/* ============================================
   Cloudflare Email Inbox — Style System
   Premium dark/light theme with glassmorphism
   ============================================ */

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

/* --- Design Tokens --- */
:root {
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.18);
  --transition: .25s cubic-bezier(.4,0,.2,1);
  --transition-slow: .4s cubic-bezier(.4,0,.2,1);
}

/* --- Dark Theme (default) --- */
[data-theme="dark"] {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17,24,39,.7);
  --bg-glass: rgba(255,255,255,.04);
  --bg-glass-hover: rgba(255,255,255,.08);
  --bg-input: rgba(255,255,255,.06);
  --border-color: rgba(255,255,255,.08);
  --border-active: rgba(99,102,241,.5);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-bg: rgba(99,102,241,.12);
  --danger: #f87171;
  --danger-bg: rgba(248,113,113,.12);
  --success: #34d399;
  --success-bg: rgba(52,211,153,.12);
  --warning: #fbbf24;
  --scrollbar-thumb: rgba(255,255,255,.12);
  --glass-border: rgba(255,255,255,.06);
  --overlay: rgba(0,0,0,.6);
}

/* --- Light Theme --- */
[data-theme="light"] {
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255,255,255,.85);
  --bg-glass: rgba(255,255,255,.6);
  --bg-glass-hover: rgba(255,255,255,.8);
  --bg-input: rgba(0,0,0,.04);
  --border-color: rgba(0,0,0,.08);
  --border-active: rgba(99,102,241,.4);
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-bg: rgba(99,102,241,.08);
  --danger: #ef4444;
  --danger-bg: rgba(239,68,68,.08);
  --success: #10b981;
  --success-bg: rgba(16,185,129,.08);
  --warning: #f59e0b;
  --scrollbar-thumb: rgba(0,0,0,.12);
  --glass-border: rgba(0,0,0,.06);
  --overlay: rgba(0,0,0,.4);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

/* --- Animated Background --- */
.bg-pattern {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
}
.bg-pattern::before, .bg-pattern::after {
  content: ''; position: absolute; border-radius: 50%; filter: blur(120px); opacity: .15;
  animation: floatBlob 20s ease-in-out infinite;
}
.bg-pattern::before {
  width: 600px; height: 600px; top: -200px; right: -100px;
  background: radial-gradient(circle, #818cf8, #6366f1, transparent);
}
.bg-pattern::after {
  width: 500px; height: 500px; bottom: -150px; left: -100px;
  background: radial-gradient(circle, #34d399, #06b6d4, transparent);
  animation-delay: -10s;
}
@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(.95); }
}

/* --- Layout --- */
.app-wrapper {
  position: relative; z-index: 1; min-height: 100vh;
  display: flex; flex-direction: column;
}

/* --- Header --- */
.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky; top: 0; z-index: 100;
}
.app-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.15rem; color: var(--text-primary);
}
.app-logo svg { color: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 8px; }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border: none; border-radius: var(--radius-sm);
  font-family: var(--font-main); font-size: .85rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition); outline: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(99,102,241,.3); }
.btn-ghost {
  background: var(--bg-glass); color: var(--text-secondary);
  border: 1px solid var(--border-color);
}
.btn-ghost:hover { background: var(--bg-glass-hover); color: var(--text-primary); }
.btn-danger {
  background: var(--danger-bg); color: var(--danger);
  border: 1px solid transparent;
}
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-icon {
  padding: 8px; border-radius: var(--radius-sm);
  background: var(--bg-glass); border: 1px solid var(--border-color);
  color: var(--text-secondary); cursor: pointer; transition: all var(--transition);
  display: inline-flex; align-items: center; justify-content: center;
}
.btn-icon:hover { background: var(--bg-glass-hover); color: var(--text-primary); }

/* --- Login Page --- */
.login-container {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 24px;
}
.login-card {
  width: 100%; max-width: 400px;
  background: var(--bg-card);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl); padding: 40px;
  box-shadow: var(--shadow-lg);
  animation: fadeUp .5s ease-out;
}
.login-card h1 {
  font-size: 1.5rem; font-weight: 700; margin-bottom: 4px;
  display: flex; align-items: center; gap: 10px;
}
.login-card h1 svg { color: var(--accent); }
.login-subtitle { color: var(--text-secondary); font-size: .9rem; margin-bottom: 28px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: .8rem; font-weight: 500;
  color: var(--text-secondary); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .5px;
}
.form-input {
  width: 100%; padding: 12px 14px;
  background: var(--bg-input); border: 1px solid var(--border-color);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-family: var(--font-main); font-size: .95rem;
  transition: all var(--transition); outline: none;
}
.form-input:focus { border-color: var(--border-active); box-shadow: 0 0 0 3px var(--accent-bg); }
.form-input::placeholder { color: var(--text-muted); }
.login-btn { width: 100%; justify-content: center; padding: 12px; font-size: .95rem; }
.login-error {
  margin-top: 16px; padding: 10px 14px; border-radius: var(--radius-sm);
  background: var(--danger-bg); color: var(--danger); font-size: .85rem;
  display: none; align-items: center; gap: 8px;
  animation: shake .4s ease-out;
}
.login-error.show { display: flex; }

/* --- Main Content --- */
.main-content { flex: 1; padding: 24px; max-width: 960px; margin: 0 auto; width: 100%; }

/* --- Inbox --- */
.inbox-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.inbox-title { font-size: 1.3rem; font-weight: 700; }
.inbox-count {
  background: var(--accent-bg); color: var(--accent);
  padding: 2px 10px; border-radius: 99px; font-size: .8rem; font-weight: 600;
  margin-left: 8px;
}
.email-list { display: flex; flex-direction: column; gap: 4px; }

