/* ============================================================
   USDTPay — GSMOne Design System
   Light theme, Barlow font, Teal accent (#0086AA / #006994)
   ============================================================ */

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

/* --- Design Tokens --- */
:root {
  color-scheme: light only;
  --primary: #0086AA;
  --primary-hover: #006994;
  --primary-light: #e0f4f8;
  --success: #16a34a;
  --success-bg: #d1fae5;
  --warning: #ca8a04;
  --warning-bg: #fef3c7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --info: #0086AA;
  --info-bg: #e0f4f8;

  --bg-page: linear-gradient(110deg, #f1e6f4 0%, #e0e5f4 50%, #e4f2f9 100%);
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --bg-sidebar: #ffffff;
  --bg-topbar: #ffffff;

  --text: #131920;
  --text-secondary: #374151;
  --muted: #6c757d;
  --line: #e5e7eb;
  --panel: #ffffff;

  --shadow-card: 0px 8px 24px rgba(27, 46, 94, 0.08);
  --shadow-toast: 0 10px 30px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 50rem;
}

/* --- Reset --- */
* { box-sizing: border-box }
body {
  font-family: 'Barlow', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg-page);
  color: var(--text);
  margin: 0;
  min-height: 100vh;
}
a { color: var(--primary); }

/* --- Container --- */
.container { max-width: 1100px; margin: 0 auto; padding: 16px }

/* --- Topbar (public) --- */
.topbar {
  background: var(--bg-topbar);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.brand a {
  color: var(--primary-hover);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
}
.nav { display: flex; gap: 8px; align-items: center }
.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 500;
  font-size: 14px;
  transition: all .15s;
}
.nav a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

/* Logout form */
.logout-form { display: inline }
.logout-form .linklike {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 8px 14px;
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  transition: all .15s;
}
.logout-form .linklike:hover {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger);
}

/* --- Cards --- */
.card, main .card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
}
.card.narrow { max-width: 480px; margin: 24px auto }
.card-title {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

/* --- Grid --- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

/* Key-value pairs */
.k { font-size: 12px; color: var(--muted) }
.v { font-size: 20px; color: var(--text); margin-top: 6px; font-weight: 600 }
.v.small { font-size: 12px; word-break: break-all; font-weight: 400 }

/* --- Alerts --- */
.alert {
  background: var(--success-bg);
  border: 1px solid var(--success);
  color: #047857;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin: 12px 0;
  font-size: 14px;
}
.alert.error {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: #b91c1c;
}

/* --- Toasts --- */
#toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9999;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 260px;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 16px;
  box-shadow: var(--shadow-toast);
  opacity: 1;
  transform: translateY(0);
  transition: opacity .25s, transform .25s;
}
.toast.removing { opacity: 0; transform: translateY(-8px) }
.toast .toast-icon {
  width: 24px; height: 24px;
  display: grid; place-items: center;
  border-radius: 50%;
  font-weight: 700;
  font-size: 13px;
}
.toast.success { border-left: 4px solid var(--success) }
.toast.success .toast-icon { background: var(--success-bg); color: var(--success) }
.toast.error { border-left: 4px solid var(--danger) }
.toast.error .toast-icon { background: var(--danger-bg); color: var(--danger) }
.toast .toast-message { color: var(--text); font-size: 14px }

/* --- Forms --- */
form label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-top: 10px;
  margin-bottom: 4px;
  font-weight: 500;
}
input, select, textarea {
  background: var(--bg-input);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text);
  outline: none;
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 134, 170, 0.12);
}
input[type="file"] {
  padding: 8px;
  border-style: dashed;
}
input[type="checkbox"] {
  width: auto;
  accent-color: var(--primary);
}

/* --- Buttons --- */
button.primary {
  background: var(--primary);
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  margin-top: 12px;
  font-size: 14px;
  transition: background .15s;
}
button.primary:hover { background: var(--primary-hover) }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: all .15s;
}
.btn:hover {
  background: #f9fafb;
  border-color: #d1d5db;
}

