/* ============================================================
   MADKHAL × JIC — style.css
   Light / Dark mode + Centered Hero
   ============================================================ */

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

/* ── DARK MODE (default) ─────────────────────────────────── */
:root {
  --clr-bg:          #0b0d11;
  --clr-surface:     #12151c;
  --clr-surface-2:   #181c26;
  --clr-border:      rgba(255,255,255,0.07);
  --clr-accent:      #2261e8;
  --clr-accent-dim:  rgba(34, 143, 232, 0.12);
  --clr-accent-glow: rgba(34, 126, 232, 0.35);
  --clr-text:        #e8eaf0;
  --clr-text-muted:  #7a8099;
  --clr-text-faint:  #424866;
  --clr-success:     #22c55e;
  --clr-danger:      #ef4444;
  --clr-header-bg:   rgba(11,13,17,0.85);
  --clr-toggle-icon: '☀️';
  --clr-grid-line:   rgba(255,255,255,0.025);
  --clr-nav-hover:   rgba(255,255,255,0.06);
  --clr-mobile-link-hover: rgba(255,255,255,0.04);

  /* Typography */
  --font-heading: 'Cairo', sans-serif;
  --font-body:    'Tajawal', sans-serif;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;

  /* Radius */
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   22px;
  --radius-xl:   32px;
  --radius-full: 999px;

  /* Transitions */
  --ease:        cubic-bezier(0.4,0,0.2,1);
  --ease-spring: cubic-bezier(0.34,1.56,0.64,1);
  --dur:         0.28s;
  --theme-dur:   0.45s;
}

/* ── LIGHT MODE ──────────────────────────────────────────── */
[data-theme="light"] {
  --clr-bg:          #f5f6fa;
  --clr-surface:     #ffffff;
  --clr-surface-2:   #f0f2f8;
  --clr-border:      rgba(0, 0, 0, 0.08);
  --clr-accent:      #0a7ac4;
  --clr-accent-dim:  rgba(10, 122, 196, 0.1);
  --clr-accent-glow: rgba(10, 128, 196, 0.28);
  --clr-text:        #111318;
  --clr-text-muted:  #4a5068;
  --clr-text-faint:  #aab0c8;
  --clr-success:     #16a34a;
  --clr-danger:      #dc2626;
  --clr-header-bg:   rgba(245,246,250,0.90);
  --clr-grid-line:   rgba(0,0,0,0.04);
  --clr-nav-hover:   rgba(0,0,0,0.05);
  --clr-mobile-link-hover: rgba(0,0,0,0.03);
}

/* ── THEME TRANSITION ────────────────────────────────────── */
body,
.header,
.stats-card,
.calc-card,
.madkhal-card,
.footer,
.programs-strip,
.mobile-nav,
.field-input,
.formula-chip,
.visual-grid__cell {
  transition:
    background var(--theme-dur) var(--ease),
    border-color var(--theme-dur) var(--ease),
    color var(--theme-dur) var(--ease),
    box-shadow var(--theme-dur) var(--ease);
}

/* ── BASE ────────────────────────────────────────────────── */
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  overflow-x: hidden;
  direction: rtl;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

a { color: inherit; text-decoration: none; }

/* ── REVEAL ──────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal:nth-child(3) { transition-delay: 0.16s; }
.reveal:nth-child(4) { transition-delay: 0.24s; }

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition:
    transform var(--dur) var(--ease-spring),
    box-shadow var(--dur) var(--ease),
    background var(--dur) var(--ease),
    color var(--dur) var(--ease);
}
.btn--primary {
  background: var(--clr-accent);
  color: #fff;
}
[data-theme="light"] .btn--primary { color: #fff; }
.btn--primary:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 32px var(--clr-accent-glow);
}
.btn--ghost {
  background: transparent;
  color: var(--clr-text);
  border: 1.5px solid var(--clr-border);
}
.btn--ghost:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  transform: translateY(-2px);
}
.btn--calc {
  width: 100%;
  justify-content: center;
  background: var(--clr-accent);
  color: #fff;
  font-size: 1.1rem;
  padding: 1rem 2rem;
  margin-top: 0.5rem;
}
.btn--calc:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 36px var(--clr-accent-glow);
}
.btn--lg { padding: 1rem 2.4rem; font-size: 1.1rem; }
.btn--sm { padding: 0.5rem 1.2rem; font-size: 0.85rem; }
.btn__arrow { display: inline-block; transition: transform var(--dur) var(--ease); }
.btn:hover .btn__arrow { transform: translateX(-4px); }

