/* ============================================================
   M3U-EDIT.COM v2 — Main Stylesheet
   Location: assets/css/main.css
   ============================================================ */

/* ---------- CSS RESET & BASE ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}
img { max-width: 100%; height: auto; display: block; }
svg { display: block; flex-shrink: 0; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ---------- DESIGN TOKENS - LIGHT MODE ---------- */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #a5b4fc;
  --primary-rgb: 99, 102, 241;
  --accent: #8b5cf6;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;

  --bg: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --bg-card: #ffffff;
  --border: #e5e7eb;
  --border-strong: #d1d5db;

  --text: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --text-inverse: #ffffff;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --header-height: 70px;
}

/* ---------- DARK MODE ---------- */
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --border: #334155;
  --border-strong: #475569;

  --text: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -1px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5);
}

/* ---------- LAYOUT CONTAINERS ---------- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 800px; margin: 0 auto; padding: 0 20px; }

/* ---------- HEADER ---------- */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.85);
}
[data-theme="dark"] .site-header { background: rgba(15,23,42,0.85); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
}
.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 800;
}
.logo:hover { color: var(--primary); }

.nav-main { display: flex; align-items: center; gap: 8px; }
.nav-main a {
  padding: 8px 14px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s;
}
.nav-main a:hover { background: var(--bg-tertiary); color: var(--primary); }

.header-actions { display: flex; align-items: center; gap: 10px; }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); color: #fff; }
.btn-secondary { background: var(--bg-tertiary); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-block { width: 100%; }
/* .btn-lg / .btn-sm sizing is defined once below — see "BUTTON SIZES (extras)".
   (The earlier duplicate definitions were removed; the later block always won.) */

/* ---------- THEME TOGGLE ---------- */
.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.theme-toggle:hover { background: var(--border); color: var(--primary); }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ---------- MOBILE MENU ---------- */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--bg-tertiary);
  align-items: center;
  justify-content: center;
  color: var(--text);
}

@media (max-width: 768px) {
  /* Legacy in-flow nav dropdown removed — the mobile drawer (#mobileMenu,
     styled in header.css) is the single source of truth on mobile. The
     desktop nav stays hidden; never re-show it as a dropdown. */
  .nav-main,
  .nav-main.open { display: none; }
  .mobile-menu-toggle { display: flex; }
  .header-actions .btn { display: none; }
  .header-actions .btn.btn-primary { display: inline-flex; }
}

/* ---------- FOOTER ---------- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-col h4 {
  color: var(--text);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--text-secondary); font-size: 14px; }
.footer-col a:hover { color: var(--primary); }
.footer-brand p { color: var(--text-secondary); font-size: 14px; margin: 12px 0; max-width: 320px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ---------- FLASH MESSAGES ---------- */
.flash-messages { position: fixed; top: 80px; right: 20px; z-index: 1000; max-width: 360px; }
.flash-message {
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 12px;
  color: #fff;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
}
.flash-success { background: var(--success); }
.flash-error { background: var(--danger); }
.flash-warning { background: var(--warning); }
.flash-info { background: var(--info); }
@keyframes slideIn { from { transform: translateX(120%); } to { transform: translateX(0); } }

/* ---------- CARDS ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.card-header { padding-bottom: 16px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.card-title { font-size: 18px; font-weight: 700; color: var(--text); }

/* ---------- UTILITIES ---------- */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; } .mb-4 { margin-bottom: 32px; }

/* ---------- BADGES ---------- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-primary { background: rgba(var(--primary-rgb), 0.1); color: var(--primary); }
.badge-success { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.badge-danger { background: rgba(239, 68, 68, 0.1); color: var(--danger); }

/* ---------- SCROLLBAR ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---------- USER MENU DROPDOWN ---------- */
.user-menu { position: relative; }
.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 6px;
  border-radius: 999px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
}
.user-menu-trigger:hover { background: var(--border); }
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}
.user-menu-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 240px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  display: none;
}
.user-menu-dropdown.open { display: block; }
.user-menu-dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  border-radius: var(--radius);
}
.user-menu-dropdown a:hover { background: var(--bg-tertiary); }
.user-menu-dropdown .divider { height: 1px; background: var(--border); margin: 8px 0; }
.credits-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(var(--primary-rgb),0.1), rgba(139,92,246,0.1));
  color: var(--primary);
  font-weight: 700;
  font-size: 13px;
}

/* ============================================================
   FORM ELEMENTS (added v2 — premium styling)
   ============================================================ */

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: 0.01em;
}

.form-input,
.form-select,
input.form-input,
textarea.form-input,
select.form-select {
  display: block;
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  outline: none;
  box-sizing: border-box;
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
textarea.form-input::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

.form-input:hover,
.form-select:hover {
  border-color: rgba(99, 102, 241, 0.4);
}

.form-input:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
}

textarea.form-input {
  min-height: 90px;
  resize: vertical;
  font-family: inherit;
}

/* Custom select chevron */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
  padding-right: 36px;
  cursor: pointer;
}

.form-help {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Disabled state */
.form-input:disabled,
.form-select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--bg-secondary);
}

/* Checkbox & Radio - basic accessibility */
input[type="checkbox"],
input[type="radio"] {
  accent-color: var(--primary);
  cursor: pointer;
}

/* Number inputs - hide spinners on Webkit */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Focus visible (keyboard only) */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ============================================================
   ALERTS / FLASH
   ============================================================ */
.alert {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 14px;
  border: 1px solid transparent;
}
.alert-info {
  background: rgba(99, 102, 241, 0.08);
  border-color: rgba(99, 102, 241, 0.25);
  color: var(--primary);
}
.alert-success {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.25);
  color: var(--success);
}
.alert-warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.25);
  color: #d97706;
}
.alert-error,
.alert-danger {
  background: rgba(239, 68, 68, 0.08);
  border-color: rgba(239, 68, 68, 0.25);
  color: var(--danger);
}

/* ============================================================
   BUTTON SIZES (extras)
   ============================================================ */
.btn-lg {
  padding: 13px 24px;
  font-size: 15px;
  border-radius: 12px;
  font-weight: 700;
}
.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 8px;
}