/* =================================================================
   فني سخان مركزية بالرياض — ملف التنسيق (RTL / عربي)
   جميع الألوان والخطوط معرّفة كمتغيرات في :root — لتغيير الهوية
   البصرية للموقع كاملاً، غيّر القيم هنا فقط.
   ================================================================= */

:root{
  /* ---- ألوان ---- */
  --ink:      #0F2A3D;   /* كحلي غامق — العناوين والأقسام الداكنة   */
  --slate:    #3C5A6B;   /* أزرق رمادي ثانوي                        */
  --copper:   #C1682E;   /* اللون الأساسي — نحاس/دفء                */
  --ember:    #E8A33D;   /* لون ثانوي — تمييز الدفء                 */
  --sand:     #F5F0E6;   /* خلفية فاتحة دافئة                       */
  --paper:    #FFFFFF;
  --charcoal: #1D2A2E;   /* لون نص المحتوى                          */
  --line:     rgba(15,42,61,0.12);

  /* ---- الخطوط ---- */
  --font-display: 'Cairo', 'Tahoma', sans-serif;
  --font-body:    'Tajawal', 'Tahoma', sans-serif;
  --font-mono:    'Cairo', 'Tahoma', sans-serif;

  /* ---- تخطيط ---- */
  --max-w: 1180px;
  --radius: 14px;
  --shadow: 0 12px 32px rgba(15,42,61,0.10);
}

/* ---------------------------------------------------------------
   إعادة ضبط أساسية + دعم الاتجاه من اليمين لليسار
   --------------------------------------------------------------- */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
/* الاتجاه (RTL/LTR) يُقرأ تلقائياً من خاصية dir في وسم <html> —
   لا نفرضه هنا حتى تعمل نفس الملف مع الصفحات العربية والإنجليزية معاً. */
body{
  margin: 0;
  font-family: var(--font-body);
  color: var(--charcoal);
  background: var(--paper);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* أرقام الجوال دائماً من اليسار لليمين، حتى داخل نص عربي RTL —
   يمنع هذا انعكاس ترتيب الأرقام أو علامة + */
.ltr-nums{ direction: ltr; unicode-bidi: isolate; display: inline-block; }
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
h1, h2, h3{ font-family: var(--font-display); color: var(--ink); margin: 0 0 .5em; line-height: 1.35; font-weight: 700; }
p{ margin: 0 0 1em; }
.wrap{ max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

:focus-visible{ outline: 3px solid var(--ember); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------------------------------------------------------------
   أزرار
   --------------------------------------------------------------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .75em 1.4em;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .95rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn:hover{ transform: translateY(-1px); }
.btn-primary {
    background: #25D366;
    border-color: #25D366;
    color: #fff;
}
.btn-primary:hover{ background: #1EA952; }
.btn-outline{ background: transparent; border-color: rgba(255,255,255,0.55); color: #fff; }
.btn-outline:hover{ border-color: #fff; background: rgba(255,255,255,0.08); }
.btn-ghost{ background: transparent; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover{ border-color: var(--copper); color: var(--copper); }
.btn-lg{ padding: .9em 1.7em; font-size: 1.02rem; }

/* ---------------------------------------------------------------
   الهيدر
   --------------------------------------------------------------- */
.site-header{
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display: flex; align-items: center; justify-content: space-between;
  height: 78px; gap: 20px;
}
.brand{ display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand-mark{ color: var(--ink); display: inline-flex; }
.brand-text{ font-family: var(--font-display); font-weight: 800; font-size: 1.18rem; }
.main-nav{ display: flex; gap: 24px; }
.main-nav a{ font-weight: 600; font-size: .96rem; color: var(--slate); transition: color .15s ease; }
.main-nav a:hover, .main-nav a.active{ color: var(--copper); }
.header-cta{ display: flex; align-items: center; gap: 10px; }
.header-cta .btn-ghost{ font-family: var(--font-mono); }

.lang-switch{
  display: inline-flex; align-items: center; justify-content: center;
  padding: .5em 1em; border-radius: 999px; border: 1.5px solid var(--line);
  font-family: var(--font-mono); font-weight: 700; font-size: .85rem;
  color: var(--ink); transition: border-color .15s ease, color .15s ease;
}
.lang-switch:hover{ border-color: var(--copper); color: var(--copper); }

.nav-toggle{
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; background: none; border: none; cursor: pointer;
}
.nav-toggle span{ display:block; width: 22px; height: 2px; background: var(--ink); }