/* ── LOGO ────────────────────────────────────────────────── */
/* ضبط مقاس الشعار */
.header__logo img {
  height: 45px; 
  width: auto;
}

/* الوضع الفاتح (الافتراضي): إخفاء شعار الدارك وإظهار شعار اللايت */
.logo-dark {
  display: none;
}
.logo-light {
  display: block;
}

/* الوضع الليلي: إخفاء شعار اللايت وإظهار شعار الدارك */
/* ضفت لك أشهر الكلاسات اللي تستخدمها سكربتات التبديل عشان يضبط معك مباشرة */
body.dark .logo-light,
body.dark-mode .logo-light,
[data-theme="dark"] .logo-light {
  display: none !important;
}

body.dark .logo-dark,
body.dark-mode .logo-dark,
[data-theme="dark"] .logo-dark {
  display: block !important;
}

/* ── HEADER ──────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0; right: 0; left: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background var(--theme-dur) var(--ease),
    border-color var(--dur) var(--ease),
    backdrop-filter var(--dur) var(--ease);
}
.header.is-scrolled {
  background: var(--clr-header-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-color: var(--clr-border);
}

.header__inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* ── THEME TOGGLE BUTTON ─────────────────────────────────── */
.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--clr-surface-2);
  border: 1.5px solid var(--clr-border);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  transition:
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease-spring),
    box-shadow var(--dur) var(--ease);
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover {
  transform: scale(1.1) rotate(15deg);
  border-color: var(--clr-accent);
  box-shadow: 0 0 14px var(--clr-accent-glow);
}
.theme-toggle__icon {
  display: block;
  transition: transform 0.4s var(--ease-spring), opacity 0.3s var(--ease);
  line-height: 1;
}

.nav-link {
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.9rem; font-weight: 500;
  color: var(--clr-text-muted);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-link:hover, .nav-link.active {
  color: var(--clr-text);
  background: var(--clr-nav-hover);
}

.nav-cta {
  margin-right: 0.5rem;
  padding: 0.45rem 1.2rem;
  background: var(--clr-accent-dim);
  color: var(--clr-accent);
  border: 1px solid rgba(34, 80, 232, 0.3);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.9rem; font-weight: 600;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-cta:hover {
  background: var(--clr-accent);
  color: #fff;
  box-shadow: 0 4px 18px var(--clr-accent-glow);
}

.header__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.header__burger span {
  display: block; height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), background var(--theme-dur) var(--ease);
}
.header__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__burger.is-open span:nth-child(2) { opacity: 0; }
.header__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.4s var(--ease);
}
.mobile-nav.is-open { max-height: 320px; }
.mobile-nav__link {
  display: block;
  padding: 1rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 1rem; font-weight: 500;
  color: var(--clr-text-muted);
  border-bottom: 1px solid var(--clr-border);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.mobile-nav__link:hover { color: var(--clr-text); background: var(--clr-mobile-link-hover); }
.mobile-nav__cta { color: var(--clr-accent); font-weight: 700; }

/* Mobile: theme toggle inside drawer */
.mobile-nav__theme {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: right;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.mobile-nav__theme:hover { color: var(--clr-accent); background: var(--clr-mobile-link-hover); }

/* ── HERO (CENTERED) ─────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(68px + 4rem) 0 5rem;
  overflow: hidden;
  text-align: center;
}

.hero__bg { position: absolute; inset: 0; pointer-events: none; }
.hero__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
}
.hero__blob--1 {
  width: 520px; height: 520px;
  top: -120px; right: -80px;
  background: radial-gradient(circle, rgba(34, 136, 232, 0.14) 0%, transparent 70%);
}
.hero__blob--2 {
  width: 400px; height: 400px;
  bottom: -80px; left: -60px;
  background: radial-gradient(circle, rgba(100,120,200,0.1) 0%, transparent 70%);
}
[data-theme="light"] .hero__blob--1 {
  background: radial-gradient(circle, rgba(10, 97, 196, 0.12) 0%, transparent 70%);
}
[data-theme="light"] .hero__blob--2 {
  background: radial-gradient(circle, rgba(80,100,200,0.07) 0%, transparent 70%);
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--clr-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 0%, transparent 100%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  width: 100%;
}

