:root {
  --bg: #0b0d12;
  --bg-alt: #10131a;
  --surface: #151922;
  --border: #232836;
  --text: #e8eaf0;
  --text-dim: #9aa1b2;
  --accent: #6ee7b7;
  --accent-dim: #2f6b52;
  --accent-2: #7aa2f7;
  --radius: 14px;
  --font-en: "Rubik", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-fa: "Vazirmatn", -apple-system, "Segoe UI", Tahoma, sans-serif;
}

:root[data-theme="light"] {
  --bg: #f7f8fb;
  --bg-alt: #eef0f5;
  --surface: #ffffff;
  --border: #e2e5ee;
  --text: #1b1e27;
  --text-dim: #5a6072;
  --accent: #0f9d6e;
  --accent-dim: #cdeee0;
  --accent-2: #3457c9;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-en);
  line-height: 1.6;
  transition: background .25s ease, color .25s ease;
  overflow-x: hidden;
}

html[dir="rtl"] body { font-family: var(--font-fa); }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.bg-glow {
  position: fixed;
  inset: -20% -20% auto -20%;
  height: 60vh;
  background: radial-gradient(60% 60% at 50% 0%, var(--accent-dim), transparent 70%);
  opacity: .35;
  pointer-events: none;
  z-index: 0;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: .02em;
}

.mainnav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.mainnav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: .92rem;
  transition: color .15s ease;
}

.mainnav a:hover { color: var(--accent); }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn, .lang-btn {
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: .9rem;
  font-weight: 600;
  transition: border-color .15s ease, transform .15s ease;
}

.icon-btn { padding: 8px 10px; font-size: 1rem; }

.icon-btn:hover, .lang-btn:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.theme-icon { display: flex; }
.theme-icon svg { width: 18px; height: 18px; }

.contact-icon { display: flex; flex-shrink: 0; }
.contact-icon svg { width: 18px; height: 18px; color: var(--accent); }

/* Sections */
.section {
  position: relative;
  z-index: 1;
  padding: 88px 0;
  border-bottom: 1px solid var(--border);
}

.section.alt { background: var(--bg-alt); }

.section-title {
  font-size: 1.8rem;
  margin: 0 0 32px;
  font-weight: 700;
  letter-spacing: -.01em;
}

/* Hero */
.hero { padding-top: 120px; padding-bottom: 120px; text-align: start; }

.hero-inner { max-width: 720px; }

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  font-size: .8rem;
  margin: 0 0 12px;
}

.hero-name {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  margin: 0 0 8px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.hero-role {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  color: var(--text-dim);
  font-weight: 500;
  margin: 0 0 20px;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 0 32px;
}

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: .95rem;
  transition: transform .15s ease, opacity .15s ease;
  border: 1px solid transparent;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #06120c;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

/* About */
.about-text {
  max-width: 720px;
  color: var(--text-dim);
  font-size: 1.02rem;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.skill-card h3 {
  margin: 0 0 14px;
  font-size: 1rem;
  color: var(--accent-2);
}

.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list li {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: .82rem;
  color: var(--text-dim);
}

:root[data-theme="light"] .skill-card .tag-list li { background: var(--bg); }

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform .15s ease, border-color .15s ease;
}

.project-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

.project-card h3 { margin: 0; font-size: 1.1rem; }

.project-card p { margin: 0; color: var(--text-dim); font-size: .95rem; flex-grow: 1; }

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.project-tags span {
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 6px;
  padding: 3px 9px;
  font-size: .75rem;
  font-weight: 600;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.project-link {
  color: var(--accent-2);
  text-decoration: none;
  font-weight: 600;
  font-size: .88rem;
}

.project-link:hover { text-decoration: underline; }

.project-link--live {
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 10px;
  border-radius: 999px;
}

.project-link--live:hover { text-decoration: none; opacity: .85; }

/* Timeline / Experience */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.timeline-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-inline-start: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px 22px;
}

html[dir="rtl"] .timeline-item { border-inline-start: 3px solid var(--accent); }

.timeline-item .role { font-weight: 700; font-size: 1.02rem; }

.timeline-item .company { color: var(--accent-2); font-size: .92rem; margin-bottom: 4px; }

.timeline-item .dates { color: var(--text-dim); font-size: .82rem; margin-bottom: 10px; }

.timeline-item .desc { color: var(--text-dim); font-size: .92rem; margin: 0; }

/* Contact */
.contact-intro { color: var(--text-dim); max-width: 600px; margin: 0 0 26px; }

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.contact-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  color: var(--text);
  text-decoration: none;
  font-size: .95rem;
  transition: border-color .15s ease;
}

.contact-list a:hover { border-color: var(--accent); }

/* Footer */
.footer { padding: 28px 0; }

.footer-inner {
  color: var(--text-dim);
  font-size: .85rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; }
  .mainnav { order: 3; width: 100%; gap: 14px; overflow-x: auto; padding-top: 4px; }
  .section { padding: 60px 0; }
  .hero { padding-top: 70px; padding-bottom: 70px; }
}