/* =============================================================================
   style.css — Payton Butler Portfolio
   =============================================================================

   Table of Contents
   -----------------
   1.  Design Tokens (colors, type, spacing)
   2.  Reset & Base
   3.  Typography
   4.  Layout Utilities
   5.  Header & Navigation
   6.  Hero Section
   7.  About Section
   8.  Projects Section & Cards
   9.  Contact Section
   10. Footer
   11. Scroll Reveal Animation
   12. Responsive (mobile)
   ============================================================================= */

/* ─── 1. Design Tokens ───────────────────────────────────────────────────── */
:root {
  /* Colors */
  --color-bg: #0D1117;
  --color-bg-surface: #161B22;
  --color-bg-elevated: #1C2433;
  --color-border: #2A3347;
  --color-text: #E6EDF3;
  --color-text-muted: #8B96A8;
  --color-accent: #FF6B47;
  --color-accent-dim: rgba(255, 107, 71, 0.12);
  --color-accent-hover: #FF8568;

  /* Typography */
  --font-display: 'DM Sans', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Type Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.25rem;
  --text-4xl: 3rem;
  --text-5xl: 4rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Layout */
  --max-width: 1100px;
  --header-height: 68px;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ─── 2. Reset & Base ────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img,
svg {
  display: block;
}

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

ul,
ol {
  list-style: none;
}

/* ─── 3. Typography ──────────────────────────────────────────────────────── */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 540px;
  line-height: 1.7;
}

/* ─── 4. Layout Utilities ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section+.section {
  border-top: 1px solid var(--color-border);
}

/* ─── 5. Header & Navigation ─────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background-color: transparent;
  transition: background-color var(--transition-base),
    border-color var(--transition-base),
    backdrop-filter var(--transition-base);
  border-bottom: 1px solid transparent;
}

.site-header--scrolled {
  background-color: rgba(13, 17, 23, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.04em;
}

.logo span {
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover,
.nav-link--active {
  color: var(--color-text);
}

.nav-link--active::after {
  transform: scaleX(1);
}

.nav-cta {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast),
    color var(--transition-fast);
}

.nav-cta:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ─── 6. Hero Section ────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.25;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

/* Side-by-side layout: text left, photo right */
.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-16);
  align-items: center;
  width: 100%;
}

.hero-content {
  max-width: 600px;
}

/* Photo */
.hero-photo-wrapper {
  flex-shrink: 0;
}

.hero-photo {
  width: 280px;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
  box-shadow: 0 0 0 6px var(--color-bg-surface),
    0 24px 48px rgba(0, 0, 0, 0.5);
  filter: grayscale(15%);
  transition: filter var(--transition-base);
}

.hero-photo:hover {
  filter: grayscale(0%);
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hero-eyebrow::before {
  content: '>';
  display: inline-block;
  color: var(--color-accent);
  margin-right: 4px;
}

.hero-name {
  font-size: clamp(var(--text-4xl), 6vw, var(--text-5xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.hero-subtitle-wrapper {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  height: 1.4em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

#typed-subtitle::after {
  content: '|';
  color: var(--color-accent);
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

.hero-bio {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 520px;
  line-height: 1.75;
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
  letter-spacing: 0.01em;
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

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

.btn--secondary:hover {
  border-color: var(--color-text-muted);
  background-color: var(--color-bg-surface);
}

/* ─── 7. About Section ───────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.about-text p {
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

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

.about-text strong {
  color: var(--color-text);
  font-weight: 600;
}

.skills-block {
  margin-top: var(--space-8);
}

.skills-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.skill-chip {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.highlight-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.highlight-card-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.highlight-card-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.highlight-card-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ─── 8. Projects Section & Cards ────────────────────────────────────────── */
.projects-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-12);
  gap: var(--space-6);
}

.projects-header-text {
  flex: 1;
}

#projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.project-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-bg-elevated);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card--highlight {
  border-color: rgba(255, 107, 71, 0.25);
}

.project-card--highlight::before {
  transform: scaleX(1);
}

.card-inner {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.card-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: var(--space-6);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.02em;
}

.card-links {
  display: flex;
  gap: var(--space-2);
  flex-shrink: 0;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.card-link svg {
  width: 12px;
  height: 12px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card-link:first-child svg {
  fill: currentColor;
  stroke: none;
}

.card-link:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
  background-color: var(--color-bg-elevated);
}

.card-link--accent {
  color: var(--color-accent);
  border-color: rgba(255, 107, 71, 0.4);
}

.card-link--accent:hover {
  background-color: var(--color-accent-dim);
  color: var(--color-accent-hover);
  border-color: var(--color-accent);
}

.empty-state {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  grid-column: 1 / -1;
}

.empty-state code {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 0.85em;
}

/* ─── 9. Contact Section ─────────────────────────────────────────────────── */
.contact-inner {
  max-width: 580px;
}

.contact-inner .section-subtitle {
  margin-bottom: var(--space-8);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.contact-link-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.contact-link-row:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent-dim);
  transform: translateX(4px);
}

.contact-link-icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-link-label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  min-width: 80px;
}

.contact-link-value {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

/* ─── 10. Footer ─────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.footer-note span {
  color: var(--color-accent);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-link {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-text);
}

/* ─── 11. Scroll Reveal Animation ────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger.revealed>*:nth-child(1) {
  transition-delay: 0ms;
  opacity: 1;
  transform: none;
}

.reveal-stagger.revealed>*:nth-child(2) {
  transition-delay: 80ms;
  opacity: 1;
  transform: none;
}

.reveal-stagger.revealed>*:nth-child(3) {
  transition-delay: 160ms;
  opacity: 1;
  transform: none;
}

.reveal-stagger.revealed>*:nth-child(4) {
  transition-delay: 240ms;
  opacity: 1;
  transform: none;
}

.reveal-stagger.revealed>*:nth-child(5) {
  transition-delay: 320ms;
  opacity: 1;
  transform: none;
}

.reveal-stagger.revealed>*:nth-child(6) {
  transition-delay: 400ms;
  opacity: 1;
  transform: none;
}

.reveal-stagger.revealed>*:nth-child(n+7) {
  transition-delay: 480ms;
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {

  .reveal,
  .reveal-stagger>* {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ─── 12. Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-layout {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .hero-photo-wrapper {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --text-5xl: 3rem;
    --text-4xl: 2.25rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-8);
    border-top: 1px solid var(--color-border);
  }

  .nav-menu.nav-menu--open {
    display: flex;
  }

  .nav-menu .nav-link {
    font-size: var(--text-xl);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .projects-header {
    flex-direction: column;
    align-items: flex-start;
  }

  #projects-grid {
    grid-template-columns: 1fr;
  }

  .contact-link-row {
    flex-wrap: wrap;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}