/* Content — centered */
.hero__content {
  max-width: 720px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: var(--clr-accent-dim);
  border: 1px solid rgba(34, 80, 232, 0.25);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.8rem; font-weight: 600;
  color: var(--clr-accent);
  margin-bottom: 1.5rem;
}
.badge__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--clr-accent);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%,100% { box-shadow: 0 0 0 0 var(--clr-accent-glow); }
  50% { box-shadow: 0 0 0 6px transparent; }
}

.hero__title {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.title__line {
  font-size: clamp(3rem, 8vw, 5.5rem);
  display: block;
  color: var(--clr-text);
}
.title__line--accent {
  color: var(--clr-accent);
  text-shadow: 0 0 60px var(--clr-accent-glow);
}

.hero__lead {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 500;
  color: var(--clr-text-muted);
  margin-bottom: 1.2rem;
  line-height: 1.6;
  max-width: 600px;
}

.hero__body {
  font-size: 0.97rem;
  color: var(--clr-text-muted);
  line-height: 1.85;
  margin-bottom: 2rem;
  max-width: 620px;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}

/* Stats Row (horizontal under content) */
.hero__stats { width: 100%; max-width: 720px; }
.stats-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 1.8rem 2rem;
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}
.stats-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--clr-accent), transparent);
}

.stats-card__item { text-align: center; flex: 1; }
.stats-card__num-wrap {
  display: flex; align-items: baseline; justify-content: center; gap: 2px;
}
.stats-card__number {
  font-family: var(--font-heading);
  font-size: 2.4rem; font-weight: 900;
  color: var(--clr-accent); line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stats-card__suffix {
  font-family: var(--font-heading);
  font-size: 1.3rem; font-weight: 700;
  color: var(--clr-accent);
}
.stats-card__label {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  margin-top: 0.35rem;
  line-height: 1.4;
}
.stats-card__divider {
  width: 1px; height: 60px;
  background: var(--clr-border);
  flex-shrink: 0;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center;
}
.scroll-indicator__line {
  width: 1.5px; height: 48px;
  background: linear-gradient(to bottom, var(--clr-accent), transparent);
  animation: scroll-line 1.8s ease-in-out infinite;
}
@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  50.01% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ── PROGRAMS STRIP ──────────────────────────────────────── */
.programs-strip {
  overflow: hidden;
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
  background: var(--clr-surface);
}
.programs-strip__track { overflow: hidden; padding: 1rem 0; }
.programs-strip__inner {
  display: flex;
  gap: 3rem;
  width: max-content;
  animation: strip-scroll 24s linear infinite;
}
.programs-strip__inner span {
  white-space: nowrap;
  font-family: var(--font-heading);
  font-size: 0.88rem; font-weight: 600;
  color: var(--clr-text-muted);
  transition: color var(--dur) var(--ease);
}
.programs-strip__inner span:hover { color: var(--clr-accent); }
@keyframes strip-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ── SECTION HEADER ──────────────────────────────────────── */
.section-header { text-align: center; margin-bottom: var(--space-lg); }
.section-header__eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.8rem; font-weight: 700;
  color: var(--clr-accent);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 0.75rem;
  padding: 0.3rem 1rem;
  background: var(--clr-accent-dim);
  border-radius: var(--radius-full);
  border: 1px solid rgba(34, 87, 232, 0.2);
}
.section-header__title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; color: var(--clr-text);
  margin-bottom: 0.75rem;
}
.section-header__sub {
  color: var(--clr-text-muted);
  font-size: 1rem;
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── CALCULATOR ──────────────────────────────────────────── */
.calculator-section { padding: var(--space-2xl) 0; }

.calc-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 4vw, 3rem);
  max-width: 620px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}
.calc-card::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(34, 87, 232, 0.05) 0%, transparent 70%);
  pointer-events: none;
}
[data-theme="light"] .calc-card::after {
  background: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(10, 60, 196, 0.04) 0%, transparent 70%);
}

