/* ========================================
   Adam Shadi Portfolio — Styles
   Palette: Amber/Gold (#f59e0b) accent
   Fonts: Inter + JetBrains Mono
   ======================================== */

/* --- Self-hosted Fonts (GDPR compliant — no third-party requests) --- */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('../assets/fonts/inter-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../assets/fonts/jetbrains-mono-500-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* --- CSS Custom Properties --- */
:root {
  /* Amber accent */
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --accent-glow: rgba(245, 158, 11, 0.15);
  --accent-glow-strong: rgba(245, 158, 11, 0.3);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --section-pad: clamp(4rem, 10vw, 8rem);
  --inner-max: 1100px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark theme (default) */
[data-theme="dark"] {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #161616;
  --bg-card-hover: #1a1a1a;
  --border: #222222;
  --border-hover: #333333;
  --text-primary: #f5f5f5;
  --text-secondary: #a3a3a3;
  --text-muted: #666666;
  --nav-bg: rgba(10, 10, 10, 0.85);
}

/* Light theme */
[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #f5f5f5;
  --bg-card: #ffffff;
  --bg-card-hover: #fefefe;
  --border: #e5e5e5;
  --border-hover: #d4d4d4;
  --text-primary: #171717;
  --text-secondary: #525252;
  --text-muted: #a3a3a3;
  --nav-bg: rgba(250, 250, 250, 0.85);
  --accent-glow: rgba(245, 158, 11, 0.08);
  --accent-glow-strong: rgba(245, 158, 11, 0.15);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition-base), color var(--transition-base);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #000;
  padding: 0.75rem 1.5rem;
  border-radius: 0 0 8px 8px;
  font-weight: 600;
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  color: #000;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.nav__inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}

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

.nav__links {
  display: flex;
  gap: 2rem;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link:hover {
  color: var(--text-primary);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__link.active {
  color: var(--text-primary);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

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

[data-theme="dark"] .theme-toggle__icon--moon { display: none; }
[data-theme="light"] .theme-toggle__icon--sun { display: none; }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 0 1.5rem;
}

.hero__greeting {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero__headline {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.4s forwards;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.7;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.6s forwards;
}

.hero__ctas {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.8s forwards;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0;
  animation: fadeIn 1s ease 1.2s forwards;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  border: 1px solid transparent;
}

.btn--primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

.btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #000;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow-strong);
}

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

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

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

.btn--outline:hover {
  background: var(--accent-glow);
  transform: translateY(-1px);
  color: var(--accent);
}

/* --- Sections --- */
.section {
  padding: var(--section-pad) 1.5rem;
}

.section__inner {
  max-width: var(--inner-max);
  margin: 0 auto;
}

.section__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}

.section__heading {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 2.5rem;
}

/* --- Stats Bar --- */
.stats {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 3rem 1.5rem;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.stats__inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stats__number {
  display: block;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.stats__label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- About --- */
.about__content {
  max-width: 720px;
}

.about__content p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
  line-height: 1.75;
}

.about__content p:last-child {
  margin-bottom: 0;
}

/* --- Projects --- */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--accent-glow);
  background: var(--bg-card-hover);
}

.project-card__header {
  margin-bottom: 1.25rem;
}

.project-card__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.project-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.project-card__tagline {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.project-card__body {
  flex: 1;
}

.project-card__description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.project-card__footer {
  margin-top: auto;
}

/* --- Skills --- */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  transition: border-color var(--transition-base), background var(--transition-base);
}

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

.skill-category__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.skill-category__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.skill-category__list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 1rem;
  position: relative;
}

.skill-category__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
}

/* --- Experience --- */
.experience__timeline {
  position: relative;
  padding-left: 2rem;
}

.experience__timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--border), transparent);
}

.experience__entry {
  position: relative;
  padding-bottom: 2.5rem;
  padding-left: 1.5rem;
}

.experience__entry:last-child {
  padding-bottom: 0;
}

.experience__entry::before {
  content: '';
  position: absolute;
  left: -2.35rem;
  top: 0.4rem;
  width: 10px;
  height: 10px;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  border-radius: 50%;
  transition: background var(--transition-base);
}

.experience__entry--highlight {
  background: var(--accent-glow);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 12px;
  padding: 1.75rem 1.75rem 1.75rem 1.5rem;
  margin-left: 0;
  margin-bottom: 0.5rem;
}

.experience__entry--highlight::before {
  background: var(--accent);
}

.experience__date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.experience__role {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.experience__company {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.experience__summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Contact --- */
.contact {
  text-align: center;
}

.contact__text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.contact__links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: border-color var(--transition-base);
}

.footer__inner {
  max-width: var(--inner-max);
  margin: 0 auto;
}

.footer__text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.footer__copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Scroll Animations --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Keyframes --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__link {
    padding: 0.75rem 0;
    font-size: 1rem;
  }

  .nav__hamburger {
    display: flex;
  }

  .stats__inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .experience__timeline {
    padding-left: 1.5rem;
  }

  .experience__entry {
    padding-left: 1rem;
  }

  .experience__entry::before {
    left: -1.85rem;
  }
}

@media (max-width: 480px) {
  .skills__grid {
    grid-template-columns: 1fr;
  }

  .hero__ctas {
    flex-direction: column;
    align-items: center;
  }

  .contact__links {
    flex-direction: column;
    align-items: center;
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }

  .hero__greeting,
  .hero__headline,
  .hero__subtitle,
  .hero__ctas,
  .hero__scroll-hint {
    opacity: 1;
  }
}

/* --- Focus Styles --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

/* --- Selection --- */
::selection {
  background: var(--accent);
  color: #000;
}