/* ============================================================
   Tube Radar — Shared theme for account/auth/pricing pages
   Đồng bộ với landing_page.html + preview_payment_ui.html
   ============================================================ */

:root {
  --bg: #060a14;
  --bg-deep: #050510;
  --card: #0f1424;
  --card-hover: #161c30;
  --card-elev: #16162a;
  --border: #1f2540;
  --border-strong: #2a2a3e;

  --primary: #ff2d3a;
  --primary-soft: rgba(255,45,58,0.12);
  --accent: #00d9ff;
  --accent-soft: rgba(0,217,255,0.10);

  --text: #f0f0f5;
  --text-strong: #ffffff;
  --muted: #8a8a9e;
  --muted-dim: #5a6072;

  --success: #34d399;
  --success-bg: rgba(52,211,153,0.10);
  --warn: #fbbf24;
  --warn-bg: rgba(251,191,36,0.10);
  --fail: #f87171;
  --fail-bg: rgba(248,113,113,0.10);

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 24px rgba(0,217,255,0.15);
}

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

html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Be Vietnam Pro','Inter','Segoe UI',sans-serif;
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Animated background grid */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(0,217,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,217,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  animation: gridMove 28s linear infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes gridMove {
  0%   { transform: translate(0,0); }
  100% { transform: translate(56px,56px); }
}

/* Radial glow */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 30% 0%, rgba(0,217,255,0.08), transparent 60%),
    radial-gradient(ellipse 70% 50% at 70% 100%, rgba(255,45,58,0.06), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

main, .page-wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Top nav bar ===== */
.topbar {
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(6,10,20,0.85);
  backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 50;
}
.topbar .brand {
  display: flex; align-items: center; gap: 12px;
  font-family: 'Orbitron',sans-serif;
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 2px;
  text-decoration: none;
}
.topbar .brand img { height: 36px; width: 36px; }
.topbar .brand .tube  { color: var(--primary); }
.topbar .brand .radar { color: var(--accent); }
.topbar nav {
  margin-left: auto;
  display: flex; align-items: center; gap: 8px;
}
.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  transition: all .15s;
}
.topbar nav a:hover { color: var(--text); background: var(--card); }
.topbar nav a.active { color: var(--accent); }
.topbar nav .btn-cta {
  background: linear-gradient(90deg, var(--primary) 0%, #ff5161 100%);
  color: #fff;
  padding: 9px 18px;
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(255,45,58,0.35);
}
.topbar nav .btn-cta:hover { transform: translateY(-1px); background: linear-gradient(90deg, #ff5161 0%, #ff2d3a 100%); }

/* ===== Centered single-card layout (login/register/etc) ===== */
.center-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
}
.auth-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 36px 32px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow);
  position: relative;
}
.auth-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(0,217,255,0.4), rgba(255,45,58,0.2) 50%, transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 6px;
}
.auth-logo img { height: 40px; width: 40px; }
.auth-logo .title {
  font-family: 'Orbitron',sans-serif;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 2px;
}
.auth-logo .title .tube  { color: var(--primary); }
.auth-logo .title .radar { color: var(--accent); }
.auth-tag {
  text-align: center;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--muted);
  margin-bottom: 22px;
}

h1, h2, h3 { color: var(--text-strong); font-weight: 800; }
h1 { font-size: 28px; line-height: 1.25; }
h2 { font-size: 22px; }
h3 { font-size: 17px; }

.page-title {
  font-size: 24px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 6px;
  background: linear-gradient(90deg, #ffffff 0%, #b9d8e6 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-sub {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 22px;
}

/* ===== Form fields ===== */
.field {
  margin-bottom: 14px;
}
.field-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.input,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
textarea {
  width: 100%;
  height: 48px;
  background: var(--bg-deep);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 0 14px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  transition: border-color .15s, box-shadow .15s;
}
textarea {
  height: auto;
  padding: 12px 14px;
  resize: vertical;
}
.input:focus,
input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
input::placeholder, textarea::placeholder { color: var(--muted-dim); }

