/* FLUX OTP Enterprise Design System - Pixel-perfect Inspired by api.pmodhub.com */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, Monaco, monospace;

  /* pmodhub Light theme vars */
  --bg: #ffffff;
  --bg2: #f8f9fa;
  --bg3: #f1f3f5;
  --card: #ffffff;
  --card-elevated: #ffffff;
  --border: #e5e7eb;
  --border-focus: #00bcd4;
  --text: #09090b;
  --text2: #52525b;
  --text3: #a1a1aa;

  /* Cyan Accent */
  --cyan: #00bcd4;
  --cyan-dk: #0097a7;
  --cyan-bg: #e0f7fa;
  --cyan-border: rgba(0, 188, 212, 0.4);

  --primary: #00bcd4;
  --primary-hover: #0097a7;
  --primary-glow: rgba(0, 188, 212, 0.25);
  --primary-light: rgba(0, 188, 212, 0.1);

  --green: #10b981;
  --green-bg: #e8f5e9;
  --green-border: rgba(16, 185, 129, 0.35);

  --red: #ef4444;
  --red-bg: #ffebee;
  --red-border: rgba(239, 68, 68, 0.35);

  --amber: #f59e0b;
  --amber-bg: #fff8e1;
  --amber-border: rgba(245, 158, 11, 0.35);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  --nav-h: 60px;
}

[data-theme="dark"] {
  /* pmodhub Dark theme vars */
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #21262d;
  --card: #161b22;
  --card-elevated: #1c2128;
  --border: #30363d;
  --border-focus: #22d3ee;
  --text: #f0f6fc;
  --text2: #8b949e;
  --text3: #484f58;

  --cyan: #22d3ee;
  --cyan-dk: #00bcd4;
  --cyan-bg: rgba(34, 211, 238, 0.12);
  --cyan-border: rgba(34, 211, 238, 0.45);

  --primary: #22d3ee;
  --primary-hover: #06b6d4;
  --primary-glow: rgba(34, 211, 238, 0.3);
  --primary-light: rgba(34, 211, 238, 0.12);

  --green: #22c55e;
  --green-bg: rgba(34, 197, 94, 0.15);
  --green-border: rgba(34, 197, 94, 0.35);

  --red: #f87171;
  --red-bg: rgba(248, 113, 113, 0.15);
  --red-border: rgba(248, 113, 113, 0.35);

  --amber: #fbbf24;
  --amber-bg: rgba(251, 191, 36, 0.15);
  --amber-border: rgba(251, 191, 36, 0.35);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
}

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

html {
  font-size: 14.5px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
  width: 100%;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  text-decoration: none;
  opacity: 0.9;
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg2);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1rem;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.02em;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--cyan) 0%, var(--cyan-dk) 100%);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px var(--primary-glow);
  flex-shrink: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: nowrap;
}

.theme-toggle-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}
.theme-toggle-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* App Container */
.app-container {
  flex: 1;
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 0.55rem 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.16s ease;
  white-space: nowrap;
  user-select: none;
  text-decoration: none !important;
}

.btn-primary {
  background: var(--cyan);
  color: #000000;
  font-weight: 700;
  box-shadow: 0 2px 8px var(--primary-glow);
}
.btn-primary:hover {
  background: var(--primary-hover);
  color: #000000;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--border);
  color: var(--text);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text2);
}
.btn-outline:hover {
  background: var(--bg3);
  color: var(--text);
  border-color: var(--cyan);
}

.btn-danger {
  background: var(--red);
  color: #ffffff;
}
.btn-danger:hover {
  opacity: 0.9;
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.8rem 1.6rem;
  font-size: 0.98rem;
  border-radius: var(--radius-md);
}

.btn-block {
  width: 100%;
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1.25rem;
  transition: border-color 0.2s ease;
}
.card:hover {
  border-color: var(--border-focus);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* Stat Cards */
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.15rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.stat-card:hover {
  border-color: var(--cyan-border);
  transform: translateY(-2px);
}

.stat-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text2);
  margin-bottom: 0.35rem;
}

