/* ============================================
   کافی‌نت آرسام - استایل یکپارچه حرفه‌ای
   تم شب / روز در همه صفحات
   ============================================ */

:root {
  --bg: #070b14;
  --bg2: #0d1424;
  --bg3: #151e30;
  --bg4: #1c273c;
  --border: #243047;
  --border2: #2f3f5a;
  --text: #f1f5f9;
  --text2: #94a3b8;
  --muted: #64748b;
  --accent: #38bdf8;
  --accent2: #818cf8;
  --accent3: #a78bfa;
  --success: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --shadow: 0 20px 50px rgba(0,0,0,.45);
  --radius: 16px;
  --radius-sm: 12px;
  --font: Vazirmatn, system-ui, -apple-system, sans-serif;
  --font-size: 15px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --bubble-user: linear-gradient(135deg, rgba(56,189,248,.18), rgba(14,165,233,.12));
  --bubble-user-border: rgba(56,189,248,.25);
  --bubble-bot: var(--bg3);
  --input-height: 56px;
  --transition: .2s ease;
}

[data-theme="light"] {
  --bg: #f1f5f9;
  --bg2: #ffffff;
  --bg3: #e2e8f0;
  --bg4: #cbd5e1;
  --border: #cbd5e1;
  --border2: #94a3b8;
  --text: #0f172a;
  --text2: #475569;
  --muted: #64748b;
  --accent: #0284c7;
  --accent2: #4f46e5;
  --accent3: #7c3aed;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --shadow: 0 20px 50px rgba(0,0,0,.12);
  --bubble-user: linear-gradient(135deg, rgba(2,132,199,.12), rgba(14,165,233,.08));
  --bubble-user-border: rgba(2,132,199,.3);
  --bubble-bot: #ffffff;
}

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

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: var(--font-size);
  background: var(--bg);
  color: var(--text);
  min-height: 100%;
  line-height: 1.6;
  transition: background .3s, color .3s;
  background-image:
    radial-gradient(ellipse 80% 50% at 15% -20%, rgba(56,189,248,.08), transparent),
    radial-gradient(ellipse 60% 40% at 90% 110%, rgba(129,140,248,.06), transparent);
}

[data-theme="light"] body {
  background-image:
    radial-gradient(ellipse 80% 50% at 15% -20%, rgba(2,132,199,.06), transparent),
    radial-gradient(ellipse 60% 40% at 90% 110%, rgba(79,70,229,.05), transparent);
}

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

/* دکمه‌ها */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .9rem;
  font-family: var(--font);
  cursor: pointer;
  border: none;
  transition: var(--transition);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-ghost {
  background: var(--bg3);
  color: var(--text2);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 12px; font-size: .78rem; border-radius: 9px; }
.btn-danger {
  background: rgba(248,113,113,.15);
  color: var(--danger);
  border: 1px solid rgba(248,113,113,.3);
}
.btn-success {
  background: rgba(52,211,153,.15);
  color: var(--success);
  border: 1px solid rgba(52,211,153,.3);
}

/* فرم */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: .78rem;
  color: var(--text2);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: .92rem;
  font-family: var(--font);
  outline: none;
  transition: var(--transition);
}
.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56,189,248,.12);
}
textarea.form-control { resize: vertical; min-height: 80px; }

/* کارت */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

/* پیام وضعیت */
.alert {
  padding: 12px 14px;
  border-radius: 10px;
  font-size: .85rem;
  margin-top: 12px;
  display: none;
}
.alert.show { display: block; }
.alert-error { background: rgba(248,113,113,.12); color: #fca5a5; border: 1px solid rgba(248,113,113,.25); }
.alert-success { background: rgba(52,211,153,.12); color: #6ee7b7; border: 1px solid rgba(52,211,153,.25); }
.alert-info { background: rgba(56,189,248,.1); color: var(--accent); border: 1px solid rgba(56,189,248,.25); }

/* لوگو */
.logo-box {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  box-shadow: 0 0 35px rgba(56,189,248,.3);
  margin: 0 auto 16px;
}

/* تم سوییچ */
.theme-toggle {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 50;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--text2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ========== صفحات ورود / ثبت‌نام ========== */
.auth-layout {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  position: relative;
}