.input-wrap {
  position: relative;
}
.input-wrap .toggle-pw {
  position: absolute;
  right: 12px; top: 50%;
  transform: translateY(-50%);
  background: transparent; border: 0;
  cursor: pointer;
  color: var(--muted);
  padding: 4px 6px;
  font-size: 16px;
}
.input-wrap .toggle-pw:hover { color: var(--accent); }

/* OTP code input style */
.otp-input {
  letter-spacing: 16px;
  text-align: center;
  font-family: 'Orbitron',monospace;
  font-size: 24px !important;
  font-weight: 800 !important;
  padding-left: 18px !important;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 22px;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.4px;
  cursor: pointer;
  transition: all .15s ease;
  text-decoration: none;
  user-select: none;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-block { width: 100%; }
.btn-lg { height: 52px; font-size: 16px; }
.btn-sm { height: 36px; font-size: 13px; padding: 0 14px; }

.btn-primary {
  background: linear-gradient(90deg, var(--primary) 0%, #ff5161 100%);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255,45,58,0.35);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(255,45,58,0.45);
}

.btn-accent {
  background: linear-gradient(90deg, var(--accent) 0%, #5af2ff 100%);
  color: #061018;
  box-shadow: 0 6px 20px rgba(0,217,255,0.30);
}
.btn-accent:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(0,217,255,0.45);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-outline:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
}
.btn-ghost:hover:not(:disabled) { color: var(--text); background: var(--card); }

.btn-warn {
  background: linear-gradient(90deg, #ff9a3d 0%, #ffb74d 100%);
  color: #1a0f00;
  box-shadow: 0 6px 20px rgba(255,154,61,0.35);
}

/* ===== Auxiliary text helpers ===== */
.text-muted { color: var(--muted); }
.text-accent { color: var(--accent); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-warn { color: var(--warn); }
.text-fail { color: var(--fail); }
.text-center { text-align: center; }
.text-small { font-size: 13px; }
.text-tiny { font-size: 12px; }
.mt-4 { margin-top: 4px; } .mt-8 { margin-top: 8px; } .mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }

.divider {
  margin: 20px 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

.link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: color .15s;
}
.link:hover { color: #5af2ff; text-decoration: underline; }

/* ===== Alerts / Banners ===== */
.alert {
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 14px;
  margin-bottom: 14px;
  display: flex; align-items: flex-start; gap: 10px;
  line-height: 1.5;
  border: 1px solid transparent;
}
.alert .icon { flex-shrink: 0; font-size: 18px; line-height: 1; margin-top: 1px; }
.alert-info    { background: var(--accent-soft);  border-color: rgba(0,217,255,0.25);  color: #b9eaf5; }
.alert-success { background: var(--success-bg);   border-color: rgba(52,211,153,0.25); color: #aef1d4; }
.alert-warn    { background: var(--warn-bg);      border-color: rgba(251,191,36,0.25); color: #ffe2a8; }
.alert-error   { background: var(--fail-bg);      border-color: rgba(248,113,113,0.25); color: #ffc7c7; }

/* Affiliate referral banner */
.ref-banner {
  background: linear-gradient(90deg, rgba(0,217,255,0.10), rgba(255,45,58,0.10));
  border: 1px solid rgba(0,217,255,0.25);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 18px;
  display: flex; align-items: center; gap: 10px;
  font-size: 13.5px;
  color: #d9eef7;
}
.ref-banner .gift { font-size: 18px; }
.ref-banner strong { color: var(--accent); font-weight: 700; }