/* ---------------------------------------------------------------
   الهيرو
   --------------------------------------------------------------- */
.hero{
  background:
    radial-gradient(1100px 500px at 15% -10%, rgba(232,163,61,0.16), transparent 60%),
    linear-gradient(180deg, var(--sand), var(--paper));
  padding: 70px 0 60px;
}
.hero-inner{
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}
.eyebrow{
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--copper);
  font-weight: 700;
  margin: 0 0 14px;
}
.eyebrow-light{ color: var(--ember); }
.hero h1{
  font-size: clamp(1.9rem, 4vw, 3rem);
}
.hero-lead{
  font-size: 1.1rem;
  color: var(--slate);
  max-width: 48ch;
}
.hero-actions{ display: flex; gap: 12px; flex-wrap: wrap; margin: 26px 0 34px; }
.hero-actions .btn-outline{ border-color: rgba(15,42,61,0.25); color: var(--ink); }
.hero-actions .btn-outline:hover{ border-color: var(--ink); background: rgba(15,42,61,0.05); }

.hero-facts{ display: flex; gap: 26px; flex-wrap: wrap; }
.hero-facts li{ display: flex; flex-direction: column; gap: 2px; }
.hero-facts strong{ font-family: var(--font-mono); font-size: .96rem; color: var(--ink); }
.hero-facts span{ font-size: .84rem; color: var(--slate); }

.hero-visual{ display: flex; justify-content: center; }
.gauge-svg{ width: 100%; max-width: 420px; height: auto; }
.gauge-ring-bg{ fill: none; stroke: rgba(15,42,61,0.08); stroke-width: 14; }
.gauge-ring-fg{
  fill: none; stroke: var(--ember); stroke-width: 14; stroke-linecap: round;
  transform-origin: 240px 240px; transform: rotate(-90deg);
  animation: ring-fill 1.6s ease-out .2s both;
}
@keyframes ring-fill{ from{ stroke-dasharray: 0 100; } }
.gauge-label-cold{ font-family: var(--font-mono); font-size: 14px; fill: var(--slate); }
.gauge-label-hot{ font-family: var(--font-mono); font-size: 14px; fill: var(--copper); }
.gauge-temp{ font-family: var(--font-display); font-size: 42px; font-weight: 800; fill: var(--ink); }
.gauge-needle{ animation: needle-swing 1.8s cubic-bezier(.2,.9,.2,1) .1s both; }
@keyframes needle-swing{
  0%{ transform: rotate(-95deg); }
  100%{ transform: rotate(0deg); }
}
.tank-icon rect{ filter: drop-shadow(0 8px 14px rgba(15,42,61,0.18)); }

/* ---------------------------------------------------------------
   شريط الثقة
   --------------------------------------------------------------- */
.trust-strip{ background: var(--ink); padding: 22px 0; }
.trust-grid{
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.trust-item{
  display: flex; align-items: center; gap: 10px;
  color: #EAF0F3; font-size: .9rem; font-weight: 600;
}
.trust-item svg{ flex-shrink: 0; color: var(--ember); }

/* ---------------------------------------------------------------
   أقسام مشتركة
   --------------------------------------------------------------- */
.section{ padding: 80px 0; }
.section-tint{ background: var(--sand); }
.section-dark{ background: var(--ink); color: #D8E1E6; }
.section-dark h2, .h-light{ color: #fff; }
.section-lead{ font-size: 1.06rem; color: var(--slate); max-width: 65ch; }
.section-lead-light{ color: #A9BAC4; }
.section h2{ font-size: clamp(1.55rem, 3vw, 2.2rem); max-width: 26ch; }

/* صفحة داخلية — هيدر صغير أعلى الصفحات الفرعية */
.page-hero{
  background: linear-gradient(180deg, var(--sand), var(--paper));
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--line);
}
.breadcrumb{ font-size: .85rem; color: var(--slate); margin-bottom: 10px; }
.breadcrumb a{ color: var(--slate); }
.breadcrumb a:hover{ color: var(--copper); }
.page-hero h1{ font-size: clamp(1.7rem, 3.4vw, 2.5rem); max-width: 32ch; }
.page-hero p{ color: var(--slate); max-width: 65ch; font-size: 1.02rem; }

