/* ==========================================================
   فاتورة — design.css
   Mobile-First | CSS Variables | RTL Support | Arabic Optimized
   ========================================================== */

/* ── Google Fonts - Tajawal Arabic Font ── */
@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;700;800&display=swap');

/* ── CSS Variables ── */
:root{
  --c-bg:#f8f7f4;
  --c-surface:#ffffff;
  --c-border:#e8e4dc;
  --c-text:#1a1916;
  --c-muted:#6b6760;
  --c-accent:#2563eb;
  --c-accent-dark:#1d4ed8;
  --c-accent-light:#dbeafe;
  --c-green:#059669;
  --c-green-light:#d1fae5;
  --c-warning:#d97706;
  --c-warning-light:#fef3c7;
  --c-danger:#dc2626;

  --ff-display:'Tajawal',system-ui,sans-serif;
  --ff-body:'Tajawal',system-ui,sans-serif;

  --r-sm:6px;
  --r-md:12px;
  --r-lg:20px;
  --r-xl:28px;

  --shadow-sm:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);
  --shadow-md:0 4px 16px rgba(0,0,0,.1),0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:0 10px 40px rgba(0,0,0,.12),0 4px 12px rgba(0,0,0,.08);
  --shadow-accent:0 8px 32px rgba(37,99,235,.25);

  --transition:220ms cubic-bezier(.4,0,.2,1);
  --max-w:1180px;
  --gutter:16px;
}

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;direction:rtl}
body{
  font-family:var(--ff-body);
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.8;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  direction:rtl;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{cursor:pointer;font:inherit;border:none;background:none}
input,select,textarea{font:inherit;direction:rtl;text-align:right}

/* ── Layout ── */
.container{width:100%;max-width:var(--max-w);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:56px}
.section--lg{padding-block:80px}
.grid-2{display:grid;gap:24px}
.grid-3{display:grid;gap:20px}
.flex{display:flex}
.flex-center{display:flex;align-items:center;justify-content:center}
.gap-8{gap:8px}
.gap-12{gap:12px}
.gap-16{gap:16px}

/* ── Typography ── */
h1,h2,h3,h4{font-family:var(--ff-display);line-height:1.4;font-weight:800}
h1{font-size:clamp(2rem,6vw,3.5rem);letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,4vw,2.4rem);letter-spacing:-.01em}
h3{font-size:clamp(1.1rem,3vw,1.4rem);letter-spacing:0}
h4{font-size:1rem;letter-spacing:0}
p{color:var(--c-muted);line-height:1.9}
.text-accent{color:var(--c-accent)}
.text-center{text-align:center}
.text-muted{color:var(--c-muted);font-size:.875rem}
.lead{font-size:1.1rem;color:var(--c-muted);line-height:1.9}

/* ── Buttons ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-md);font-weight:600;font-size:.95rem;
  transition:var(--transition);white-space:nowrap;
}
.btn-primary{
  background:var(--c-accent);color:#fff;
  box-shadow:var(--shadow-accent);
}
.btn-primary:hover{background:var(--c-accent-dark);transform:translateY(-1px);box-shadow:0 12px 36px rgba(37,99,235,.35)}
.btn-primary:active{transform:translateY(0)}
.btn-secondary{
  background:var(--c-surface);color:var(--c-accent);
  border:1.5px solid var(--c-border);
}
.btn-secondary:hover{border-color:var(--c-accent);background:var(--c-accent-light)}
.btn-lg{padding:14px 32px;font-size:1rem}
.btn.w-full{width:100%}

/* ── Header / Navigation ── */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(248,247,244,.95);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-border);
  transition:var(--transition);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding-block:16px}
.nav-brand{font-family:var(--ff-display);font-weight:700;font-size:1.15rem;color:var(--c-text);display:flex;align-items:center;gap:4px}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{font-weight:600;font-size:.9rem;color:var(--c-muted);transition:var(--transition);padding:8px 12px;border-radius:var(--r-sm)}
.nav-links a:hover,.nav-links a.active{color:var(--c-accent)}
.nav-cta{display:flex;gap:12px}
.nav-hamburger{display:none;width:28px;height:28px;flex-direction:column;justify-content:center;gap:5px}
.nav-hamburger span{display:block;width:100%;height:2px;background:var(--c-text);border-radius:2px;transition:var(--transition)}
.nav-hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-hamburger.open span:nth-child(2){opacity:0}
.nav-hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-mobile{display:none;flex-direction:column;gap:8px;padding-block:16px;border-top:1px solid var(--c-border);margin-top:16px}
.nav-mobile.open{display:flex}
.nav-mobile a{padding:12px;font-weight:600;color:var(--c-muted);border-radius:var(--r-sm);transition:var(--transition)}
.nav-mobile a:hover{background:var(--c-accent-light);color:var(--c-accent)}

