/* MB MEDIA — Built for MOHAMAD BASSEM MEFTAH — mftahbassem@gmail.com */
/* MB MEDIA — 2048. كل القواعد معزولة تحت #mb-app؛ الاستثناءات: تعريف المتغيرات + @font-face. */

/* 3. الهوية البصرية */
:root {
  --navy:  #0E1B2E;
  --cyan:  #17B4D6;
  --white: #FFFFFF;
  --coral: #E8734A;
}

/* 4. الوضع الداكن (الافتراضي) / الفاتح */
:root {
  color-scheme: dark;
  --bg:            var(--navy);
  --fg:            var(--white);
  --bg-soft:       #16233B;
  --bg-softer:     #1C2C47;
  --border:        rgba(255, 255, 255, 0.13);
  --border-strong: rgba(255, 255, 255, 0.30);
  --fg-muted:      #A9B7CC;
  --fg-faint:      #76859E;
  --cyan-ink:      var(--cyan);
  --cyan-soft:     rgba(23, 180, 214, 0.14);
  --cyan-soft-2:   rgba(23, 180, 214, 0.24);
  --coral-hover:   #F0815B;
  --coral-glow:    rgba(232, 115, 74, 0.30);
  --board-bg:      #131F33;
  --board-cell:    rgba(255, 255, 255, 0.055);
  --overlay-bg:    rgba(14, 27, 46, 0.82);
  --card-bg:       var(--bg-soft);
  --shadow:        0 18px 40px rgba(0, 0, 0, 0.35);
  --radius:        14px;
  --radius-lg:     18px;
  --move-ms:       130ms;
}

[data-theme="light"] {
  color-scheme: light;
  --bg:            #EFF4F9;
  --fg:            var(--navy);
  --bg-soft:       #FFFFFF;
  --bg-softer:     #E6EEF5;
  --border:        rgba(14, 27, 46, 0.14);
  --border-strong: rgba(14, 27, 46, 0.32);
  --fg-muted:      #47576E;
  --fg-faint:      #7B889E;
  --cyan-ink:      #0B7E9C;
  --cyan-soft:     rgba(11, 143, 174, 0.12);
  --cyan-soft-2:   rgba(11, 143, 174, 0.22);
  --board-bg:      #DCE6F0;
  --board-cell:    rgba(14, 27, 46, 0.08);
  --overlay-bg:    rgba(232, 238, 245, 0.85);
  --card-bg:       #FFFFFF;
  --shadow:        0 18px 40px rgba(14, 27, 46, 0.14);
}
html, body { background: var(--bg); }

/* الخطوط المحلية (vendor/fonts) — الأسماء المستعارة تمنع تصادم الخطوط عند الدمج بالموقع. الرخص: CREDITS.md */
@font-face {
  font-family: "MB Sans Arabic"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("./vendor/fonts/ibmplexarabic-400-arabic.woff2") format("woff2");
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC, U+102E0-102FB, U+10E60-10E7E, U+10EC2-10EC4, U+10EFC-10EFF, U+1EE00-1EE03, U+1EE05-1EE1F, U+1EE21-1EE22, U+1EE24, U+1EE27, U+1EE29-1EE32, U+1EE34-1EE37, U+1EE39, U+1EE3B, U+1EE42, U+1EE47, U+1EE49, U+1EE4B, U+1EE4D-1EE4F, U+1EE51-1EE52, U+1EE54, U+1EE57, U+1EE59, U+1EE5B, U+1EE5D, U+1EE5F, U+1EE61-1EE62, U+1EE64, U+1EE67-1EE6A, U+1EE6C-1EE72, U+1EE74-1EE77, U+1EE79-1EE7C, U+1EE7E, U+1EE80-1EE89, U+1EE8B-1EE9B, U+1EEA1-1EEA3, U+1EEA5-1EEA9, U+1EEAB-1EEBB, U+1EEF0-1EEF1;
}
@font-face {
  font-family: "MB Sans Arabic"; font-style: normal; font-weight: 700; font-display: swap;
  src: url("./vendor/fonts/ibmplexarabic-700-arabic.woff2") format("woff2");
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC, U+102E0-102FB, U+10E60-10E7E, U+10EC2-10EC4, U+10EFC-10EFF, U+1EE00-1EE03, U+1EE05-1EE1F, U+1EE21-1EE22, U+1EE24, U+1EE27, U+1EE29-1EE32, U+1EE34-1EE37, U+1EE39, U+1EE3B, U+1EE42, U+1EE47, U+1EE49, U+1EE4B, U+1EE4D-1EE4F, U+1EE51-1EE52, U+1EE54, U+1EE57, U+1EE59, U+1EE5B, U+1EE5D, U+1EE5F, U+1EE61-1EE62, U+1EE64, U+1EE67-1EE6A, U+1EE6C-1EE72, U+1EE74-1EE77, U+1EE79-1EE7C, U+1EE7E, U+1EE80-1EE89, U+1EE8B-1EE9B, U+1EEA1-1EEA3, U+1EEA5-1EEA9, U+1EEAB-1EEBB, U+1EEF0-1EEF1;
}
@font-face {
  font-family: "MB Mono"; font-style: normal; font-weight: 500; font-display: swap;
  src: url("./vendor/fonts/jetbrainsmono-500-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