/* ---------------------------------------------------------------
   الخدمات
   --------------------------------------------------------------- */
.service-grid{
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 40px;
}
.service-card{
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: box-shadow .2s ease, transform .2s ease;
}
.service-card:hover{ box-shadow: var(--shadow); transform: translateY(-3px); }
.service-icon{
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(193,104,46,0.08);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.service-card h3{ font-size: 1.12rem; margin-bottom: 8px; }
.service-card p{ color: var(--slate); font-size: .95rem; margin: 0; }

/* ---------------------------------------------------------------
   قطع الغيار
   --------------------------------------------------------------- */
.parts-grid{
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px;
}
.part-card{
  display: flex; flex-direction: column; gap: 12px; align-items: flex-start;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius); padding: 20px;
  font-weight: 600; font-size: .96rem; color: #EAF0F3;
  transition: background .2s ease, border-color .2s ease;
}
.part-card:hover{ background: rgba(255,255,255,0.08); border-color: rgba(232,163,61,0.4); }
.parts-note{
  margin-top: 36px; padding: 26px 28px; border-radius: var(--radius);
  background: rgba(232,163,61,0.08); border: 1px solid rgba(232,163,61,0.25);
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
}
.parts-note p{ margin: 0; max-width: 58ch; color: #EAF0F3; }

/* ---------------------------------------------------------------
   معرض الأعمال
   --------------------------------------------------------------- */
.gallery-grid{
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px;
}
.gallery-grid figure{ margin: 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); position: relative; }
.gallery-grid img{ width: 100%; height: 260px; object-fit: cover; transition: transform .35s ease; }
.gallery-grid figure:hover img{ transform: scale(1.04); }
.gallery-grid figcaption{
  position: absolute; inset: auto 0 0 0; padding: 14px 16px 12px;
  background: linear-gradient(0deg, rgba(15,42,61,0.85), transparent);
  color: #fff; font-size: .85rem; font-weight: 600;
}
.gallery-hint{ margin-top: 18px; font-size: .88rem; color: var(--slate); }

/* ---------------------------------------------------------------
   آلية العمل
   --------------------------------------------------------------- */
.process-grid{
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px;
}
.step-num{
  font-family: var(--font-mono); color: var(--copper); font-weight: 800;
  font-size: .9rem; display: block; margin-bottom: 10px;
}
.process-step h3{ font-size: 1.06rem; margin-bottom: 6px; }
.process-step p{ color: var(--slate); font-size: .95rem; margin: 0; }

/* ---------------------------------------------------------------
   مناطق التغطية
   --------------------------------------------------------------- */
.areas-layout{
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start;
}
.areas-list{
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 24px; margin-top: 22px;
}
.areas-list li{
  font-size: .97rem; color: var(--charcoal); padding-inline-start: 18px; position: relative;
}
.areas-list li::before{
  content: ""; position: absolute; inset-inline-start: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--copper);
}
.areas-map{
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  height: 380px; border: 1px solid var(--line);
}

/* ---------------------------------------------------------------
   من نحن
   --------------------------------------------------------------- */
.about-layout{ display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.about-stats{ display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 30px; }
.stat-card{ background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; text-align: center; }
.stat-num{ font-family: var(--font-display); font-size: 1.9rem; font-weight: 800; color: var(--copper); display: block; }
.stat-label{ font-size: .85rem; color: var(--slate); margin-top: 4px; }
.about-photo{ border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.about-photo img{ width: 100%; height: 100%; object-fit: cover; }
.values-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 40px; }
.value-card{ background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.value-card h3{ font-size: 1.05rem; margin-bottom: 8px; }
.value-card p{ color: var(--slate); font-size: .94rem; margin: 0; }

/* ---------------------------------------------------------------
   الأسئلة الشائعة
   --------------------------------------------------------------- */
.faq-list{ margin-top: 36px; display: grid; gap: 12px; max-width: 78ch; }
.faq-item{ background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 22px; }
.faq-item summary{ cursor: pointer; padding: 16px 0; font-weight: 700; color: var(--ink); font-size: 1rem; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.faq-item summary::-webkit-details-marker{ display: none; }
.faq-item summary::after{ content: "+"; font-size: 1.4rem; color: var(--copper); flex-shrink: 0; }
.faq-item[open] summary::after{ content: "−"; }
.faq-item p{ color: var(--slate); padding-bottom: 18px; margin: 0; font-size: .96rem; }

