@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #0ea5e9;
  --accent: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --dark: #0f172a;
  --dark2: #1e293b;
  --dark3: #334155;
  --muted: #64748b;
  --border: rgba(148,163,184,0.15);
  --glass: rgba(255,255,255,0.05);
  --glass-hover: rgba(255,255,255,0.08);
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --glow: 0 0 40px rgba(99,102,241,0.3);
  --radius: 16px;
  --radius-sm: 10px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--dark);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Animated Background ────────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse 80% 60% at 10% 10%, rgba(99,102,241,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(14,165,233,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(16,185,129,0.05) 0%, transparent 70%),
    var(--dark);
}

/* ── Navbar ─────────────────────────────────────────────── */
.navbar {
  position: sticky; top: 0; z-index: 100;
  padding: 16px 32px;
  background: rgba(15,23,42,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.navbar-brand {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none;
}
.navbar-logo {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800; color: #fff;
}
.navbar-name { font-size: 18px; font-weight: 700; color: var(--text); }
.navbar-badge {
  font-size: 11px; font-weight: 600; padding: 2px 8px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 20px; color: #fff;
}
.btn-nav {
  padding: 9px 20px; border-radius: 10px; font-size: 14px; font-weight: 600;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; text-decoration: none; border: none; cursor: pointer;
  transition: all 0.2s; box-shadow: 0 4px 15px rgba(99,102,241,0.3);
}
.btn-nav:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(99,102,241,0.4); }

/* ── Hero ───────────────────────────────────────────────── */
.hero {
  text-align: center; padding: 100px 24px 60px;
  max-width: 900px; margin: 0 auto;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 100px; margin-bottom: 28px;
  background: rgba(99,102,241,0.15); border: 1px solid rgba(99,102,241,0.3);
  font-size: 13px; font-weight: 600; color: var(--primary-light);
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px); font-weight: 900; line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 0%, var(--primary-light) 50%, var(--secondary) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { font-size: 18px; color: var(--text-dim); max-width: 600px; margin: 0 auto 40px; }

/* ── Pricing Toggle ─────────────────────────────────────── */
.billing-toggle {
  display: inline-flex; align-items: center; gap: 16px;
  margin-bottom: 60px; padding: 6px; border-radius: 100px;
  background: var(--dark2); border: 1px solid var(--border);
}
.billing-toggle button {
  padding: 8px 20px; border-radius: 100px; border: none; cursor: pointer;
  font-size: 14px; font-weight: 600; transition: all 0.2s; background: transparent; color: var(--muted);
}
.billing-toggle button.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; box-shadow: 0 4px 15px rgba(99,102,241,0.3);
}
.yearly-badge {
  font-size: 11px; font-weight: 700; padding: 3px 8px;
  background: linear-gradient(135deg, var(--accent), #059669);
  border-radius: 100px; color: #fff;
}

/* ── Pricing Cards ──────────────────────────────────────── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px; max-width: 1100px; margin: 0 auto; padding: 0 24px 80px;
}
.pricing-card {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px;
  transition: all 0.3s; position: relative; overflow: hidden;
  cursor: pointer;
}
.pricing-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.pricing-card:hover {
  background: var(--glass-hover); border-color: rgba(99,102,241,0.3);
  transform: translateY(-4px); box-shadow: var(--glow);
}
.pricing-card:hover::before { opacity: 1; }

.pricing-card.featured {
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(14,165,233,0.08));
  border-color: rgba(99,102,241,0.4);
  box-shadow: var(--glow);
}
.pricing-card.featured::before { opacity: 1; }

.plan-badge {
  position: absolute; top: 20px; right: 20px;
  font-size: 11px; font-weight: 700; padding: 4px 12px; border-radius: 100px;
  background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff;
}
.plan-name { font-size: 22px; font-weight: 800; margin-bottom: 8px; }
.plan-desc { font-size: 14px; color: var(--text-dim); margin-bottom: 28px; }
.plan-price { margin-bottom: 28px; }
.plan-price .amount {
  font-size: 42px; font-weight: 900;
  background: linear-gradient(135deg, #fff, var(--primary-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.plan-price .period { font-size: 15px; color: var(--text-dim); margin-left: 4px; }
.plan-price .original { font-size: 14px; color: var(--muted); text-decoration: line-through; margin-top: 4px; }

.features-list { list-style: none; margin-bottom: 32px; }
.features-list li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 0; font-size: 14px; border-bottom: 1px solid var(--border);
}
.features-list li:last-child { border: none; }
.feature-icon { font-size: 16px; flex-shrink: 0; }
.feature-off { color: var(--muted); }

.btn-plan {
  width: 100%; padding: 14px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 700; border: none; cursor: pointer;
  transition: all 0.2s; text-decoration: none; display: block; text-align: center;
}
.btn-plan-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; box-shadow: 0 4px 20px rgba(99,102,241,0.35);
}
.btn-plan-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(99,102,241,0.45); }
.btn-plan-outline {
  background: transparent; border: 1.5px solid var(--border);
  color: var(--text);
}
.btn-plan-outline:hover { border-color: var(--primary); color: var(--primary-light); }