.email-item {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 18px; border-radius: var(--radius-md);
  background: var(--bg-glass); border: 1px solid transparent;
  cursor: pointer; transition: all var(--transition);
  animation: fadeUp .35s ease-out both;
}
.email-item:hover {
  background: var(--bg-glass-hover); border-color: var(--border-color);
  transform: translateX(4px);
}
.email-item:nth-child(n) { animation-delay: calc(var(--i, 0) * 40ms); }

.email-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: .9rem; color: #fff; flex-shrink: 0;
}
.email-body { flex: 1; min-width: 0; }
.email-from {
  font-weight: 600; font-size: .9rem; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.email-subject {
  font-size: .85rem; color: var(--text-secondary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  margin-top: 1px;
}
.email-preview {
  font-size: .8rem; color: var(--text-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  margin-top: 2px;
}
.email-meta {
  display: flex; flex-direction: column; align-items: flex-end; gap: 4px;
  flex-shrink: 0;
}
.email-date { font-size: .75rem; color: var(--text-muted); white-space: nowrap; }
.email-delete-btn {
  opacity: 0; transition: opacity var(--transition);
  background: none; border: none; color: var(--danger);
  cursor: pointer; padding: 4px; border-radius: 4px;
}
.email-item:hover .email-delete-btn { opacity: 1; }
.email-delete-btn:hover { background: var(--danger-bg); }

/* --- Email Detail --- */
.email-detail-card {
  background: var(--bg-card);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); overflow: hidden;
  animation: fadeUp .4s ease-out;
}
.email-detail-header {
  padding: 24px; border-bottom: 1px solid var(--border-color);
}
.email-detail-subject {
  font-size: 1.25rem; font-weight: 700; margin-bottom: 16px;
  line-height: 1.4;
}
.email-detail-meta {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  font-size: .85rem; color: var(--text-secondary);
}
.email-detail-meta .tag {
  background: var(--accent-bg); color: var(--accent);
  padding: 3px 10px; border-radius: 99px; font-size: .78rem; font-weight: 500;
}
.email-detail-actions {
  display: flex; gap: 8px; padding: 14px 24px;
  border-bottom: 1px solid var(--border-color);
}
.email-detail-body {
  padding: 24px; font-size: .93rem; line-height: 1.7;
  color: var(--text-primary);
}
.email-detail-body iframe {
  width: 100%; min-height: 300px; border: none; border-radius: var(--radius-sm);
  background: #fff;
}

/* --- Pagination --- */
.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; margin-top: 24px; padding: 16px 0;
}
.pagination .btn { min-width: 36px; justify-content: center; }
.pagination .page-info { font-size: .85rem; color: var(--text-secondary); padding: 0 8px; }

/* --- Loading & States --- */
.loading-container {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; padding: 80px 20px; gap: 16px;
}
.spinner {
  width: 36px; height: 36px; border: 3px solid var(--border-color);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state {
  text-align: center; padding: 80px 20px; color: var(--text-muted);
}
.empty-state svg { margin-bottom: 16px; opacity: .4; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 6px; }
.empty-state p { font-size: .88rem; }

.error-banner {
  padding: 12px 16px; border-radius: var(--radius-sm);
  background: var(--danger-bg); color: var(--danger);
  font-size: .85rem; display: flex; align-items: center; gap: 8px;
  margin-bottom: 16px; animation: fadeUp .3s ease-out;
}

.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 9999;
  padding: 12px 20px; border-radius: var(--radius-sm);
  font-size: .85rem; font-weight: 500; color: #fff;
  box-shadow: var(--shadow-lg); transform: translateY(100px);
  opacity: 0; transition: all .35s cubic-bezier(.4,0,.2,1);
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { background: #059669; }
.toast.error { background: #dc2626; }

/* --- Skeleton Loading --- */
.skeleton {
  background: linear-gradient(90deg, var(--bg-glass) 25%, var(--bg-glass-hover) 50%, var(--bg-glass) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
.skeleton-item { display: flex; align-items: center; gap: 14px; padding: 14px 18px; }
.skeleton-avatar { width: 40px; height: 40px; border-radius: 50%; }
.skeleton-lines { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.skeleton-line { height: 12px; border-radius: 6px; }
.skeleton-line.w60 { width: 60%; }
.skeleton-line.w80 { width: 80%; }
.skeleton-line.w40 { width: 40%; }

/* --- Animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* --- Modal / Confirm Dialog --- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: var(--overlay); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity var(--transition);
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-box {
  background: var(--bg-secondary); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 28px;
  max-width: 380px; width: 90%;
  box-shadow: var(--shadow-lg); transform: scale(.9);
  transition: transform var(--transition);
}
.modal-overlay.active .modal-box { transform: scale(1); }
.modal-box h3 { font-size: 1.05rem; margin-bottom: 8px; }
.modal-box p { font-size: .88rem; color: var(--text-secondary); margin-bottom: 20px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* --- Responsive --- */
@media (max-width: 640px) {
  .app-header { padding: 12px 16px; }
  .main-content { padding: 16px; }
  .login-card { padding: 28px 22px; }
  .email-item { padding: 12px 14px; gap: 10px; }
  .email-avatar { width: 34px; height: 34px; font-size: .8rem; }
  .email-detail-header { padding: 18px 16px; }
  .email-detail-body { padding: 18px 16px; }
  .email-detail-actions { padding: 10px 16px; flex-wrap: wrap; }
  .inbox-header { flex-direction: column; align-items: flex-start; gap: 10px; }
  .email-preview { display: none; }
}