/* ============================================================
   DESIGN TOKENS — Joshua Stadler Portfolio
   Palette: Near-black canvas + neon orange
   Tone: Sharp, direct, infrastructure-grade
   ============================================================ */

:root,
[data-theme='dark'] {
  /* Surfaces */
  --color-bg: #0a0a0b;
  --color-surface: #101012;
  --color-surface-2: #16161a;
  --color-surface-offset: #101012;
  --color-surface-offset-2: #1c1c22;
  --color-surface-dynamic: #222228;
  --color-divider: #1e1e24;
  --color-border: #2a2a32;

  /* Text */
  --color-text: #f2f2f4;
  --color-text-muted: #9a9aa6;
  --color-text-faint: #5c5c68;
  --color-text-inverse: #0a0a0b;

  /* Primary — neon orange */
  --color-primary: #FF5A1F;
  --color-primary-hover: #FF6A2B;
  --color-primary-active: #C23C0C;
  --color-primary-highlight: rgba(255,90,31,0.12);

  /* Secondary */
  --color-secondary: #FF7E45;
  --color-secondary-hover: #FF6A2B;
  --color-secondary-active: #FF5A1F;

  /* Accent — muted orange-warm */
  --color-accent: #FF7E45;
  --color-accent-hover: #FF6A2B;
  --color-accent-highlight: rgba(255,126,69,0.12);

  /* Status */
  --color-success: #34d399;
  --color-success-highlight: rgba(52,211,153,0.12);
  --color-error: #f87171;

  /* Radius — sharp corners throughout */
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 2px;
  --radius-xl: 2px;
  --radius-2xl: 2px;
  --radius-full: 2px;

  /* Shadows — hard offset (brand kit style) */
  --shadow-sm: 2px 2px 0px rgba(255,90,31,0.25);
  --shadow-md: 4px 4px 0px rgba(255,90,31,0.2);
  --shadow-lg: 6px 6px 0px rgba(255,90,31,0.18);
  --shadow-xl: 8px 8px 0px rgba(255,90,31,0.15);

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 7.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'Clash Display', 'Arial Narrow', sans-serif;
  --font-body: 'Satoshi', 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'Geist Mono', 'JetBrains Mono', monospace;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme='light'] {
  --color-bg: #f6f6f4;
  --color-surface: #fbfbf9;
  --color-surface-2: #ffffff;
  --color-surface-offset: #f0f0ec;
  --color-surface-offset-2: #e8e8e4;
  --color-surface-dynamic: #dededa;
  --color-divider: #d4d4cf;
  --color-border: #c8c8c2;

  --color-text: #0a0a0b;
  --color-text-muted: #5c5c68;
  --color-text-faint: #9a9aa6;
  --color-text-inverse: #f2f2f4;

  --color-primary: #C23C0C;
  --color-primary-hover: #FF5A1F;
  --color-primary-active: #a03009;
  --color-primary-highlight: rgba(194,60,12,0.1);

  --color-secondary: #FF5A1F;
  --color-secondary-hover: #C23C0C;
  --color-secondary-active: #a03009;

  --color-accent: #C23C0C;
  --color-accent-hover: #FF5A1F;
  --color-accent-highlight: rgba(194,60,12,0.1);

  --color-success: #16803c;
  --color-success-highlight: #d1fae5;
  --color-error: #b91c1c;

  --shadow-sm: 2px 2px 0px rgba(194,60,12,0.2);
  --shadow-md: 4px 4px 0px rgba(194,60,12,0.15);
  --shadow-lg: 6px 6px 0px rgba(194,60,12,0.12);
  --shadow-xl: 8px 8px 0px rgba(194,60,12,0.1);
}

/* ============================================================
   BASE STYLES
   ============================================================ */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color 0.3s var(--ease-in-out), color 0.3s var(--ease-in-out);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul[role='list'], ol[role='list'] {
  list-style: none;
}

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

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.15;
  font-family: var(--font-display);
}

p, li, figcaption {
  text-wrap: pretty;
}

::selection {
  background: rgba(255,90,31,0.25);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

/* ---- LAYOUT ---- */
.container {
  width: min(var(--content-wide), 100%);
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  margin-inline: auto;
}
.container--narrow { max-width: var(--content-default); }