.calc-formula {
  display: flex; align-items: center; justify-content: center;
  gap: 0.75rem; flex-wrap: wrap;
  margin-bottom: 2rem; padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--clr-border);
}
.formula-chip {
  display: flex; flex-direction: column; align-items: center; gap: 0.2rem;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 0.6rem 1rem; min-width: 80px;
}
.formula-chip__label { font-family: var(--font-heading); font-size: 0.8rem; font-weight: 600; color: var(--clr-text-muted); }
.formula-chip__weight { font-family: var(--font-heading); font-size: 1.15rem; font-weight: 800; color: var(--clr-accent); }
.formula-op { font-family: var(--font-heading); font-size: 1.4rem; font-weight: 300; color: var(--clr-text-faint); }

.calc-form { display: flex; flex-direction: column; gap: 1.25rem; }
.field-group { display: flex; flex-direction: column; gap: 0.4rem; }
.field-label {
  display: flex; align-items: center; gap: 0.4rem;
  font-family: var(--font-heading); font-size: 0.88rem; font-weight: 600;
  color: var(--clr-text); cursor: pointer;
}
.field-label__icon { font-size: 1rem; }

.field-input-wrap { position: relative; display: flex; align-items: center; }
.field-input {
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 3rem;
  background: var(--clr-surface-2);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: 1.05rem; font-weight: 500;
  color: var(--clr-text);
  outline: none;
  direction: ltr; text-align: center;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--theme-dur) var(--ease), color var(--theme-dur) var(--ease);
}
.field-input::placeholder { color: var(--clr-text-faint); font-weight: 400; }
.field-input:focus {
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px var(--clr-accent-dim);
}
.field-input.is-error {
  border-color: var(--clr-danger);
  box-shadow: 0 0 0 3px rgba(239,68,68,0.12);
}
.field-suffix {
  position: absolute; left: 1rem;
  font-family: var(--font-heading); font-size: 0.95rem; font-weight: 600;
  color: var(--clr-text-muted); pointer-events: none;
}
.field-hint { font-size: 0.78rem; color: var(--clr-text-faint); }

/* Result */
.calc-result {
  display: flex; align-items: center; gap: 2rem;
  padding-top: 2rem; flex-wrap: wrap; justify-content: center;
}
.result-ring { position: relative; width: 130px; height: 130px; flex-shrink: 0; }
.result-ring__svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.result-ring__track { fill: none; stroke: var(--clr-surface-2); stroke-width: 8; }
.result-ring__fill {
  fill: none; stroke: var(--clr-accent); stroke-width: 8; stroke-linecap: round;
  stroke-dasharray: 314; stroke-dashoffset: 314;
  transition: stroke-dashoffset 1s var(--ease);
  filter: drop-shadow(0 0 8px var(--clr-accent-glow));
}
.result-ring__inner {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center; gap: 1px;
}
.result-ring__score {
  font-family: var(--font-heading); font-size: 1.9rem; font-weight: 900;
  color: var(--clr-text); line-height: 1;
}
.result-ring__pct {
  font-family: var(--font-heading); font-size: 0.9rem; font-weight: 700;
  color: var(--clr-text-muted); align-self: flex-end; padding-bottom: 0.2rem;
}
.result-meta { display: flex; flex-direction: column; gap: 0.5rem; text-align: center; }
.result-meta__label { font-family: var(--font-heading); font-size: 0.85rem; color: var(--clr-text-muted); }
.result-meta__badge {
  display: inline-block; padding: 0.3rem 1rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading); font-size: 0.85rem; font-weight: 700;
}
.result-meta__badge.badge--excellent { background: rgba(34,197,94,0.12); color: var(--clr-success); border: 1px solid rgba(34,197,94,0.25); }
.result-meta__badge.badge--good      { background: var(--clr-accent-dim);  color: var(--clr-accent);  border: 1px solid rgba(34, 37, 232, 0.25); }
.result-meta__badge.badge--low       { background: rgba(239,68,68,0.10);   color: var(--clr-danger);  border: 1px solid rgba(239,68,68,0.20); }
.result-meta__note { font-size: 0.82rem; color: var(--clr-text-muted); max-width: 220px; line-height: 1.5; }
.calc-error {
  margin-top: 1rem; padding: 0.7rem 1rem;
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading); font-size: 0.85rem;
  color: var(--clr-danger); text-align: center;
}