.auth-box {
  width: 100%;
  max-width: 420px;
}

.auth-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px 28px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.auth-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}

.auth-card h1 {
  text-align: center;
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.auth-card .sub {
  text-align: center;
  font-size: .8rem;
  color: var(--muted);
  margin-bottom: 22px;
}

.auth-links {
  text-align: center;
  margin-top: 18px;
  font-size: .85rem;
  color: var(--text2);
}
.auth-links a { font-weight: 600; }

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
  color: var(--muted);
  font-size: .76rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.btn-google {
  background: #fff;
  color: #1f2937;
  border: 1px solid #e5e7eb;
  font-weight: 600;
  width: 100%;
}
.btn-google:hover { background: #f8fafc; }

/* Guest panel روی صفحه ورود */
.guest-panel {
  width: 100%;
  max-width: 480px;
  margin-bottom: 20px;
}
.guest-panel .card { padding: 20px; }
.guest-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.guest-header .g-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.guest-header h2 { font-size: 1.05rem; margin: 0; }
.guest-remain { font-size: .75rem; color: var(--muted); }

.guest-chat {
  height: 280px;
  overflow-y: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 10px;
  -webkit-overflow-scrolling: touch;
}
.g-msg { display: flex; gap: 8px; margin-bottom: 12px; }
.g-msg.user { flex-direction: row-reverse; }
.g-avatar {
  width: 28px; height: 28px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .7rem; color: #fff; flex-shrink: 0;
}
.g-msg.user .g-avatar { background: linear-gradient(135deg, var(--accent), #0ea5e9); }
.g-msg.bot .g-avatar { background: linear-gradient(135deg, var(--accent2), var(--accent3)); }
.g-bubble {
  max-width: 85%;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: .84rem;
  line-height: 1.65;
  word-break: break-word;
}
.g-msg.user .g-bubble {
  background: var(--bubble-user);
  border: 1px solid var(--bubble-user-border);
}
.g-msg.bot .g-bubble {
  background: var(--bg3);
  border: 1px solid var(--border);
}

.guest-input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}
.guest-input-row textarea {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 16px;
  font-family: var(--font);
  outline: none;
  resize: none;
  max-height: 90px;
  min-height: 42px;
  line-height: 1.5;
}
.guest-input-row textarea:focus { border-color: var(--accent); }
.guest-send {
  width: 44px; height: 44px; border-radius: 12px; border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.guest-send:disabled { opacity: .5; cursor: not-allowed; }

.guest-lock {
  text-align: center;
  padding: 18px 12px;
  background: var(--bg3);
  border-radius: 14px;
  border: 1px solid var(--border);
}
.guest-lock p {
  font-size: .88rem;
  color: var(--text2);
  margin-bottom: 14px;
  line-height: 1.7;
}

.auth-page-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
  justify-content: center;
  width: 100%;
  max-width: 960px;
}

@media (max-width: 900px) {
  .auth-page-wrap { flex-direction: column; align-items: center; }
  .guest-panel { order: -1; }
  .guest-chat { height: 220px; }
}

/* ========== Toast ========== */
.toast {
  position: fixed;
  bottom: calc(24px + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--bg4);
  border: 1px solid var(--border2);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 14px;
  font-size: .88rem;
  z-index: 999;
  transition: .3s;
  opacity: 0;
  pointer-events: none;
  box-shadow: var(--shadow);
  max-width: 90%;
  text-align: center;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* ========== اسکریپت تم مشترک ========== */
/* در هر صفحه این JS را بگذار:
function initTheme(){
  const t=localStorage.getItem('arsam_theme')||'dark';
  document.documentElement.setAttribute('data-theme',t);
}
function toggleTheme(){
  const c=document.documentElement.getAttribute('data-theme')||'dark';
  const n=c==='dark'?'light':'dark';
  document.documentElement.setAttribute('data-theme',n);
  localStorage.setItem('arsam_theme',n);
  const btn=document.getElementById('themeBtn');
  if(btn) btn.innerHTML=n==='dark'?'<i class="fa-solid fa-sun"></i>':'<i class="fa-solid fa-moon"></i>';
}
*/