.stat-value {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text);
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.stat-desc {
  font-size: 0.78rem;
  color: var(--text3);
  margin-top: 0.4rem;
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 1.15rem;
}

.form-label {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.form-input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.95rem; /* 16px giu nguyen tren iOS chong zoom */
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--primary-light);
  background: var(--bg);
}

.form-hint {
  font-size: 0.76rem;
  color: var(--text2);
  margin-top: 0.35rem;
  line-height: 1.4;
}

/* Grids */
.grid {
  display: grid;
  gap: 1rem;
}
.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.74rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  line-height: 1;
  white-space: nowrap;
}

.badge-primary {
  background: var(--cyan-bg);
  color: var(--cyan);
  border: 1px solid var(--cyan-border);
}

.badge-success {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}

.badge-danger {
  background: var(--red-bg);
  color: var(--red);
  border: 1px solid var(--red-border);
}

.badge-warning {
  background: var(--amber-bg);
  color: var(--amber);
  border: 1px solid var(--amber-border);
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
}

.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.85rem;
}

.data-table th {
  background: var(--bg3);
  color: var(--text2);
  text-align: left;
  font-weight: 700;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.data-table td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

.data-table tr:hover td {
  background: var(--bg2);
}

/* Key box */
.key-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.65rem 0.9rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.code-block {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Alerts */
.alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.alert-success {
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  color: var(--green);
}
.alert-danger {
  background: var(--red-bg);
  border: 1px solid var(--red-border);
  color: var(--red);
}
.alert-info {
  background: var(--cyan-bg);
  border: 1px solid var(--cyan-border);
  color: var(--cyan);
}

/* Footer */
.app-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: var(--bg2);
  padding: 1.5rem 1rem;
  font-size: 0.82rem;
  color: var(--text2);
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 260px;
  max-width: 380px;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.84rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  animation: toastIn 0.22s ease-out;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
}
.toast.toast-success {
  border-color: var(--green-border);
  background: var(--card);
  color: var(--green);
}
.toast.toast-error {
  border-color: var(--red-border);
  background: var(--card);
  color: var(--red);
}
@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ========================================================
   RESPONSIVE DESIGN CHO THIẾT BỊ DI ĐỘNG & TABLET
   ======================================================== */

@media (max-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  :root {
    --nav-h: auto;
  }

  .nav-container {
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
    gap: 0.65rem;
  }

  .brand-link {
    font-size: 1.05rem;
  }
  .brand-icon {
    width: 28px;
    height: 28px;
  }

  .nav-actions {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
    gap: 0.4rem;
    justify-content: flex-start;
  }

  .nav-actions::-webkit-scrollbar {
    display: none;
  }

  .app-container {
    padding: 1rem 0.75rem;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .stat-card {
    padding: 0.95rem;
  }
  .stat-value {
    font-size: 1.6rem;
  }

  .card {
    padding: 1rem 0.85rem;
    border-radius: var(--radius-md);
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
  }

  .btn {
    padding: 0.55rem 0.85rem;
    font-size: 0.82rem;
  }

  .table-responsive {
    border: 1px solid var(--border);
  }

  .data-table th,
  .data-table td {
    padding: 0.65rem 0.7rem;
    font-size: 0.78rem;
  }

  .toast-container {
    left: 12px;
    right: 12px;
    bottom: 12px;
  }
  .toast {
    min-width: unset;
    width: 100%;
  }

  .app-footer {
    padding: 1.25rem 0.75rem;
  }
}

@media (max-width: 480px) {
  .stat-card .stat-value {
    font-size: 1.45rem;
  }

  .hero-title {
    font-size: 1.75rem !important;
  }
  .hero-desc {
    font-size: 0.95rem !important;
  }
}


/* Auth pages styling (Login / Register) */
.auth-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 160px);
  padding: 1.5rem 0.75rem;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.auth-header h1 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.auth-header p {
  font-size: 0.86rem;
  color: var(--text2);
}

@media (max-width: 480px) {
  .auth-card {
    padding: 1.5rem 1.15rem;
    box-shadow: none;
    border-radius: var(--radius-md);
  }
  .auth-header h1 {
    font-size: 1.3rem;
  }
}