/* ── User Slider ─────────────────────────────────────────── */
.calculator-section {
  max-width: 780px; margin: 0 auto 80px; padding: 0 24px;
}
.calc-card {
  background: var(--dark2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px;
}
.calc-title { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.calc-subtitle { color: var(--text-dim); font-size: 14px; margin-bottom: 32px; }

.slider-row { margin-bottom: 28px; }
.slider-label {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.slider-label span { font-size: 14px; font-weight: 600; color: var(--text-dim); }
.slider-label .value {
  font-size: 20px; font-weight: 800; color: var(--primary-light);
}

input[type=range] {
  width: 100%; height: 6px; border-radius: 100px;
  background: var(--dark3); outline: none; -webkit-appearance: none; cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  cursor: pointer; box-shadow: 0 0 10px rgba(99,102,241,0.5); transition: transform 0.1s;
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.15); }

.addons-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px; margin-bottom: 28px;
}
.addon-toggle {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; border-radius: var(--radius-sm);
  background: var(--glass); border: 1.5px solid var(--border);
  cursor: pointer; transition: all 0.2s; user-select: none;
}
.addon-toggle:hover { border-color: rgba(99,102,241,0.4); background: var(--glass-hover); }
.addon-toggle.active {
  background: rgba(99,102,241,0.12); border-color: rgba(99,102,241,0.5);
}
.addon-toggle input[type=checkbox] { display: none; }
.addon-check {
  width: 20px; height: 20px; border-radius: 6px; border: 2px solid var(--dark3);
  background: var(--dark3); display: flex; align-items: center; justify-content: center;
  font-size: 12px; transition: all 0.2s; flex-shrink: 0;
}
.addon-toggle.active .addon-check {
  background: linear-gradient(135deg, var(--primary), var(--secondary)); border-color: transparent;
}
.addon-info { flex: 1; }
.addon-name { font-size: 13px; font-weight: 600; }
.addon-price { font-size: 11px; color: var(--text-dim); margin-top: 2px; }

.price-summary {
  background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(14,165,233,0.1));
  border: 1px solid rgba(99,102,241,0.3); border-radius: var(--radius-sm);
  padding: 24px; display: flex; align-items: center; justify-content: space-between;
  gap: 20px; flex-wrap: wrap;
}
.price-breakdown { flex: 1; }
.price-breakdown .label { font-size: 13px; color: var(--text-dim); margin-bottom: 4px; }
.price-breakdown .total {
  font-size: 36px; font-weight: 900;
  background: linear-gradient(135deg, #fff, var(--primary-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.price-breakdown .per-user { font-size: 12px; color: var(--text-dim); margin-top: 4px; }

.btn-cta {
  padding: 16px 36px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; font-size: 16px; font-weight: 700; border: none; cursor: pointer;
  transition: all 0.25s; box-shadow: 0 6px 25px rgba(99,102,241,0.4);
  white-space: nowrap;
}
.btn-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(99,102,241,0.5); }

/* ── Checkout Page ──────────────────────────────────────── */
.checkout-page {
  min-height: 100vh; display: flex; align-items: flex-start;
  justify-content: center; padding: 60px 24px;
}
.checkout-container {
  width: 100%; max-width: 1000px;
  display: grid; grid-template-columns: 1fr 420px; gap: 32px; align-items: start;
}
@media (max-width: 768px) {
  .checkout-container { grid-template-columns: 1fr; }
}
.checkout-form-card, .checkout-summary-card {
  background: var(--dark2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px;
}
.checkout-title { font-size: 24px; font-weight: 800; margin-bottom: 28px; }
.form-group { margin-bottom: 20px; }
.form-label {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--text-dim); margin-bottom: 8px; letter-spacing: 0.02em;
}
.form-input {
  width: 100%; padding: 12px 16px; border-radius: var(--radius-sm);
  background: var(--dark3); border: 1.5px solid transparent;
  color: var(--text); font-size: 15px; font-family: inherit;
  transition: all 0.2s; outline: none;
}
.form-input:focus { border-color: var(--primary); background: rgba(99,102,241,0.08); }
.form-input::placeholder { color: var(--muted); }
.form-input.error { border-color: var(--danger); }
.form-input.success { border-color: var(--accent); }

.subdomain-wrapper { position: relative; display: flex; align-items: center; }
.subdomain-prefix, .subdomain-suffix {
  padding: 12px 14px; background: var(--dark); border: 1.5px solid var(--border);
  font-size: 14px; color: var(--muted); white-space: nowrap; flex-shrink: 0;
}
.subdomain-prefix { border-radius: var(--radius-sm) 0 0 var(--radius-sm); border-right: none; }
.subdomain-suffix { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; border-left: none; }
.subdomain-input {
  flex: 1; border-radius: 0; border-left: none; border-right: none;
}
.subdomain-status {
  position: absolute; right: 165px; font-size: 18px;
  display: flex; align-items: center;
}
.subdomain-hint {
  font-size: 12px; margin-top: 6px; min-height: 18px; padding-left: 2px;
  transition: all 0.2s;
}
.hint-ok { color: var(--accent); }
.hint-error { color: var(--danger); }
.hint-loading { color: var(--text-dim); }