#mb-app {
  --font-sans: "MB Sans Arabic", system-ui, -apple-system, "Segoe UI", Tahoma, Arial, sans-serif;
  --font-mono: "MB Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

/* BASE — بلا لمس لـ html/body أو عناصر عامة */
#mb-app {
  box-sizing: border-box;
  min-height: 100dvh;
  margin-inline: auto;
  padding: 20px 16px 44px;
  max-width: 520px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-block: 16px;
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  text-align: start;
  transition: background-color 0.25s ease, color 0.25s ease;
}
#mb-app *, #mb-app *::before, #mb-app *::after { box-sizing: inherit; }
#mb-app [hidden] { display: none !important; }
#mb-app button { font: inherit; color: inherit; cursor: pointer; touch-action: manipulation; }
#mb-app svg { display: block; flex: none; }
#mb-app :focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

/* الرأس: اسم اللعبة + زر السمة */
#mb-app .mb-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-block-end: 14px; }
#mb-app .mb-brand { display: grid; gap: 2px; }
#mb-app .mb-eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em; color: var(--cyan-ink); text-transform: uppercase; }
#mb-app .mb-title { margin: 0; font-family: var(--font-mono); font-size: clamp(2.4rem, 14vw, 3.6rem); font-weight: 500; line-height: 1.05; letter-spacing: -0.02em; color: var(--cyan-ink); direction: ltr; text-align: start; }

#mb-app .mb-icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; flex: none;
  border: 1px solid transparent; border-radius: 12px; background: transparent; color: var(--fg-muted);
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}
#mb-app .mb-icon-btn:hover, #mb-app .mb-icon-btn:focus-visible { color: var(--cyan-ink); border-color: var(--border-strong); background: var(--cyan-soft); }
#mb-app .mb-icon-btn:active { background: var(--cyan-soft-2); }
#mb-app .mb-icon-btn svg { width: 22px; height: 22px; }
#mb-app .mb-head__actions { display: flex; align-items: center; gap: 8px; }
#mb-app .mb-lang-btn__label { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.04em; }

/* شريط النقاط */
#mb-app .mb-scorebar { display: flex; gap: 10px; margin-block-end: 12px; }
#mb-app .mb-score { flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-soft); }
#mb-app .mb-score__label { margin: 0; font-size: 0.74rem; font-weight: 700; color: var(--fg-muted); }
#mb-app .mb-score__value { margin: 4px 0 0; font-family: var(--font-mono); font-size: clamp(1.3rem, 7vw, 1.7rem); font-weight: 500; line-height: 1.1; direction: ltr; text-align: start; }
#mb-app .mb-score--best .mb-score__value { color: var(--cyan-ink); }
#mb-app .mb-score-pop { animation: mb-score-pop 0.2s ease; }

/* اللوحة — شبكة مطلقة الموضع، direction:ltr كي يبقى اليمين/اليسار فيزيائياً
   ثابتاً مهما كان اتجاه الصفحة RTL (شرح مطوّل في README) */
#mb-app .mb-board {
  --n: 4; --gap: 10px; --pad: 10px; --cell: 56px;
  position: relative; width: 100%; max-width: 460px; margin-inline: auto;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  background: var(--board-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  direction: ltr;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}
#mb-app .mb-board__grid {
  position: absolute; inset: 0;
  display: grid;
  grid-template-columns: repeat(var(--n), 1fr);
  grid-template-rows: repeat(var(--n), 1fr);
  gap: var(--gap);
  padding: var(--pad);
}
#mb-app .mb-board__grid > span {
  border-radius: calc(var(--cell) * 0.16);
  background: var(--board-cell);
}
#mb-app .mb-board__tiles { position: absolute; inset: 0; }

