:root {
  --bg: #f3eee3;
  --surface: #ffffff;
  --ink: #2b2118;
  --ink-soft: #6b5d4e;
  --accent: #1f5c4a;
  --accent-deep: #154134;
  --gold: #b8862e;
  --full: #b33a3a;
  --border: #e3dac8;
  --radius: 14px;
  --shadow: 0 10px 30px -12px rgba(43, 33, 24, 0.18);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'IBM Plex Sans Arabic', sans-serif;
  direction: rtl;
  line-height: 1.6;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

/* ---------- الهيدر ---------- */
.page-header {
  text-align: center;
  margin-bottom: 36px;
}

.page-header h1 {
  font-family: 'Cairo', sans-serif;
  font-weight: 800;
  font-size: clamp(26px, 5vw, 36px);
  color: var(--accent-deep);
  margin: 0 0 8px;
}

.page-header p {
  color: var(--ink-soft);
  font-size: 15px;
  margin: 0;
}

/* ---------- بطاقة الكتاب ---------- */
.book-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.book-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.book-card.open { border-color: var(--accent); }

.book-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: right;
  font-family: inherit;
}

.book-info h3 {
  font-family: 'Cairo', sans-serif;
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--ink);
}

.book-info span {
  font-size: 13px;
  color: var(--ink-soft);
}

/* شريط/ربطة الكتاب - العنصر المميز اللي يوضح العدد المتبقي */
.ribbon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.ribbon.low { background: var(--gold); }
.ribbon::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  opacity: 0.85;
}

.chevron {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
  color: var(--ink-soft);
}
.book-card.open .chevron { transform: rotate(180deg); }

/* ---------- فورم الإدخال ---------- */
.book-form {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.book-card.open .book-form { max-height: 500px; }

.book-form-inner {
  padding: 0 20px 20px;
  border-top: 1px dashed var(--border);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  background: var(--bg);
  color: var(--ink);
}

.field input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  background: #fff;
}

.submit-btn {
  margin-top: 4px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease;
}
.submit-btn:hover { background: var(--accent-deep); }
.submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.form-msg {
  font-size: 13px;
  margin: 0;
}
.form-msg.error { color: var(--full); }
.form-msg.success { color: var(--accent-deep); }

/* ---------- حالة الفراغ ---------- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
}
.empty-state h2 {
  font-family: 'Cairo', sans-serif;
  color: var(--accent-deep);
  margin: 0 0 8px;
}
.empty-state p { color: var(--ink-soft); margin: 0; }

.loading {
  text-align: center;
  color: var(--ink-soft);
  padding: 40px 0;
}

@media (max-width: 480px) {
  .book-card-head { padding: 14px 16px; }
  .book-info h3 { font-size: 16px; }
}