/* Toast */
.toast-stack {
  position: fixed;
  bottom: 24px; right: 24px;
  display: flex; flex-direction: column; gap: 10px;
  z-index: 9999;
}
.toast {
  background: var(--card-elev);
  color: var(--text);
  padding: 12px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  font-size: 14px;
  min-width: 240px; max-width: 360px;
  display: flex; align-items: center; gap: 10px;
  animation: toastIn .25s ease;
}
.toast.success { border-left: 4px solid var(--success); }
.toast.error   { border-left: 4px solid var(--fail); }
.toast.info    { border-left: 4px solid var(--accent); }
@keyframes toastIn {
  from { transform: translateX(20px); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

/* ===== Generic content card ===== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
}
.card + .card { margin-top: 18px; }

/* ===== Plan-pricing grid ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 18px;
}
.plan-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  position: relative;
  transition: all .2s;
  display: flex; flex-direction: column;
}
.plan-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.plan-card.vip   { border-color: rgba(255,154,61,0.45); }
.plan-card.vip:hover { border-color: #ffb74d; }
.plan-card.recommended {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 12px 40px rgba(0,217,255,0.18);
}
.plan-badge {
  position: absolute; top: -10px; right: 18px;
  background: var(--accent); color: #061018;
  font-size: 11px; font-weight: 800; letter-spacing: 1px;
  padding: 4px 10px; border-radius: 999px;
  text-transform: uppercase;
}
.plan-card.vip .plan-badge { background: #ffb74d; }
.plan-name {
  font-size: 16px; font-weight: 700;
  color: var(--text); margin-bottom: 4px;
}
.plan-tier {
  display: inline-block;
  font-size: 11px; font-weight: 800;
  letter-spacing: 1px;
  padding: 3px 9px; border-radius: 999px;
  margin-bottom: 14px;
}
.plan-tier.basic { background: var(--accent-soft); color: var(--accent); }
.plan-tier.vip { background: rgba(255,154,61,0.15); color: #ffb74d; }
.plan-price {
  font-family: 'Orbitron',monospace;
  font-size: 32px; font-weight: 900;
  color: var(--text-strong); margin-bottom: 2px;
}
.plan-period { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.plan-old-price { color: var(--muted-dim); text-decoration: line-through; font-size: 13px; }
.plan-savings { font-size: 12px; color: var(--success); font-weight: 700; }
.plan-features {
  list-style: none;
  margin: 18px 0;
  display: flex; flex-direction: column; gap: 8px;
  flex: 1;
}
.plan-features li {
  font-size: 13.5px; color: var(--text);
  display: flex; align-items: flex-start; gap: 8px;
}
.plan-features li::before {
  content: '✓';
  color: var(--success);
  font-weight: 800;
  flex-shrink: 0;
}
.plan-action { margin-top: auto; }

/* ===== Stat KPI ===== */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px,1fr));
  gap: 14px;
  margin-bottom: 18px;
}
.kpi {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.kpi .label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; }
.kpi .value { font-size: 24px; font-weight: 800; font-family: 'Orbitron',monospace; }
.kpi .value.accent  { color: var(--accent); }
.kpi .value.primary { color: var(--primary); }
.kpi .value.success { color: var(--success); }
.kpi .value.warn    { color: var(--warn); }

/* Trial countdown badge */
.trial-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--warn-bg);
  border: 1px solid rgba(251,191,36,0.35);
  color: var(--warn);
  font-size: 13px; font-weight: 700;
  padding: 6px 12px; border-radius: 999px;
}
.trial-badge.expired { background: var(--fail-bg); border-color: rgba(248,113,113,0.35); color: var(--fail); }
.trial-badge.active-paid { background: var(--success-bg); border-color: rgba(52,211,153,0.35); color: var(--success); }

/* ===== Footer ===== */
.site-footer {
  margin-top: auto;
  padding: 24px 28px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.site-footer .links { margin-top: 6px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Loading spinner ===== */
.spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .8s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .topbar { padding: 0 16px; height: 56px; }
  .topbar .brand { font-size: 18px; }
  .auth-card { padding: 28px 22px 24px; }
  h1 { font-size: 24px; }
  .page-title { font-size: 20px; }
}