@media(max-width:768px){
  .nav-links,.nav-cta{display:none}
  .nav-hamburger{display:flex}
}

/* ── Site Logo (matches index.html standard) ── */
.site-logo{
  font-family:'Space Grotesk','Tajawal',sans-serif;font-weight:800;
  font-size:1.45rem;letter-spacing:-.02em;
  display:flex;align-items:center;
}
.site-logo .l1{color:var(--c-accent)}
.site-logo .l2{color:#94a3b8;font-weight:500;font-size:1.25rem}

/* ── Button sizes ── */
.btn-sm{padding:9px 20px;font-size:.88rem}

/* ── Footer brand logo spans ── */
.footer-brand .fl1{color:var(--c-accent)}
.footer-brand .fl2{color:rgba(255,255,255,.5);font-weight:500}

/* ── Hero ── */
.hero{padding-block:48px 64px;background:linear-gradient(to bottom,var(--c-bg),var(--c-surface))}
.hero-inner{display:grid;gap:40px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--c-green-light);color:var(--c-green);
  padding:6px 14px;border-radius:20px;font-size:.82rem;font-weight:600;
  width:fit-content;
}
.hero-badge svg{width:14px;height:14px}
.hero-title{margin-top:16px;margin-bottom:16px}
.hero-title em{font-style:normal;color:var(--c-accent)}
.hero-desc{margin-bottom:28px;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px}
.hero-trust{display:flex;flex-wrap:wrap;gap:16px;font-size:.85rem;color:var(--c-muted)}
.hero-trust-item{display:flex;align-items:center;gap:6px}
.hero-trust-item svg{width:16px;height:16px;color:var(--c-green)}
.hero-visual{margin-top:24px}

@media(min-width:768px){
  .hero-inner{grid-template-columns:1fr 1fr}
  .hero-visual{margin-top:0}
}

/* ── Page Hero (static pages) ── */
.page-hero{padding-block:48px;text-align:center;background:linear-gradient(to bottom,var(--c-bg),var(--c-surface))}
.page-hero h1{margin-bottom:12px}

/* ── Cards ── */
.card{background:var(--c-surface);border-radius:var(--r-lg);padding:28px;border:1px solid var(--c-border);transition:var(--transition)}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.card-icon{
  width:48px;height:48px;border-radius:var(--r-md);
  background:var(--c-accent-light);color:var(--c-accent);
  display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;
}
.card-icon svg{width:24px;height:24px}
.card h3{margin-bottom:8px}

/* ── Features Grid ── */
.features-grid{display:grid;gap:20px}
@media(min-width:640px){.features-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.features-grid{grid-template-columns:repeat(3,1fr)}}

/* ── Stats Row ── */
.stats-row{display:grid;gap:24px;text-align:center}
@media(min-width:640px){.stats-row{grid-template-columns:repeat(2,1fr)}}
@media(min-width:768px){.stats-row{grid-template-columns:repeat(4,1fr)}}
.stat-val{font-size:2.5rem;font-weight:800;color:var(--c-accent);line-height:1}
.stat-label{margin-top:8px;color:var(--c-muted);font-size:.9rem}

/* ── CTA Banner ── */
.cta-banner{
  background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark));
  color:#fff;padding:48px 32px;border-radius:var(--r-xl);
  text-align:center;box-shadow:var(--shadow-lg);
}
.cta-banner h2{color:#fff;margin-bottom:12px}
.cta-banner p{color:rgba(255,255,255,.9);margin-bottom:24px}
.cta-banner .btn-primary{background:#fff;color:var(--c-accent);box-shadow:0 4px 16px rgba(0,0,0,.15)}
.cta-banner .btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}

/* ── Invoice Builder ── */
.builder-section{background:var(--c-surface);padding-block:64px}
.builder-grid{display:grid;gap:32px}
@media(min-width:1024px){.builder-grid{grid-template-columns:1fr 1fr}}