/* ── QR Payment Modal ───────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.75); backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center; padding: 24px;
  opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-box {
  background: var(--dark2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px; max-width: 500px; width: 100%;
  transform: scale(0.95); transition: transform 0.3s;
  text-align: center;
}
.modal-overlay.open .modal-box { transform: scale(1); }

.qr-container {
  margin: 24px auto;
  width: 220px; height: 220px; border-radius: var(--radius-sm);
  background: #fff; display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  box-shadow: 0 0 0 4px rgba(99,102,241,0.3), 0 0 30px rgba(99,102,241,0.2);
}
.qr-container img { width: 100%; height: 100%; object-fit: contain; }

.payment-countdown {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 14px; color: var(--text-dim); margin-bottom: 20px;
}
.countdown-value {
  font-size: 22px; font-weight: 800; color: var(--warning);
  min-width: 50px; font-variant-numeric: tabular-nums;
}

.payment-steps { margin: 20px 0; text-align: left; }
.payment-step {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 0; font-size: 13px; border-bottom: 1px solid var(--border);
}
.payment-step:last-child { border: none; }
.step-icon { width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 12px; }
.step-pending { background: var(--dark3); color: var(--muted); }
.step-running { background: rgba(245,158,11,0.2); color: var(--warning); animation: pulse 1.5s infinite; }
.step-success { background: rgba(16,185,129,0.2); color: var(--accent); }
.step-failed { background: rgba(239,68,68,0.2); color: var(--danger); }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

.bank-info {
  background: var(--dark3); border-radius: var(--radius-sm); padding: 16px;
  text-align: left; margin: 16px 0;
}
.bank-row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; font-size: 13px; }
.bank-row .bk { color: var(--text-dim); }
.bank-row .bv { font-weight: 600; color: var(--text); }
.bank-row .order-code { font-family: monospace; font-size: 15px; font-weight: 700; color: var(--primary-light); letter-spacing: 2px; }

/* ── Admin Page ─────────────────────────────────────────── */
.admin-page { padding: 40px 24px; max-width: 1200px; margin: 0 auto; }
.admin-header { margin-bottom: 32px; }
.admin-header h1 { font-size: 28px; font-weight: 800; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 32px; }
.stat-card {
  background: var(--dark2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 24px;
}
.stat-value { font-size: 36px; font-weight: 900; color: var(--primary-light); }
.stat-label { font-size: 13px; color: var(--text-dim); margin-top: 4px; }

.table-card { background: var(--dark2); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.table-header { padding: 20px 24px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
table { width: 100%; border-collapse: collapse; }
th { padding: 12px 16px; text-align: left; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-dim); border-bottom: 1px solid var(--border); }
td { padding: 14px 16px; font-size: 14px; border-bottom: 1px solid rgba(148,163,184,0.08); }
tr:last-child td { border: none; }
tr:hover td { background: var(--glass); }

.badge {
  display: inline-block; padding: 3px 10px; border-radius: 100px; font-size: 11px; font-weight: 700;
}
.badge-pending { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-active { background: rgba(16,185,129,0.15); color: var(--accent); }
.badge-expired { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-suspended { background: rgba(148,163,184,0.15); color: var(--muted); }

/* ── Utilities ─────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.text-dim { color: var(--text-dim); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.gap-8 { gap: 8px; }
.flex { display: flex; }
.items-center { align-items: center; }
.section-title { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 12px; }
.section-sub { text-align: center; color: var(--text-dim); margin-bottom: 48px; }
.divider { height: 1px; background: var(--border); margin: 60px 0; }

.spinner {
  display: inline-block; width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.2); border-top-color: var(--primary);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 9999;
  padding: 14px 20px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; max-width: 360px;
  animation: slideIn 0.3s ease; box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
.toast-success { background: rgba(16,185,129,0.9); color: #fff; }
.toast-error { background: rgba(239,68,68,0.9); color: #fff; }
@keyframes slideIn { from { transform: translateX(100px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ── Features Section ─────────────────────────────────────── */
.features-section { padding: 80px 24px; max-width: 1100px; margin: 0 auto; }
.features-hero-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.feature-card {
  background: var(--glass); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 28px; transition: all 0.3s;
}
.feature-card:hover { background: var(--glass-hover); border-color: rgba(99,102,241,0.3); transform: translateY(-3px); }
.feature-icon-big { font-size: 32px; margin-bottom: 16px; }
.feature-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-dim); line-height: 1.7; }

/* ── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border); padding: 40px 24px;
  text-align: center; color: var(--text-dim); font-size: 13px;
}