/* ---------------------------------------------------------------
   تواصل معنا
   --------------------------------------------------------------- */
.contact-layout{
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start;
}
.contact-methods{ margin-top: 28px; display: grid; gap: 14px; }
.contact-method{
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; border-radius: 12px;
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.10);
  transition: background .2s ease, border-color .2s ease;
}
a.contact-method:hover{ background: rgba(255,255,255,0.08); border-color: rgba(232,163,61,0.4); }
.contact-method span{ display: flex; flex-direction: column; font-size: .96rem; }
.contact-method strong{ font-size: .76rem; letter-spacing: 0; color: var(--ember); font-weight: 700; }

.contact-form{
  background: #fff; border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow);
  color: var(--charcoal);
}
.contact-form h3{ margin-bottom: 18px; }
.contact-form label{ display: block; font-size: .88rem; font-weight: 700; color: var(--slate); margin-bottom: 14px; }
.contact-form input, .contact-form textarea{
  display: block; width: 100%; margin-top: 6px; padding: .7em .9em;
  border: 1.5px solid var(--line); border-radius: 8px; font-family: var(--font-body);
  font-size: .96rem; color: var(--charcoal); background: var(--paper);
  transition: border-color .15s ease;
}
.contact-form input:focus, .contact-form textarea:focus{ border-color: var(--copper); outline: none; }
.contact-form .btn{ width: 100%; margin-top: 4px; }
.form-note{ font-size: .8rem; color: var(--slate); margin: 12px 0 0; }

/* ---------------------------------------------------------------
   الفوتر
   --------------------------------------------------------------- */
.site-footer{ background: #08161f; color: #90A2AC; padding: 44px 0 26px; }
.footer-inner{ display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 32px; text-align: right; }
.footer-col h4{ color: #EAF0F3; font-family: var(--font-display); font-size: 1rem; margin: 0 0 14px; }
.site-footer .brand{ color: #fff; margin-bottom: 10px; }
.site-footer p{ margin: 0 0 8px; font-size: .9rem; max-width: 42ch; }
.footer-col ul{ display: grid; gap: 8px; }
.footer-col a{ font-size: .88rem; color: #90A2AC; transition: color .15s ease; }
.footer-col a:hover{ color: var(--ember); }
.footer-contact{ font-family: var(--font-mono); color: #D8E1E6 !important; }
.footer-bottom{ border-top: 1px solid rgba(255,255,255,0.08); margin-top: 32px; padding-top: 20px; text-align: center; }
.footer-copy{ font-size: .8rem !important; color: #5E6E76 !important; margin: 0; }

/* ---------------------------------------------------------------
   زر واتساب العائم
   --------------------------------------------------------------- */
.float-whatsapp{
  position: fixed; bottom: 22px; right: 22px; z-index: 60;
  width: 56px; height: 56px; border-radius: 50%;
  background: #1EA952; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 24px rgba(30,169,82,0.4);
  transition: transform .15s ease;
}
.float-whatsapp:hover{ transform: scale(1.06); }

/* =================================================================
   استجابة الشاشات
   ================================================================= */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ order: -1; max-width: 300px; margin: 0 auto; }
  .trust-grid{ grid-template-columns: repeat(2, 1fr); }
  .service-grid{ grid-template-columns: repeat(2, 1fr); }
  .parts-grid{ grid-template-columns: repeat(2, 1fr); }
  .process-grid{ grid-template-columns: repeat(2, 1fr); }
  .areas-layout, .contact-layout, .about-layout{ grid-template-columns: 1fr; }
  .areas-map{ height: 300px; }
  .gallery-grid{ grid-template-columns: 1fr 1fr; }
  .values-grid{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr; text-align: center; }
  .about-photo{ order: -1; }
}

@media (max-width: 720px){
  .main-nav{
    position: absolute; top: 78px; right: 0; left: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; padding: 12px 24px; gap: 4px;
    display: none;
  }
  .main-nav.open{ display: flex; }
  .main-nav a{ padding: 10px 0; border-bottom: 1px solid var(--line); }
  .header-cta .btn-ghost{ display: none; }
  .lang-switch{ padding: .4em .8em; font-size: .78rem; }
  .nav-toggle{ display: flex; }
  .service-grid, .parts-grid, .process-grid{ grid-template-columns: 1fr; }
  .gallery-grid{ grid-template-columns: 1fr; }
  .trust-grid{ grid-template-columns: 1fr; }
  .trust-item{ justify-content: center; }
  .hero{ padding-top: 36px; }
  .about-stats{ grid-template-columns: 1fr 1fr; }
}
