:root {
  --bg-deep: #1B1330;
  --bg-elevated: #241B3D;
  --bg-card: #2C2149;
  --accent-1: #FF5F6D;
  --accent-2: #FFC371;
  --text-primary: #F5F1FF;
  --text-muted: #9A8FBF;
  --border: #392C5C;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --font-display: 'Cairo', system-ui, sans-serif;
  --font-body: 'Tajawal', system-ui, sans-serif;
  --font-utility: 'IBM Plex Sans Arabic', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: #0E0A1A;
  color: var(--text-primary);
  font-family: var(--font-body);
  direction: rtl;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: stretch;
}

#app {
  width: 100%;
  max-width: 480px;
  min-height: 100vh;
  background: var(--bg-deep);
  position: relative;
  display: flex;
  flex-direction: column;
  box-shadow: 0 0 60px rgba(0,0,0,0.5);
}

@media (min-width: 520px) {
  body { padding: 24px 0; }
  #app { min-height: calc(100vh - 48px); border-radius: 28px; overflow: hidden; }
}

/* ---------- شاشة البداية ---------- */
.splash {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.pulse-ring {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: conic-gradient(var(--accent-1), var(--accent-2), var(--accent-1));
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse 1.8s ease-in-out infinite;
}
.pulse-ring::after {
  content: "";
  width: 78px;
  height: 78px;
  border-radius: 50%;
  background: var(--bg-deep);
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}
@media (prefers-reduced-motion: reduce) {
  .pulse-ring { animation: none; }
}

.splash h1 {
  font-family: var(--font-display);
  font-size: 28px;
  margin: 0;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- المصادقة ---------- */
.auth-screen { flex: 1; display: flex; flex-direction: column; padding: 32px 24px; }

.auth-header { text-align: center; margin-bottom: 24px; }
.auth-header .logo-mark {
  width: 56px; height: 56px; border-radius: 16px; margin: 0 auto 12px;
  background: conic-gradient(var(--accent-1), var(--accent-2), var(--accent-1));
  display: flex; align-items: center; justify-content: center;
}
.auth-header .logo-mark span {
  width: 44px; height: 44px; border-radius: 12px; background: var(--bg-deep);
}
.auth-header h1 { font-family: var(--font-display); font-size: 24px; margin: 0 0 4px; }
.auth-header p { color: var(--text-muted); font-size: 14px; margin: 0; }

.tabs { display: flex; background: var(--bg-elevated); border-radius: 999px; padding: 4px; margin-bottom: 20px; }
.tab-btn {
  flex: 1; border: none; background: transparent; color: var(--text-muted);
  font-family: var(--font-display); font-weight: 700; font-size: 14px;
  padding: 10px 0; border-radius: 999px; cursor: pointer; transition: all .2s;
}
.tab-btn.active { background: linear-gradient(90deg, var(--accent-1), var(--accent-2)); color: #1B1330; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; font-family: var(--font-utility); }
.field input {
  width: 100%; padding: 13px 16px; border-radius: var(--radius-md);
  border: 1px solid var(--border); background: var(--bg-elevated);
  color: var(--text-primary); font-family: var(--font-body); font-size: 15px;
}
.field input:focus { outline: 2px solid var(--accent-1); outline-offset: 1px; }

.btn-primary {
  width: 100%; padding: 14px; border: none; border-radius: var(--radius-md);
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  color: #1B1330; font-family: var(--font-display); font-weight: 800; font-size: 15px;
  cursor: pointer; margin-top: 6px;
}
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.6; }

.form-error {
  background: rgba(255,95,109,0.12); border: 1px solid var(--accent-1);
  color: #FFB3B9; padding: 10px 14px; border-radius: var(--radius-sm);
  font-size: 13px; margin-bottom: 14px; display: none;
}
.form-error.show { display: block; }

.settings-link {
  text-align: center; margin-top: 20px; font-size: 12px; color: var(--text-muted);
  text-decoration: underline; cursor: pointer; background: none; border: none;
  font-family: var(--font-utility);
}

/* ---------- الشاشة الرئيسية ---------- */
.home-screen { display: none; flex: 1; flex-direction: column; }
.home-screen.active { display: flex; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 18px; border-bottom: 1px solid var(--border);
}
.topbar .brand { display: flex; align-items: center; gap: 8px; }
.topbar .brand-mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: conic-gradient(var(--accent-1), var(--accent-2), var(--accent-1));
}
.topbar h2 { font-family: var(--font-display); font-size: 19px; margin: 0; }