.builder-form{background:var(--c-surface);border-radius:var(--r-xl);padding:32px;border:1px solid var(--c-border);box-shadow:var(--shadow-sm)}
.form-section{margin-bottom:32px}
.form-section:last-child{margin-bottom:0}
.form-section-title{
  font-size:1rem;font-weight:700;color:var(--c-text);
  margin-bottom:16px;padding-bottom:12px;
  border-bottom:2px solid var(--c-border);
}
.form-row{display:grid;gap:16px;margin-bottom:16px}
.form-row.cols-2{grid-template-columns:1fr 1fr}
.form-row.cols-3{grid-template-columns:1fr 1fr 1fr}
@media(max-width:640px){
  .form-row.cols-2,.form-row.cols-3{grid-template-columns:1fr}
}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:.85rem;font-weight:600;color:var(--c-text)}
.form-group input,.form-group select,.form-group textarea{
  padding:10px 14px;border-radius:var(--r-sm);
  border:1.5px solid var(--c-border);background:var(--c-surface);
  transition:var(--transition);
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--c-accent);box-shadow:0 0 0 3px var(--c-accent-light);
}
.form-group textarea{resize:vertical;min-height:80px}

/* Line Items */
.line-items{margin-top:16px}
.line-item{
  display:grid;gap:8px;padding:12px;background:var(--c-bg);
  border-radius:var(--r-sm);margin-bottom:8px;
  grid-template-columns:2fr 1fr 1fr 1fr auto;align-items:center;
}
@media(max-width:768px){
  .line-item{grid-template-columns:1fr;gap:8px}
}
.line-item input,.line-item select{
  padding:8px 10px;border-radius:var(--r-sm);
  border:1px solid var(--c-border);background:var(--c-surface);
  font-size:.85rem;
}
.btn-remove{
  width:32px;height:32px;border-radius:var(--r-sm);
  background:var(--c-danger);color:#fff;
  display:flex;align-items:center;justify-content:center;
  transition:var(--transition);
}
.btn-remove:hover{background:#b91c1c}
.btn-add{
  background:var(--c-accent-light);color:var(--c-accent);
  padding:10px 16px;border-radius:var(--r-sm);font-weight:600;
  font-size:.85rem;display:inline-flex;align-items:center;gap:6px;
  transition:var(--transition);
}
.btn-add:hover{background:var(--c-accent);color:#fff}

/* Invoice Preview */
.invoice-preview{
  background:var(--c-surface);border-radius:var(--r-xl);
  padding:40px;border:1px solid var(--c-border);
  box-shadow:var(--shadow-md);position:sticky;top:100px;
}
.invoice-preview-header{
  display:flex;justify-content:space-between;align-items:flex-start;
  margin-bottom:32px;padding-bottom:20px;border-bottom:2px solid var(--c-border);
}
.invoice-logo{max-width:120px;max-height:60px}
.invoice-title{font-size:2rem;font-weight:800;color:var(--c-accent)}
.invoice-details{display:grid;gap:24px;margin-bottom:28px}
.invoice-details-row{display:flex;justify-content:space-between;gap:20px}
@media(max-width:640px){.invoice-details-row{flex-direction:column}}
.invoice-party h4{font-size:.75rem;text-transform:uppercase;color:var(--c-muted);margin-bottom:6px;font-weight:700}
.invoice-party p{font-size:.9rem;color:var(--c-text);margin:2px 0}
.invoice-table{width:100%;border-collapse:collapse;margin-bottom:24px}
.invoice-table th{
  background:var(--c-bg);padding:10px 12px;
  text-align:right;font-size:.8rem;font-weight:700;
  color:var(--c-text);border-bottom:2px solid var(--c-border);
}
.invoice-table td{padding:10px 12px;border-bottom:1px solid var(--c-border);font-size:.9rem}
.invoice-table tfoot td{font-weight:700;font-size:.95rem;border-bottom:none;padding-top:12px}
.invoice-total{background:var(--c-accent-light);padding:12px;border-radius:var(--r-sm);font-size:1.1rem;font-weight:800}
.invoice-notes{margin-top:24px;padding-top:24px;border-top:1px solid var(--c-border);font-size:.85rem;color:var(--c-muted)}

/* ── Prose Content ── */
.prose{max-width:720px;margin-inline:auto}
.prose h2{margin-top:40px;margin-bottom:16px}
.prose h3{margin-top:28px;margin-bottom:12px}
.prose p{margin-bottom:16px;line-height:1.9}
.prose ul,.prose ol{margin-bottom:16px;margin-right:24px}
.prose li{margin-bottom:8px;padding-right:8px;position:relative}
.prose ul li::before{
  content:'•';position:absolute;right:-16px;
  color:var(--c-accent);font-weight:700;
}
.prose ol{counter-reset:item}
.prose ol li{counter-increment:item}
.prose ol li::before{
  content:counter(item) '.';position:absolute;right:-24px;
  color:var(--c-accent);font-weight:700;
}
.prose a{color:var(--c-accent);font-weight:600;text-decoration:underline}
.prose strong{color:var(--c-text);font-weight:700}

