/* Page structure: header, sections, grids, footer. Uses logical properties so LTR and RTL both work */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 16px; }
@media (min-width: 640px) { .container { padding-inline: 24px; } }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50; height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.site-header.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 1rem; }

.brand { display: flex; align-items: center; gap: 0.6rem; color: var(--text); font-weight: 700; }
.brand:hover { color: var(--text); }
.brand-mark {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--coral)); color: #fff;
  font-family: var(--font-mono); font-size: 0.85rem; transform: rotate(-6deg);
  transition: transform 0.4s var(--bounce);
}
.brand:hover .brand-mark { transform: rotate(6deg) scale(1.06); }

.main-nav { display: flex; align-items: center; gap: 0.25rem; }
.main-nav a { color: var(--text-muted); padding: 0.4rem 0.85rem; border-radius: 999px; font-weight: 500; transition: color 0.2s, background 0.2s; }
.main-nav a:hover, .main-nav a.active { color: var(--text); background: var(--primary-soft); }
.main-nav a.nav-cta { color: #fff; background: var(--primary); margin-inline-start: 0.5rem; }
.main-nav a.nav-cta:hover { background: var(--primary-strong); }

.header-actions { display: flex; gap: 0.5rem; }

@media (max-width: 860px) {
  .main-nav {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch;
    padding: 1rem 16px 1.5rem; background: var(--surface); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg);
    transform: translateY(-120%); visibility: hidden; transition: transform 0.35s var(--ease), visibility 0.35s;
  }
  .main-nav.open { transform: none; visibility: visible; }
  .main-nav a { padding: 0.8rem 1rem; border-radius: var(--radius-sm); }
  .main-nav a.nav-cta { margin: 0.5rem 0 0; text-align: center; }
}

/* Hero */
.hero { position: relative; overflow: hidden; padding: clamp(2.5rem, 7vw, 5rem) 0 3.5rem; isolation: isolate; }
.blobs { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(60px); }
.blob-1 { width: 420px; height: 420px; background: var(--blob-1); top: -120px; inset-inline-start: -80px; animation: drift 18s ease-in-out infinite; }
.blob-2 { width: 360px; height: 360px; background: var(--blob-2); top: 40px; inset-inline-end: -60px; animation: drift 22s ease-in-out infinite reverse; }
.blob-3 { width: 300px; height: 300px; background: var(--blob-3); bottom: -80px; inset-inline-start: 35%; animation: drift 20s ease-in-out infinite; }

.hero-inner { display: grid; grid-template-columns: 1.2fr 0.8fr; align-items: center; gap: clamp(2rem, 5vw, 4rem); }
.hero-hi { font-size: clamp(1.1rem, 2vw, 1.35rem); font-weight: 500; color: var(--text-muted); margin: 1rem 0 0.25rem; }
.hero-role { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; font-size: clamp(1.1rem, 2.2vw, 1.4rem); font-weight: 600; margin-bottom: 0.6rem; }
.hero-role .sep { color: var(--coral); }
.hero-typed { font-family: var(--font-mono); color: var(--primary); direction: ltr; text-align: left; min-height: 1.7em; font-size: 0.98rem; }
[dir="rtl"] .hero-typed { text-align: right; }
.hero-typed .prompt { color: var(--coral); }
.hero-lead { font-size: 1.15rem; color: var(--text-muted); max-width: 58ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.75rem; }

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-photo { order: -1; max-width: 300px; margin-inline: auto; }
}

/* Sections */
.section { padding: clamp(4rem, 9vw, 6.5rem) 0; }
.section-alt { background: var(--bg-alt); }
.section-head { margin-bottom: 2.5rem; max-width: 680px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 1.25rem; }
.stack-groups { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1.25rem; }
.edu-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem; }

/* Contact */
.contact-inner { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
@media (max-width: 860px) { .contact-inner { grid-template-columns: 1fr; } }

/* Footer (always English, LTR) */
.site-footer { border-top: 1px solid var(--border); padding: 1.75rem 0; font-size: 0.95rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem; }
.footer-inner p { margin: 0; }