sidebar .logo-area small { color: var(--muted); font-size: 12px; }
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 500;
    transition: all .2s;
    border-left: 3px solid transparent;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
    color: #fff;
    background: rgba(59,130,246,0.1);
    border-left-color: var(--primary);
}
.sidebar-nav .divider { height: 1px; background: var(--border); margin: 10px 20px; }

.panel-content { margin-left: 260px; flex: 1; padding: 30px; min-height: 100vh; }
.panel-header { margin-bottom: 24px; }
.panel-header h1 { font-size: 24px; font-weight: 700; }
.panel-header p { color: var(--muted); font-size: 14px; }

/* STAT CARDS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}
.stat-card .label { color: var(--muted); font-size: 13px; font-weight: 500; }
.stat-card .value { font-size: 28px; font-weight: 800; margin-top: 4px; }
.stat-card .icon { font-size: 28px; float: right; }

/* FOOTER */
.footer {
    background: var(--dark);
    border-top: 1px solid var(--border);
    padding: 40px 0 20px;
    margin-top: 60px;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}
.footer h4 { margin-bottom: 16px; font-size: 16px; }
.footer p, .footer a { color: var(--muted); font-size: 14px; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 8px; }
.footer ul li a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 20px; text-align: center; color: var(--muted); font-size: 13px; }

/* WHATSAPP FAB */
.whatsapp-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 28px;
    box-shadow: 0 4px 20px rgba(37,211,102,0.4);
    z-index: 9999;
    transition: transform .2s;
}
.whatsapp-fab:hover { transform: scale(1.1); color: #fff; }

/* MODAL */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 5000;
    align-items: center;
    justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 30px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}
.modal-box h3 { margin-bottom: 16px; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .hero h1 { font-size: 28px; }
    .hero p { font-size: 15px; }
    .nav-links { display: none; position: absolute; top: 65px; left: 0; right: 0; background: var(--dark); flex-direction: column; padding: 20px; border-bottom: 1px solid var(--border); }
    .nav-links.open { display: flex; }
    .hamburger { display: block; }
    .sidebar { transform: translateX(-100%); transition: transform .3s; }
    .sidebar.open { transform: translateX(0); }
    .panel-content { margin-left: 0; padding: 20px; }
    .packages-grid { grid-template-columns: 1fr; }
}

/* MISC */
.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.d-flex { display: flex; }
.gap-2 { gap: 16px; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }