/* ==========================================================================
   THEME TOKENS
   Centralizing colors, spacing, and type here means every component below
   pulls from one source of truth — change the palette or scale in one place.
   ========================================================================== */
:root {
  /* Core theme colors (brief-specified) */
  --color-orange: #FF7A00;
  --color-orange-dim: #cc6200;
  --color-gunmetal: #2A2F32;

  /* Derived surface/background scale (dark, tech-forward base) */
  --color-bg: #17191b;
  --color-surface: #2A2F32;
  --color-surface-alt: #202325;
  --color-border: rgba(255, 255, 255, 0.08);

  /* Text */
  --color-text: #F2F1EE;
  --color-text-muted: #9BA3A8;
  --color-text-faint: #6b7378;

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Layout */
  --container-width: 1140px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s var(--ease);
  --transition-med: 0.4s var(--ease);
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
}

p { margin: 0 0 var(--space-sm); color: var(--color-text-muted); }

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

ul { list-style: none; margin: 0; padding: 0; }

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.accent { color: var(--color-orange); }

/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   SHARED SECTION / TYPOGRAPHY PATTERNS
   ========================================================================== */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-orange);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-xs);
}

.eyebrow::before { content: '// '; color: var(--color-text-faint); }

.section {
  padding: var(--space-2xl) 0;
}

.section-alt {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  max-width: 560px;
  margin-bottom: var(--space-lg);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-orange);
  color: #1a1a1a;
}

.btn-primary:hover {
  background: #ff8c1f;
  box-shadow: 0 8px 24px rgba(255, 122, 0, 0.25);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
  transform: translateY(-2px);
}

.btn-small { padding: 0.55rem 1.15rem; font-size: 0.85rem; }
.btn-full { width: 100%; }

/* Ripple effect element injected by JS on click */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  transform: scale(0);
  animation: ripple 0.6s var(--ease);
  pointer-events: none;
}

@keyframes ripple {
  to { transform: scale(3.5); opacity: 0; }
}

/* ==========================================================================
   HEADER / NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(23, 25, 27, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}

.logo-mark {
  font-family: var(--font-mono);
  color: var(--color-orange);
}

/* --- Nav layout --- */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: color var(--transition-fast);
}

.nav-link:hover { color: var(--color-orange); }

.nav-cta { flex-shrink: 0; }

/* --- Dropdown menus --- */
.nav-item { position: relative; }

.chevron {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
  margin-top: -2px;
}

.nav-item.open .chevron { transform: rotate(-135deg); }

.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-med), transform var(--transition-med), visibility var(--transition-med);
}

.nav-item.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-menu li a {
  display: block;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-menu li a:hover {
  background: rgba(255, 122, 0, 0.1);
  color: var(--color-orange);
}

/* --- Mobile toggle (hidden on desktop) --- */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.mobile-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative;
  padding: calc(var(--space-2xl) + 2rem) 0 var(--space-2xl);
  overflow: hidden;
}

/* Faint dot-grid texture behind the hero — the page's quiet signature motif */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 122, 0, 0.18) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 20%, black 20%, transparent 75%);
  pointer-events: none;
}

.hero-inner { position: relative; text-align: center; }

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  max-width: 800px;
  margin: 0 auto var(--space-md);
}

.hero-subtitle {
  max-width: 560px;
  margin: 0 auto var(--space-lg);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

/* Focus chips: a lighter substitute for numeric "stats" that better fits
   an early-career/portfolio-building narrative than fabricated metrics */
.hero-focus {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-text p { font-size: 1.02rem; }

.text-link {
  color: var(--color-orange);
  font-weight: 600;
  display: inline-block;
  margin-top: var(--space-xs);
  transition: transform var(--transition-fast);
}

.text-link:hover { transform: translateX(4px); }

.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.about-card-title {
  font-size: 1.05rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.about-list li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--color-border);
}

.about-list li:last-child { border-bottom: none; }

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-orange);
  flex-shrink: 0;
}

/* ==========================================================================
   PROJECTS
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-med), border-color var(--transition-med), box-shadow var(--transition-med);
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 122, 0, 0.35);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Image placeholder: gradient block with a large mono numeral watermark */
.project-image {
  height: 180px;
  background: linear-gradient(135deg, var(--color-gunmetal), #1c1f21);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  border-bottom: 1px solid var(--color-border);
}

.project-image::after {
  content: attr(data-label);
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 500;
  color: rgba(255, 122, 0, 0.15);
  padding: 0 1.25rem;
}

.project-body { padding: var(--space-md); }

.project-title { font-size: 1.15rem; margin-bottom: 0.5rem; }

.project-desc { font-size: 0.92rem; margin-bottom: var(--space-sm); }

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: rgba(255, 122, 0, 0.08);
  color: var(--color-orange);
  border: 1px solid rgba(255, 122, 0, 0.2);
}

.tag-lg {
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
}

/* ==========================================================================
   SKILLS
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.skill-group-title {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-weight: 400;
  margin-bottom: var(--space-sm);
}

.skill-group .tag-row { margin-bottom: 0; }

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-value { font-size: 1rem; color: var(--color-text); }

.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: var(--space-sm);
}

.form-row label {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
}

.form-row input,
.form-row textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  resize: vertical;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.15);
}

.form-status {
  margin: var(--space-sm) 0 0;
  font-size: 0.9rem;
  color: var(--color-orange);
  min-height: 1.2em;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: var(--space-md);
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover { color: var(--color-orange); }

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-text-faint);
  margin: 0;
}

/* ==========================================================================
   SCROLL-TRIGGERED FADE-IN
   Elements start slightly translated + transparent; JS adds .visible
   via IntersectionObserver once they enter the viewport.
   ========================================================================== */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

/* --- Tablet: <=1024px --- */
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

/* --- Mobile: <=768px --- */
@media (max-width: 768px) {
  .mobile-toggle { display: flex; }

  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-md);
    gap: var(--space-md);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height var(--transition-med), opacity var(--transition-med);
  }

  .main-nav.open {
    max-height: 500px;
    opacity: 1;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--color-border);
    justify-content: space-between;
  }

  .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    max-height: 0;
    overflow: hidden;
    padding: 0;
    border: none;
    box-shadow: none;
    background: transparent;
    transition: max-height var(--transition-med), padding var(--transition-med);
  }

  .nav-item.open .dropdown-menu {
    max-height: 300px;
    padding: 0.5rem 0 0.5rem 0.75rem;
  }

  .nav-cta { margin-top: var(--space-sm); }

  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
}