.stories-row {
  display: flex; gap: 14px; padding: 16px 18px; overflow-x: auto;
}
.story-item { display: flex; flex-direction: column; align-items: center; gap: 6px; flex-shrink: 0; }
.story-avatar {
  width: 60px; height: 60px; border-radius: 50%; padding: 3px;
  background: conic-gradient(var(--accent-1), var(--accent-2), var(--accent-1));
  display: flex; align-items: center; justify-content: center;
}
.story-avatar span {
  width: 100%; height: 100%; border-radius: 50%; background: var(--bg-card);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700; font-size: 16px;
}
.story-item small { font-size: 11px; color: var(--text-muted); font-family: var(--font-utility); }

.feed { flex: 1; padding: 4px 18px 90px; }
.empty-card {
  background: var(--bg-card); border: 1px dashed var(--border); border-radius: var(--radius-lg);
  padding: 28px 20px; text-align: center; margin-top: 16px;
}
.empty-card h3 { font-family: var(--font-display); margin: 0 0 6px; font-size: 16px; }
.empty-card p { color: var(--text-muted); font-size: 13px; margin: 0; line-height: 1.7; }

.bottom-nav {
  position: absolute; bottom: 0; left: 0; right: 0;
  display: flex; justify-content: space-around; align-items: center;
  padding: 12px 0; background: var(--bg-elevated); border-top: 1px solid var(--border);
}
.nav-icon { width: 24px; height: 24px; opacity: 0.55; cursor: pointer; }
.nav-icon.active { opacity: 1; }

.profile-card {
  display: flex; align-items: center; gap: 12px; padding: 14px 18px;
  background: var(--bg-card); margin: 12px 18px; border-radius: var(--radius-md);
}
.profile-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: conic-gradient(var(--accent-1), var(--accent-2), var(--accent-1));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700;
}
.profile-info strong { font-family: var(--font-display); font-size: 15px; }
.profile-info div { color: var(--text-muted); font-size: 12px; margin-top: 2px; }
.logout-btn {
  margin-inline-start: auto; background: none; border: 1px solid var(--border);
  color: var(--accent-1); padding: 7px 14px; border-radius: 999px; font-size: 12px; cursor: pointer;
}

/* ---------- نافذة إعداد رابط الـ Worker ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  display: none; align-items: center; justify-content: center; z-index: 50; padding: 20px;
}
.modal-backdrop.show { display: flex; }
.modal-box {
  background: var(--bg-elevated); border-radius: var(--radius-lg); padding: 22px; width: 100%; max-width: 380px;
  border: 1px solid var(--border);
}
.modal-box h3 { font-family: var(--font-display); margin: 0 0 8px; font-size: 16px; }
.modal-box p { color: var(--text-muted); font-size: 12px; margin: 0 0 14px; line-height: 1.6; }

/* ---------- بطاقات المنشورات ---------- */
.post-card {
  background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden;
  margin-top: 16px; border: 1px solid var(--border);
}
.post-head { display: flex; align-items: center; gap: 10px; padding: 12px 14px; }
.post-head .avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: conic-gradient(var(--accent-1), var(--accent-2), var(--accent-1));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700; font-size: 14px;
}
.post-head strong { font-size: 14px; font-family: var(--font-display); }
.post-head small { display: block; color: var(--text-muted); font-size: 11px; font-family: var(--font-utility); }

.post-media-wrap { width: 100%; background: #000; }
.post-media-wrap img, .post-media-wrap video {
  width: 100%; max-height: 480px; object-fit: cover; display: block;
}

.post-actions { display: flex; align-items: center; gap: 16px; padding: 10px 14px; }
.like-btn { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-primary); }
.like-btn.liked { color: var(--accent-1); }
.post-meta { padding: 0 14px 14px; font-size: 13px; }
.post-meta .likes-count { font-weight: 700; margin-bottom: 4px; }
.post-meta .caption { color: var(--text-primary); }
.post-meta .caption strong { font-family: var(--font-display); margin-inline-end: 6px; }

/* ---------- نافذة إنشاء منشور ---------- */
.post-preview-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin: 10px 0;
}
.post-preview-grid img, .post-preview-grid video {
  width: 100%; height: 80px; object-fit: cover; border-radius: var(--radius-sm);
}
.caption-input {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-md);
  border: 1px solid var(--border); background: var(--bg-elevated);
  color: var(--text-primary); font-family: var(--font-body); font-size: 14px; resize: vertical;
}