/* ── ABOUT MADKHAL ───────────────────────────────────────── */
.about-madkhal { padding: var(--space-2xl) 0; }

.madkhal-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 5vw, 4rem);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem; align-items: center;
  position: relative; overflow: hidden;
}
.madkhal-card__deco { position: absolute; inset: 0; pointer-events: none; }
.deco-circle { position: absolute; border-radius: 50%; }
.deco-circle--1 {
  width: 300px; height: 300px; top: -100px; left: -60px;
  background: radial-gradient(circle, rgba(34, 80, 232, 0.07) 0%, transparent 70%);
}
.deco-circle--2 {
  width: 200px; height: 200px; bottom: -60px; right: 200px;
  background: radial-gradient(circle, rgba(100,140,240,0.05) 0%, transparent 70%);
}
.madkhal-card__content { position: relative; z-index: 1; }
.madkhal-card__eyebrow {
  display: inline-block;
  font-family: var(--font-heading); font-size: 0.78rem; font-weight: 700;
  color: var(--clr-accent); letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 0.75rem;
  padding: 0.25rem 0.9rem;
  background: var(--clr-accent-dim);
  border-radius: var(--radius-full);
  border: 1px solid rgba(34, 54, 232, 0.2);
}
.madkhal-card__title {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800; color: var(--clr-text);
  margin-bottom: 1rem; line-height: 1.2;
}
.madkhal-card__body {
  font-size: 0.97rem; color: var(--clr-text-muted);
  line-height: 1.85; margin-bottom: 2rem; max-width: 520px;
}
.madkhal-card__body strong { color: var(--clr-accent); }

.madkhal-card__visual { position: relative; z-index: 1; flex-shrink: 0; }
.visual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.visual-grid__cell {
  width: 80px; height: 80px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  border-radius: var(--radius-lg);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  transition: transform var(--dur) var(--ease-spring), border-color var(--dur) var(--ease), background var(--theme-dur) var(--ease);
}
.visual-grid__cell:hover { transform: scale(1.1) rotate(-4deg); border-color: var(--clr-accent); }
.visual-grid__cell--a { animation: float 5s ease-in-out infinite; }
.visual-grid__cell--b { animation: float 5s ease-in-out 0.7s infinite; }
.visual-grid__cell--c { animation: float 5s ease-in-out 1.4s infinite; }
.visual-grid__cell--d { animation: float 5s ease-in-out 2.1s infinite; }
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ── FOOTER ──────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--clr-border);
  padding: 1.8rem 0;
  background: var(--clr-surface);
}
.footer__inner {
  display: flex; align-items: center;
  justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.footer__brand { display: flex; align-items: center; gap: 0.5rem; }
.footer__copy {
  font-size: 0.82rem; color: var(--clr-text-faint);
  font-family: var(--font-heading);
}
.footer__link {
  font-family: var(--font-heading); font-size: 0.82rem;
  color: var(--clr-text-muted);
  border-bottom: 1px solid var(--clr-text-faint);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer__link:hover { color: var(--clr-accent); border-color: var(--clr-accent); }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .madkhal-card { grid-template-columns: 1fr; gap: 2rem; }
  .madkhal-card__visual { display: flex; justify-content: center; }
}

@media (max-width: 680px) {
  .header__nav { display: none; }
  .header__burger { display: flex; }
  .mobile-nav { display: flex; }

  .stats-card { flex-direction: column; gap: 1.2rem; padding: 1.5rem; }
  .stats-card__divider { width: 100%; height: 1px; }

  .hero__actions { flex-direction: column; align-items: center; }

  .footer__inner { flex-direction: column; align-items: center; text-align: center; }
}

@media (max-width: 420px) {
  .calc-formula { gap: 0.4rem; }
  .formula-chip { min-width: 65px; padding: 0.5rem 0.6rem; }
  .formula-chip__weight { font-size: 1rem; }
  .formula-op { font-size: 1.1rem; }
}