/* ==========================================================================
   Mahdi Niknam — Portfolio
   Design system: Terminal dark (OLED) + success-green accent
   Fonts: self-hosted Vazirmatn (FA/EN body) + JetBrains Mono (display/code)
   ========================================================================== */

/* ---- Self-hosted fonts (Google Fonts is unreliable from Iran) ----------- */

@font-face {
  font-family: "Vazirmatn";
  src: url("/fonts/Vazirmatn-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("/fonts/Vazirmatn-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("/fonts/Vazirmatn-Bold.woff2") format("woff2");
  font-weight: 600 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/JetBrainsMono-Bold.woff2") format("woff2");
  font-weight: 600 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #020617;
  --bg-card: #0e1223;
  --bg-muted: #1a1e2f;
  --border: #334155;
  --fg: #f8fafc;
  --fg-muted: #94a3b8;
  --accent: #22c55e;
  --accent-soft: rgba(34, 197, 94, 0.12);
  --on-accent: #052e16;
  --danger: #ef4444;
  --ring: #22c55e;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --font-fa: "Vazirmatn", "Tahoma", sans-serif;
  --font-en: "Vazirmatn", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;
  --radius: 14px;
  --radius-sm: 8px;
  --transition: 180ms ease;
  --maxw: 1080px;
}

[data-theme="light"] {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-muted: #eef2f7;
  --border: #dbe2ea;
  --fg: #0f172a;
  --fg-muted: #475569;
  --accent: #16a34a;
  --accent-soft: rgba(22, 163, 74, 0.1);
  --on-accent: #ffffff;
  --danger: #dc2626;
  --ring: #16a34a;
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-fa);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

html[lang="en"] body {
  font-family: var(--font-en);
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

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

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Navbar ------------------------------------------------------------- */

.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 28px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--accent);
  white-space: nowrap;
}

.logo::before {
  content: "~/";
  color: var(--fg-muted);
}

.nav-links {
  display: flex;
  gap: 22px;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--fg-muted);
  transition: color var(--transition);
}

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

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

.theme-toggle,
.lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  min-width: 36px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: border-color var(--transition), color var(--transition);
}

.theme-toggle:hover,
.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- Hero ---------------------------------------------------------------- */

.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 72px 24px 40px;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}

.avatar-ring {
  width: 220px;
  height: 220px;
  margin: 0 auto;
  border-radius: 50%;
  padding: 4px;
  background: conic-gradient(from 120deg, var(--accent), transparent 45%, var(--accent));
}

.avatar-ring img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg);
  display: block;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2.4s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.hero h1 {
  margin-top: 18px;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.25;
}

html[lang="en"] .hero h1 {
  font-family: var(--font-mono);
}

.role {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
}

.role::before {
  content: "$ ";
  color: var(--fg-muted);
}

/* Terminal-style bio block */
.terminal {
  margin-top: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-muted);
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-r { background: #ef4444; }
.dot-y { background: #eab308; }
.dot-g { background: #22c55e; }

.terminal-title {
  margin-inline-start: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
}

.terminal-body {
  padding: 18px;
  font-size: 0.92rem;
  color: var(--fg-muted);
  max-height: 220px;
  overflow-y: auto;
}

.cursor {
  display: inline-block;
  width: 9px;
  height: 1.05em;
  margin-top: 8px;
  background: var(--accent);
  animation: blink 1.1s steps(1) infinite;
  vertical-align: text-bottom;
}

@keyframes blink {
  50% { opacity: 0; }
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition), border-color var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-soft);
}

.btn-outline {
  border-color: var(--border);
  color: var(--fg);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-social {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}

.hero-social a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--fg-muted);
  transition: color var(--transition);
}

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

/* ---- Ticker strip ---------------------------------------------------------- */

.ticker-strip {
  overflow: hidden;
  border-block: 1px solid var(--border);
  background: var(--bg-card);
  padding: 10px 0;
  white-space: nowrap;
}

.ticker-track {
  display: inline-flex;
  align-items: center;
  gap: 26px;
  padding-inline-end: 26px;
  animation: ticker 28s linear infinite;
}

.ticker-item {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--fg-muted);
}

.ticker-dot {
  color: var(--accent);
  font-size: 0.6rem;
}

@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

html[dir="rtl"] .ticker-track {
  animation-direction: reverse;
}

/* ---- Sections ---------------------------------------------------------------- */

.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 64px 24px;
}

.section-heading {
  margin-bottom: 36px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 6px;
}

.section-heading h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
}

/* ---- Skills -------------------------------------------------------------------- */

.skill-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.skill-category {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 22px;
  transition: border-color var(--transition), transform var(--transition);
}

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

.skill-category-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.skill-category-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  flex: none;
}

.skill-category-icon svg {
  width: 20px;
  height: 20px;
}

.skill-category h3 {
  font-size: 1rem;
  font-weight: 700;
  flex: 1;
}

.skill-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 9px;
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-chip {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-muted);
  color: var(--fg);
  transition: border-color var(--transition), color var(--transition);
}

.skill-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- Services ------------------------------------------------------------------ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.service-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 26px;
  transition: border-color var(--transition), transform var(--transition);
}

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

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 14px;
}

.service-icon svg {
  width: 22px;
  height: 22px;
}

.service-card h3 {
  font-size: 1.02rem;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--fg-muted);
}

/* ---- Companies marquee ------------------------------------------------------------ */

.marquee {
  overflow: hidden;
  position: relative;
  padding: 6px 0;
}

.marquee-track {
  display: inline-flex;
  align-items: center;
  gap: 48px;
  padding-inline-end: 48px;
  animation: ticker 32s linear infinite;
}

html[dir="rtl"] .marquee-track {
  animation-direction: reverse;
}

.company-item {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  opacity: 0.75;
  transition: opacity var(--transition);
}

.company-item:hover {
  opacity: 1;
}

.company-item img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.company-fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
}

.company-name {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--fg-muted);
  white-space: nowrap;
}

/* ---- Projects ---------------------------------------------------------------------- */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.project-image {
  height: 180px;
  background-color: var(--bg-muted);
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--border);
}

.project-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  flex: 1;
}

.project-content h3 {
  font-size: 1.05rem;
}

.project-content p {
  font-size: 0.88rem;
  color: var(--fg-muted);
  flex: 1;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin-top: 6px;
}

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

/* ---- Contact ------------------------------------------------------------------------ */

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
}

.pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ---- Footer ---------------------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--border);
  padding: 26px 24px;
  text-align: center;
}

.footer-credit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
}

/* ---- Scroll reveal ------------------------------------------------------------------------ */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 500ms ease var(--reveal-delay, 0ms),
    transform 500ms ease var(--reveal-delay, 0ms);
}

.reveal.revealed {
  opacity: 1;
  transform: none;
}

/* ---- Responsive ------------------------------------------------------------------------------- */

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 48px;
  }

  .avatar-ring {
    width: 170px;
    height: 170px;
  }

  .actions,
  .hero-social {
    justify-content: center;
  }

  .nav-links {
    display: none;
  }

  .terminal-body {
    max-height: none;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: 12px 16px;
  }

  .section {
    padding: 48px 16px;
  }

  .hero {
    padding: 40px 16px 32px;
  }
}