/* ── FAQ ── */
.faq-list{max-width:800px;margin-inline:auto}
.faq-item{
  background:var(--c-surface);border-radius:var(--r-md);
  padding:20px 24px;margin-bottom:12px;
  border:1px solid var(--c-border);cursor:pointer;
  transition:var(--transition);
}
.faq-item:hover{box-shadow:var(--shadow-sm)}
.faq-question{
  display:flex;justify-content:space-between;align-items:center;
  font-weight:700;font-size:1rem;color:var(--c-text);
}
.faq-toggle{
  width:24px;height:24px;border-radius:50%;
  background:var(--c-accent-light);color:var(--c-accent);
  display:flex;align-items:center;justify-content:center;
  transition:var(--transition);flex-shrink:0;margin-right:12px;
}
.faq-item.open .faq-toggle{transform:rotate(180deg);background:var(--c-accent);color:#fff}
.faq-answer{
  max-height:0;overflow:hidden;transition:max-height 300ms ease;
  padding-top:0;color:var(--c-muted);
}
.faq-item.open .faq-answer{max-height:500px;padding-top:12px}

/* ── Contact Grid ── */
.contact-grid{display:grid;gap:32px}
@media(min-width:1024px){.contact-grid{grid-template-columns:1fr 1.5fr}}
.contact-card{
  background:var(--c-surface);border-radius:var(--r-lg);
  padding:28px;border:1px solid var(--c-border);
}
.contact-info-item{display:flex;gap:16px;align-items:flex-start}
.contact-info-icon{
  width:40px;height:40px;border-radius:var(--r-sm);
  background:var(--c-accent-light);color:var(--c-accent);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.contact-info-icon svg{width:20px;height:20px}
.form-submit-row{margin-top:20px}

/* ── Footer ── */
.site-footer{
  background:var(--c-text);color:rgba(255,255,255,.8);
  padding-block:48px 24px;
}
.footer-grid{display:grid;gap:32px;margin-bottom:32px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}}
.footer-brand{font-family:var(--ff-display);font-weight:700;font-size:1.1rem;color:#fff;margin-bottom:12px}
.footer-desc{font-size:.875rem;line-height:1.7;margin-top:8px}
.footer-heading{color:#fff;font-weight:700;font-size:.9rem;margin-bottom:12px}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:.875rem;transition:var(--transition)}
.footer-links a:hover{color:#fff;padding-right:4px}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;
  padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  font-size:.82rem;flex-wrap:wrap;gap:12px;
}
.footer-legal{display:flex;gap:16px}
.footer-legal a:hover{color:#fff}

/* ── Utility Classes ── */
.mb-8{margin-bottom:8px}
.mb-12{margin-bottom:12px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.hidden{display:none}

/* ── Animations ── */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity 600ms,transform 600ms}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ── Toast Notifications ── */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(100px);
  background:var(--c-text);color:#fff;padding:14px 24px;
  border-radius:var(--r-md);font-size:.9rem;font-weight:600;
  box-shadow:var(--shadow-lg);opacity:0;transition:var(--transition);
  z-index:1000;max-width:90%;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.error{background:var(--c-danger)}
.toast.success{background:var(--c-green)}

/* ── Download Buttons ── */
.download-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.download-btn{
  flex:1;min-width:140px;display:flex;align-items:center;justify-content:center;
  gap:8px;padding:14px 24px;border-radius:var(--r-md);
  font-weight:600;font-size:.9rem;transition:var(--transition);
  cursor:pointer;
}
.download-btn svg{width:18px;height:18px}
.download-btn-pdf{background:var(--c-danger);color:#fff}
.download-btn-pdf:hover{background:#b91c1c;transform:translateY(-1px)}
.download-btn-docx{background:var(--c-accent);color:#fff}
.download-btn-docx:hover{background:var(--c-accent-dark);transform:translateY(-1px)}

/* ── Responsive Tweaks ── */
@media(max-width:640px){
  .section{padding-block:40px}
  .hero{padding-block:32px 48px}
  .builder-form,.invoice-preview{padding:24px}
  .invoice-preview{position:static;margin-top:32px}
  h1{font-size:2rem}
  h2{font-size:1.5rem}
  .btn-lg{font-size:.9rem;padding:12px 24px}
}

/* ── Print Styles ── */
@media print{
  .site-header,.site-footer,.builder-form,.download-actions,.nav,.hero,.section,.cta-banner{display:none}
  .invoice-preview{box-shadow:none;border:none;padding:0}
  body{background:#fff}
}