#mb-app .mb-tile {
  position: absolute; top: 0; left: 0;
  width: var(--cell); height: var(--cell);
  transform: translate(
    calc(var(--pad) + var(--c) * (var(--cell) + var(--gap))),
    calc(var(--pad) + var(--r) * (var(--cell) + var(--gap)))
  );
  transition: transform var(--move-ms) ease-in-out;
  will-change: transform;
}
#mb-app .mb-tile__inner {
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%;
  border-radius: calc(var(--cell) * 0.16);
  font-family: var(--font-mono);
  font-weight: 500; line-height: 1;
  background: #06101E;           /* افتراضي للقيم الأعلى من 2048 */
  color: var(--white);
  direction: ltr;
  font-variant-numeric: tabular-nums;
  transform: scale(1);
}
#mb-app .mb-tile--appear { animation: mb-tile-appear 180ms ease-out; }
#mb-app .mb-tile--pop { animation: mb-tile-pop 200ms ease; z-index: 2; }
#mb-app .mb-tile--fade { opacity: 0; transition: opacity 90ms linear; }
#mb-app .mb-board--resizing .mb-tile { transition: none; }

/* أحجام الخط حسب عدد الأرقام */
#mb-app .mb-tile__inner[data-d="1"] { font-size: calc(var(--cell) * 0.50); }
#mb-app .mb-tile__inner[data-d="2"] { font-size: calc(var(--cell) * 0.44); }
#mb-app .mb-tile__inner[data-d="3"] { font-size: calc(var(--cell) * 0.36); }
#mb-app .mb-tile__inner[data-d="4"] { font-size: calc(var(--cell) * 0.30); }
#mb-app .mb-tile__inner[data-d="5"] { font-size: calc(var(--cell) * 0.26); }
#mb-app .mb-tile__inner[data-d="6"] { font-size: calc(var(--cell) * 0.22); }

/* --------------------------------------------------------------------------
   3. تدرّج ألوان البلاطات — مشتق من --navy و--cyan حصراً (فاتح → أغمق)
   --coral غير مستخدم للبلاطات نهائياً (حصراً لزر "لعبة جديدة")
   النص: navy على البلاطات الفاتحة، أبيض على الداكنة — تباين مقروء بالوضعين
   -------------------------------------------------------------------------- */
#mb-app .mb-tile__inner[data-v="2"]    { background: #F2FAFD; color: var(--navy); }
#mb-app .mb-tile__inner[data-v="4"]    { background: #D5F1F8; color: var(--navy); }
#mb-app .mb-tile__inner[data-v="8"]    { background: #A8E4F1; color: var(--navy); }
#mb-app .mb-tile__inner[data-v="16"]   { background: #5CCFE6; color: var(--navy); }
#mb-app .mb-tile__inner[data-v="32"]   { background: #1FBAD9; color: var(--navy); }
#mb-app .mb-tile__inner[data-v="64"]   { background: #17A6C9; color: var(--navy); }
#mb-app .mb-tile__inner[data-v="128"]  { background: #0F7D99; color: var(--white); }
#mb-app .mb-tile__inner[data-v="256"]  { background: #0E6C87; color: var(--white); }
#mb-app .mb-tile__inner[data-v="512"]  { background: #0D4E66; color: var(--white); }
#mb-app .mb-tile__inner[data-v="1024"] { background: #0C314A; color: var(--white); }
#mb-app .mb-tile__inner[data-v="2048"] {
  background: #0A1B2E;
  color: var(--white);
  box-shadow: inset 0 0 0 2px rgba(23, 180, 214, 0.65), 0 0 18px rgba(23, 180, 214, 0.35);
}

/* النوافذ */
#mb-app .mb-overlay {
  position: absolute; inset: 0; z-index: 10;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  border-radius: var(--radius-lg);
  background: var(--overlay-bg);
  direction: rtl;
}
/* في الوضع الإنجليزي تتبع النافذة اتجاه الصفحة (ltr) بدل اتجاه اللوحة */
#mb-app[data-lang="en"] .mb-overlay { direction: ltr; }
#mb-app .mb-overlay__card {
  width: 100%; max-width: 300px;
  padding: 22px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  box-shadow: var(--shadow);
  text-align: center;
}
#mb-app .mb-overlay__title { margin: 0 0 8px; font-family: var(--font-mono); font-size: 1.5rem; font-weight: 500; color: var(--cyan-ink); }
#mb-app .mb-overlay__text { margin: 0 0 18px; font-size: 0.92rem; color: var(--fg-muted); }
#mb-app .mb-overlay__actions { display: grid; gap: 10px; }

/* الأزرار */
#mb-app .mb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%; min-height: 48px; padding: 0 20px;
  border-radius: 12px; border: 1px solid transparent;
  font-size: 1rem; font-weight: 700;
  transition: transform 0.12s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
#mb-app .mb-btn:active { transform: translateY(1px); }
#mb-app .mb-btn svg { width: 20px; height: 20px; }
#mb-app .mb-btn--new { background: var(--coral); color: var(--white); box-shadow: 0 10px 26px var(--coral-glow); }
#mb-app .mb-btn--new:hover { background: var(--coral-hover); }
#mb-app .mb-btn--ghost { background: transparent; border-color: var(--cyan-ink); color: var(--cyan-ink); }
#mb-app .mb-btn--ghost:hover { background: var(--cyan-soft); }