/* ---- NAV ---- */
.site-nav {
  position: sticky; top: 0; z-index: 200;
  background: oklch(from var(--color-bg) l c h / 0.88);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s var(--ease-out);
}
.nav-inner { display: flex; align-items: center; height: 68px; gap: var(--space-8); }
.nav-logo {
  display: flex; align-items: center; gap: var(--space-3);
  font-family: var(--font-display); font-size: var(--text-lg);
  color: var(--color-text); letter-spacing: -0.01em; flex-shrink: 0;
}
.nav-logo-name { display: none; }
@media (min-width: 480px) { .nav-logo-name { display: block; } }

.nav-links { display: none; list-style: none; gap: var(--space-1); margin-left: auto; }
@media (min-width: 900px) { .nav-links { display: flex; } }
.nav-links a {
  display: block; padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted);
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.nav-links a:hover { color: var(--color-primary); background: var(--color-primary-highlight); }
.nav-links a.active { color: var(--color-primary); background: var(--color-primary-highlight); font-weight: 700; }

.nav-right { display: flex; align-items: center; gap: var(--space-3); margin-left: auto; }
@media (min-width: 900px) { .nav-right { margin-left: 0; } }

.btn-contact {
  display: none; font-size: var(--text-xs); font-weight: 700;
  background: var(--color-primary); color: white;
  padding: var(--space-2) var(--space-5); border-radius: var(--radius-full);
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}
@media (min-width: 900px) { .btn-contact { display: inline-flex; align-items: center; } }
.btn-contact:hover { background: var(--color-primary-hover); transform: translateY(-1px); }

.theme-btn {
  width: 38px; height: 38px; border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-btn:hover { background: var(--color-primary-highlight); color: var(--color-primary); }

.hamburger { display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 5px; width: 36px; height: 36px; border-radius: var(--radius-sm); }
@media (min-width: 900px) { .hamburger { display: none; } }
.hamburger span { display: block; width: 20px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all 0.2s; }

.mobile-menu {
  display: none; flex-direction: column;
  padding: var(--space-4) var(--space-6) var(--space-6); gap: var(--space-3);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-2);
}
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: var(--text-base); font-weight: 500; padding: var(--space-2) 0; color: var(--color-text-muted); }
.mobile-menu a.active { color: var(--color-primary); font-weight: 700; }

/* ---- PAGE HERO ---- */
.page-hero {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  border-bottom: 1px solid var(--color-border);
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 80% at 90% 50%, rgba(255,90,31,0.06), transparent);
  pointer-events: none;
}
.page-eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--color-primary);
  background: var(--color-primary-highlight); border: 1px solid var(--color-primary);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}
.page-title {
  font-family: var(--font-display); font-size: var(--text-hero); font-weight: 400;
  letter-spacing: -0.02em; color: var(--color-text); margin-bottom: var(--space-5); line-height: 1.05;
}
.page-title em { font-style: italic; color: var(--color-primary); }
.page-lead {
  font-size: var(--text-lg); color: var(--color-text-muted); max-width: 58ch; line-height: 1.65;
}

/* ---- SECTIONS ---- */
.section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
.section--alt { background: var(--color-surface); }
.section__header { margin-bottom: clamp(var(--space-10), 5vw, var(--space-16)); }
.section__tag {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--color-primary); margin-bottom: var(--space-4);
}
.section__tag::before { content: ''; display: block; width: 20px; height: 2px; background: var(--color-primary); border-radius: 2px; }
.section__title {
  font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 400;
  letter-spacing: -0.015em; color: var(--color-text); margin-bottom: var(--space-4);
}
.section__subtitle { font-size: var(--text-base); color: var(--color-text-muted); max-width: 58ch; line-height: 1.7; }

/* ---- BUTTONS ---- */
.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-full);
  transition: all var(--transition-interactive); white-space: nowrap; cursor: pointer; border: none;
}
.btn--primary { background: var(--color-primary); color: white; box-shadow: 3px 3px 0px rgba(0,0,0,0.4); }
.btn--primary:hover { background: var(--color-primary-hover); transform: translate(-1px,-1px); box-shadow: 4px 4px 0px rgba(0,0,0,0.4); }
.btn--ghost { color: var(--color-text-muted); border: 1.5px solid var(--color-border); }
.btn--ghost:hover { color: var(--color-primary); border-color: var(--color-primary); background: var(--color-primary-highlight); }