/* --- Sidebar Layout --- */
.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}
.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--line);
  padding: 20px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  box-shadow: 2px 0 12px rgba(0,0,0,0.04);
}
.sidebar .title {
  color: var(--primary-hover);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 14px;
}
.sidebar a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  transition: all .15s;
}
.sidebar a:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.sidebar a.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.content { padding: 28px; min-width: 0 }

/* --- Page Title --- */
.page-title {
  font-size: 22px;
  color: var(--text);
  font-weight: 700;
  margin: 0 0 20px;
}

/* --- Stat Cards --- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  gap: 12px;
  align-items: center;
  box-shadow: var(--shadow-card);
}
.stat-card .ico {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 18px;
}
.stat-card .meta { display: flex; flex-direction: column }
.stat-card .meta .k { font-size: 12px; color: var(--muted) }
.stat-card .meta .v { font-size: 22px; color: var(--text); font-weight: 700 }

/* --- Snippet Card --- */
.snippet {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
}
.snippet .desc { font-size: 13px; color: var(--muted); margin: 6px 0 10px }
.snippet textarea {
  width: 100%;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
}
.snippet .row { display: flex; gap: 8px; align-items: center; margin-top: 12px }
.snippet code { color: var(--text-secondary) }

/* --- Mobile Topbar --- */
.mobile-topbar {
  display: none;
  background: var(--bg-topbar);
  border-bottom: 1px solid var(--line);
  padding: 12px 16px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.mobile-topbar .brand { color: var(--primary-hover); font-weight: 700; font-size: 16px }
.burger {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 500;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr }
  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform .25s ease;
    z-index: 1000;
    box-shadow: 4px 0 20px rgba(0,0,0,0.1);
  }
  .layout.sidebar-open .sidebar { transform: translateX(0) }
  .content { padding: 16px }
  .mobile-topbar { display: flex }
  .stats { grid-template-columns: 1fr 1fr }
  .topbar .container { gap: 12px; flex-wrap: wrap; min-height: 56px }
  .nav { flex-wrap: wrap; gap: 6px }
  .nav a { padding: 6px 10px; font-size: 13px }
}
@media (max-width: 480px) {
  .stats { grid-template-columns: 1fr }
  .grid { grid-template-columns: 1fr }
  .container { padding: 12px }
  .card { padding: 16px }
  .nav { gap: 4px }
  .nav a { padding: 6px 8px; font-size: 12px }
  .topbar .container { padding: 8px 12px }
}

/* --- Tables --- */
table { border-collapse: collapse; width: 100% }
.table-wrap { overflow-x: auto }
thead th {
  font-weight: 600;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 12px;
  text-align: left;
  background: #f8fafc;
  border-bottom: 2px solid var(--line);
}
tbody td {
  font-size: 14px;
  color: var(--text);
  padding: 12px;
}
tbody tr { border-bottom: 1px solid #f3f4f6 }
tbody tr:hover { background: #f0f9fb }

/* --- Badges --- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 500;
  background: #f3f4f6;
  color: #6b7280;
  border: none;
}
.badge.confirmed, .badge.success, .badge.active {
  background: var(--success-bg);
  color: #047857;
}
.badge.pending, .badge.info, .badge.trial {
  background: var(--info-bg);
  color: var(--primary);
}
.badge.expired, .badge.failed, .badge.danger {
  background: var(--danger-bg);
  color: #b91c1c;
}
.badge.warning, .badge.grace {
  background: var(--warning-bg);
  color: #b45309;
}
.badge.purple {
  background: #ede9fe;
  color: #7c3aed;
}
.badge.gray {
  background: #f3f4f6;
  color: #6b7280;
}

/* --- Utility --- */
h1, h2, h3, h4, h5, h6 { color: var(--text) }
code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--primary-hover);
}
hr { border: none; border-top: 1px solid var(--line); margin: 16px 0 }
details summary { cursor: pointer; color: var(--primary); font-weight: 500 }
small { color: var(--muted) }