#mb-app .mb-actions { display: grid; gap: 10px; margin-block-start: 14px; }
#mb-app .mb-hint { margin: 0; text-align: center; font-size: 0.78rem; color: var(--fg-faint); }

/* الميزات الإضافية */
#mb-app .mb-extras { margin-block-start: 18px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-soft); }
#mb-app .mb-extras > summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 52px; padding: 0 16px; cursor: pointer; list-style: none; user-select: none; }
#mb-app .mb-extras > summary::-webkit-details-marker { display: none; }
#mb-app .mb-extras__summary { font-weight: 700; font-size: 0.9rem; }
#mb-app .mb-extras__group { display: flex; align-items: center; gap: 8px; }
#mb-app .mb-extras__chevron { width: 18px; height: 18px; color: var(--fg-muted); transition: transform 0.2s ease; }
#mb-app .mb-extras[open] .mb-extras__chevron { transform: rotate(180deg); }
#mb-app .mb-extras__body { display: grid; gap: 18px; padding: 14px 16px 16px; border-block-start: 1px solid var(--border); }
#mb-app .mb-extras__block { display: grid; gap: 10px; }
#mb-app .mb-extras__label { display: flex; align-items: center; gap: 8px; margin: 0; font-size: 0.82rem; font-weight: 700; color: var(--fg-muted); }
#mb-app .mb-extras__label svg { width: 17px; height: 17px; color: var(--cyan-ink); }

#mb-app .mb-premium-badge { display: inline-flex; align-items: center; gap: 5px; padding: 2px 9px; border-radius: 999px; background: var(--cyan-soft); border: 1px solid var(--cyan-soft-2); color: var(--cyan-ink); font-size: 0.66rem; font-weight: 700; letter-spacing: 0.03em; line-height: 1.4; white-space: nowrap; }
#mb-app .mb-premium-badge svg { width: 12px; height: 12px; }

#mb-app .mb-chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
#mb-app .mb-chip {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 16px;
  border-radius: 12px; border: 1px solid var(--border-strong);
  background: transparent; color: var(--fg-muted);
  font-size: 0.9rem; font-weight: 600;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
#mb-app .mb-chip:hover { color: var(--cyan-ink); border-color: var(--cyan-ink); }
#mb-app .mb-chip[aria-pressed="true"] { background: var(--cyan-soft); border-color: var(--cyan-ink); color: var(--cyan-ink); }

#mb-app .mb-history__empty { margin: 0; font-size: 0.84rem; color: var(--fg-faint); }
#mb-app .mb-history__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
#mb-app .mb-history__list li { display: flex; align-items: center; gap: 10px; padding: 7px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg-soft); }
#mb-app .mb-history__rank { font-family: var(--font-mono); font-size: 0.78rem; color: var(--fg-faint); min-inline-size: 22px; text-align: center; }
#mb-app .mb-history__score { font-family: var(--font-mono); font-size: 1rem; font-weight: 500; direction: ltr; }
#mb-app .mb-history__list time { margin-inline-start: auto; font-size: 0.72rem; color: var(--fg-faint); }

#mb-app .mb-link { background: none; border: none; padding: 0; color: var(--cyan-ink); font-size: 0.8rem; font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
#mb-app .mb-link:hover { color: var(--fg); }

#mb-app .mb-stats { display: flex; flex-wrap: wrap; gap: 8px 18px; }
#mb-app .mb-stats__item { margin: 0; font-size: 0.86rem; color: var(--fg-muted); }
#mb-app .mb-stats__item b { font-family: var(--font-mono); font-size: 1rem; font-weight: 500; direction: ltr; color: var(--fg); }

#mb-app .mb-footnote { margin: 18px 0 0; text-align: center; font-size: 0.72rem; color: var(--fg-faint); }
#mb-app .mb-live { position: absolute; inline-size: 1px; block-size: 1px; opacity: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* حركة مخففة */
@media (prefers-reduced-motion: reduce) {
  #mb-app {
    --move-ms: 0ms;
  }
  #mb-app *, #mb-app *::before, #mb-app *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@keyframes mb-tile-appear {
  from { transform: scale(0); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
@keyframes mb-tile-pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.16); }
  100% { transform: scale(1); }
}
@keyframes mb-score-pop {
  0% { transform: scale(1); }
  40% { transform: scale(1.22); }
  100% { transform: scale(1); }
}