/* ---- CARDS ---- */
.card {
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: clamp(var(--space-6), 3vw, var(--space-10));
  transition: box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translate(-2px,-2px); border-color: var(--color-primary); }

/* ---- TAGS ---- */
.tag {
  display: inline-block; padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs); font-weight: 500; border-radius: var(--radius-full);
  background: var(--color-surface-offset); color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.tag--primary { background: var(--color-primary-highlight); color: var(--color-primary); border-color: transparent; }
.tag--accent { background: var(--color-accent-highlight); color: var(--color-accent); border-color: transparent; }
.tag-group { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ---- BADGE ---- */
.badge { display: inline-flex; align-items: center; gap: 5px; font-size: var(--text-xs); font-weight: 700; padding: 3px 10px; border-radius: var(--radius-full); }
.badge-live { background: var(--color-success-highlight); color: var(--color-success); }
.badge-live::before { content: "●"; font-size: 7px; }

/* ---- PROSE LIST ---- */
.prose-list { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.prose-list li { font-size: var(--text-sm); color: var(--color-text-muted); padding-left: var(--space-6); position: relative; line-height: 1.65; }
.prose-list li::before { content: "→"; position: absolute; left: 0; color: var(--color-primary); font-weight: 600; }
.prose-list li strong { color: var(--color-text); font-weight: 600; }

/* ---- FOOTER ---- */
.site-footer { border-top: 1px solid var(--color-border); padding-block: var(--space-10); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4); }
.footer-inner span { font-size: var(--text-xs); color: var(--color-text-faint); }
.footer-links { display: flex; gap: var(--space-6); list-style: none; }
.footer-links a { font-size: var(--text-xs); color: var(--color-text-faint); transition: color var(--transition-interactive); }
.footer-links a:hover, .footer-links a.active { color: var(--color-primary); }

/* ---- CALLOUT BLOCK ---- */
.callout-block {
  background: var(--color-surface-offset); border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary); border-radius: var(--radius-lg);
  padding: clamp(var(--space-5), 3vw, var(--space-8)); margin-block: var(--space-6);
}
.callout-block--accent { border-left-color: var(--color-accent); }
.callout-block__label { font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-primary); margin-bottom: var(--space-3); }
.callout-block__title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 400; color: var(--color-text); margin-bottom: var(--space-3); }
.callout-block__body { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.7; }
.callout-block__cols { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); margin-top: var(--space-5); }
@media (max-width: 600px) { .callout-block__cols { grid-template-columns: 1fr; } }
.callout-col__heading { font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-text-muted); margin-bottom: var(--space-3); }
.callout-col ul { list-style: none; }
.callout-col li { padding: var(--space-2) 0; font-size: var(--text-sm); color: var(--color-text-muted); border-bottom: 1px solid var(--color-divider); display: flex; align-items: flex-start; gap: var(--space-2); line-height: 1.5; }
.callout-col li:last-child { border-bottom: none; }
.callout-col li::before { content: "·"; color: var(--color-primary); font-weight: bold; flex-shrink: 0; margin-top: 1px; }

/* ---- READING PROGRESS ---- */
.reading-progress {
  position: fixed; top: 0; left: 0; height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 300; transition: width 0.1s linear; border-radius: 0 2px 2px 0;
  width: 0%;
}

/* ---- BACK TO TOP ---- */
.back-to-top {
  position: fixed; bottom: var(--space-8); right: var(--space-8); z-index: 50;
  width: 44px; height: 44px; background: var(--color-primary); color: white;
  border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md); opacity: 0; pointer-events: none; transform: translateY(12px);
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--color-primary-hover); transform: translateY(-2px); }

/* ---- REVEAL / FADE-IN ---- */
.reveal, .fade-in { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.visible, .fade-in.visible { opacity: 1; transform: none; }
@supports (animation-timeline: scroll()) {
  .fade-in { animation: reveal-fade linear both; animation-timeline: view(); animation-range: entry 0% entry 60%; }
  @keyframes reveal-fade { to { opacity: 1; transform: none; } }
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }