/* ============================================================
   1) الألوان والمتغيرات العامة (فاتح + داكن)
   ============================================================ */
:root {
  --accent:        #0ea5e9;
  --accent-dark:   #0369a1;
  --accent-light:  #e0f2fe;
  --accent-rgb:    14, 165, 233;

  --green:  #16a34a;
  --amber:  #d97706;
  --red:    #dc2626;

  --bg:        #eef3f8;
  --bg-grad-1: #f4f8fc;
  --bg-grad-2: #e6eef8;
  --panel:     #ffffff;
  --panel-alpha: rgba(255, 255, 255, 0.72);
  --text:      #1e293b;
  --text-soft: #64748b;
  --border:    #dbe6f0;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 36px rgba(15, 23, 42, 0.14);

  color-scheme: light;
}

html[data-theme="dark"] {
  --accent:        #38bdf8;
  --accent-dark:   #0ea5e9;
  --accent-light:  #0c2333;
  --accent-rgb:    56, 189, 248;

  --green:  #22c55e;
  --amber:  #f59e0b;
  --red:    #f87171;

  --bg:        #0b1220;
  --bg-grad-1: #0b1220;
  --bg-grad-2: #0f1b2d;
  --panel:     #121b2d;
  --panel-alpha: rgba(18, 27, 45, 0.75);
  --text:      #e6edf5;
  --text-soft: #93a4bd;
  --border:    #223047;

  --shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);

  color-scheme: dark;
}

/* ============================================================
   2) إعدادات عامة
   ============================================================ */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Tajawal", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, var(--bg-grad-2), var(--bg-grad-1));
  background-attachment: fixed;
  color: var(--text);
  transition: background 0.25s ease, color 0.25s ease;
  -webkit-font-smoothing: antialiased;
}

h1, h2, p { margin: 0; }

button { font-family: inherit; }

::selection { background: rgba(var(--accent-rgb), 0.3); }

/* شريط تمرير أنيق */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; }
::-webkit-scrollbar-track { background: transparent; }

/* ============================================================
   3) شريط تنبيه فقدان الاتصال
   ============================================================ */
.connection-banner {
  position: sticky;
  top: 0;
  z-index: 60;
  text-align: center;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(90deg, var(--red), #ef4444);
  animation: slideDown 0.25s ease;
}

@keyframes slideDown {
  from { transform: translateY(-100%); }
  to   { transform: translateY(0); }
}

/* ============================================================
   4) الهيدر
   ============================================================ */
.site-header {
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.brand { display: flex; align-items: center; gap: 14px; }

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  flex-shrink: 0;
}

.brand-text h1 { color: #ffffff; font-size: 21px; font-weight: 800; letter-spacing: -0.2px; }
.brand-text p  { color: var(--accent-light); font-size: 12.5px; opacity: 0.9; }

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

.mode-badge {
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
}

.conn-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
}

.conn-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 6px #4ade80;
}

.conn-indicator.offline .conn-dot {
  background: var(--red);
  box-shadow: 0 0 6px var(--red);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: none;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}

.icon-btn:hover { background: rgba(255, 255, 255, 0.26); transform: translateY(-1px); }

/* ============================================================
   5) شريط إرشادي
   ============================================================ */
.hint-banner {
  max-width: 1240px;
  margin: 14px auto 0;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--accent-light);
  color: var(--accent-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
}

.hint-banner button {
  background: transparent;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: 14px;
  opacity: 0.7;
}

.hint-banner.hidden { display: none; }

/* ============================================================
   6) تخطيط الصفحة الرئيسي
   ============================================================ */
.main {
  max-width: 1240px;
  margin: 24px auto 40px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 24px;
  align-items: start;
}

.panel {
  background: var(--panel-alpha);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  animation: fadeUp 0.35s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.section-label {
  display: block;
  font-size: 14.5px;
  font-weight: 800;
  color: var(--accent-dark);
  margin-bottom: 12px;
  padding-right: 10px;
  border-right: 4px solid var(--accent);
}

/* ============================================================
   7) صندوق الكاميرا
   ============================================================ */
.camera-box {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #05080f;
  border: 2px solid var(--accent-dark);
  box-shadow: var(--shadow);
}

.camera-feed {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scaleX(-1);
}

.camera-overlay {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(15, 23, 42, 0.65);
  color: #ffffff;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 12px;
  z-index: 2;
}

.status-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: pulseDot 1.6s ease-in-out infinite;
}

.status-dot.paused {
  background: var(--amber);
  box-shadow: 0 0 6px var(--amber);
  animation: none;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.overlay-canvas { position: absolute; inset: 0; pointer-events: none; }

.camera-loading, .camera-error {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  text-align: center;
  padding: 16px;
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  background: rgba(5, 8, 15, 0.88);
  transition: opacity 0.2s ease;
}

.camera-loading.hidden { display: none; }

.camera-error-sub {
  font-weight: 500;
  font-size: 12.5px;
  color: #cbd5e1;
  margin-top: 6px;
}

.camera-retry { margin-top: 10px; width: auto; padding: 10px 22px; }

.spinner {
  width: 34px; height: 34px;
  border: 3px solid rgba(255,255,255,0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   8) أزرار اختيار اللغة
   ============================================================ */
.lang-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 16px 0;
}

/* ============================================================
   9) صندوق الحرف المكتشف
   ============================================================ */
.detect-box {
  text-align: center;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.ring-wrap {
  position: relative;
  width: 130px;
  height: 130px;
  margin: 10px auto 16px;
}

.ring-svg { width: 100%; height: 100%; transform: rotate(-90deg); }

.ring-bg { fill: none; stroke: var(--border); stroke-width: 9; }

.ring-fg {
  fill: none;
  stroke: var(--accent);
  stroke-width: 9;
  stroke-linecap: round;
  stroke-dasharray: 314.15;
  stroke-dashoffset: 314.15;
  transition: stroke-dashoffset 0.1s linear, stroke 0.2s ease;
  filter: drop-shadow(0 0 4px rgba(var(--accent-rgb), 0.5));
}

.ring-wrap .ring-letter {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  font-weight: 800;
  color: var(--text);
  transition: transform 0.18s ease, color 0.18s ease;
}

.ring-wrap .ring-letter.confirmed {
  color: var(--green);
  animation: popScale 0.28s ease;
}

@keyframes popScale {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.25); }
  100% { transform: scale(1); }
}

.conf-track {
  width: 100%;
  height: 10px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.conf-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-dark), var(--accent));
  border-radius: 999px;
  transition: width 0.15s ease;
}

.conf-label { margin-top: 8px; font-size: 13px; color: var(--text-soft); }

/* ============================================================
   10) الأزرار العامة
   ============================================================ */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text);
  transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s ease, filter 0.12s ease;
}

.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); filter: brightness(1.03); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn-lang { background: var(--accent-light); color: var(--accent-dark); }
.btn-lang.active { background: var(--accent); color: #ffffff; }

.btn-primary { background: var(--accent); color: #ffffff; }
.btn-outline { background: transparent; color: var(--accent-dark); border: 2px solid var(--border); }
.btn-danger  { background: rgba(220, 38, 38, 0.12); color: var(--red); }
.btn-success { background: rgba(22, 163, 74, 0.12); color: var(--green); }

.tracking-on  { background: var(--accent-light); color: var(--accent-dark); }
.tracking-off { background: rgba(217, 119, 6, 0.15); color: var(--amber); }

/* ============================================================
   11) لوحة النص
   ============================================================ */
.textbox {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  padding: 16px;
  font-family: inherit;
  font-size: 18px;
  line-height: 1.8;
  color: var(--text);
  background: var(--accent-light);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease;
}

.textbox:focus { outline: none; border-color: var(--accent); }

/* ============================================================
   12) قسم الترجمة
   ============================================================ */
.translate-block { margin-top: 26px; }

.translate-row { display: flex; gap: 10px; }

.select-input {
  flex: 1;
  padding: 0 12px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
}

.translate-row .btn { width: auto; padding: 12px 22px; }

.translation-output {
  margin-top: 12px;
  padding: 14px 16px;
  min-height: 50px;
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: 15px;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.translation-output.has-text {
  color: var(--text);
  border-style: solid;
  background: var(--accent-light);
}

/* ============================================================
   13) أدوات التحكم
   ============================================================ */
.controls-block { margin-top: 26px; }

.controls-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

/* ============================================================
   14) الفوتر
   ============================================================ */
.site-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-soft);
  font-size: 12.5px;
}

/* ============================================================
   15) التنبيهات (Toasts)
   ============================================================ */
.toast-container {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
  width: min(92vw, 380px);
}

.toast {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  font-size: 13.5px;
  font-weight: 600;
  animation: toastIn 0.2s ease, toastOut 0.2s ease 2.6s forwards;
}

.toast.success { border-inline-start: 4px solid var(--green); }
.toast.error   { border-inline-start: 4px solid var(--red); }
.toast.info    { border-inline-start: 4px solid var(--accent); }

@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(-6px); } }

/* ============================================================
   16) نافذة الإعدادات (Modal)
   ============================================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 15, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
  padding: 16px;
  animation: fadeIn 0.15s ease;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
  width: min(94vw, 420px);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 16px; font-weight: 800; }
.modal-header .icon-btn { background: var(--bg); color: var(--text); }
.modal-header .icon-btn:hover { background: var(--border); }

.modal-body { padding: 20px; display: flex; flex-direction: column; gap: 20px; }

.field-label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text);
}

.field-label input[type="range"] { width: 100%; accent-color: var(--accent); }

.switch-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.switch-row input[type="checkbox"] {
  width: 20px; height: 20px;
  accent-color: var(--accent);
}

[hidden] {
    display: none !important;
}

/* ============================================================
   17) التجاوب مع الشاشات الصغيرة
   ============================================================ */
@media (max-width: 900px) {
  .main { grid-template-columns: 1fr; }
  .header-inner { justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
  .controls-grid { grid-template-columns: repeat(2, 1fr); }
  .brand-text h1 { font-size: 17px; }
  .brand-text p { font-size: 11px; }
  .mode-badge, .conn-indicator { font-size: 11.5px; padding: 6px 10px; }
  .hint-banner { flex-direction: column; align-items: flex-start; }
}

/* تفضيل تقليل الحركة لمن يحتاجها */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}