/* ==========================================================================
   DESIGN TOKENS
   Light theme = "paper" (default). Dark theme = "phosphor", toggled by
   setting data-theme="dark" on <html> (see js/theme.js).
   ========================================================================== */
:root {
  --bg: #F5EFE6;
  --panel: #F8F4EC;
  --text: #46342A;
  --border: #BFA98C;
  --accent: #C56B3A;
  --success: #5B7355;

  --shadow: 0 0 0 1px rgba(70, 52, 42, 0.08), 0 20px 60px -20px rgba(70, 52, 42, 0.35);

  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, monospace;
  --radius-window: 10px;
}

html[data-theme="dark"] {
  --bg: #181410;
  --panel: #1F1A14;
  --text: #E9DCC7;
  --border: #4A3F30;
  --accent: #E08A4F;
  --success: #7FA37A;

  --shadow: 0 0 0 1px rgba(0, 0, 0, 0.4), 0 20px 60px -20px rgba(0, 0, 0, 0.8);
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
}
ul { list-style: none; margin: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
pre { margin: 0; font-family: var(--font-mono); }

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

/* Visible keyboard focus everywhere, never suppressed */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   TYPE HELPERS
   ========================================================================== */
.micro-label {
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text) 50%, transparent);
}
.micro-label.accent { color: var(--accent); }
.micro-label.muted { color: color-mix(in srgb, var(--text) 40%, transparent); }

/* ==========================================================================
   BOOT SCREEN
   ========================================================================== */
.boot-screen {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  transition: opacity 0.4s ease;
}
.boot-screen.boot-hidden {
  opacity: 0;
  pointer-events: none;
}
.boot-box { width: 100%; max-width: 26rem; padding: 0 1.5rem; }
.boot-label {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
}
.boot-bar {
  margin: 0 0 1rem;
  white-space: pre;
  font-size: 0.65rem;
  line-height: 1;
  color: var(--accent);
}
.boot-steps { font-size: 0.75rem; }
.boot-steps li {
  opacity: 0.25;
  transition: opacity 0.3s ease;
  padding: 0.1rem 0;
}
.boot-steps li::before {
  content: "[  ] ";
}
.boot-steps li.step-active::before { content: "[..] "; }
.boot-steps li.step-done::before { content: "[ok] "; color: var(--success); }
.boot-steps li.step-active,
.boot-steps li.step-done { opacity: 1; }
.boot-ready {
  margin: 1rem 0 0;
  font-size: 0.75rem;
  color: var(--success);
}

/* ==========================================================================
   APP SHELL / OS WINDOW
   ========================================================================== */
.app {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.5rem 0.75rem 11rem;
  opacity: 0;
  transition: opacity 0.5s ease;
}
.app.app-visible { opacity: 1; }

.os-window {
  position: relative;
  border-radius: var(--radius-window);
  border: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100'><filter id='p'><feTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3'/></filter><rect width='100%25' height='100%25' filter='url(%23p)' opacity='0.045'/></svg>");
}

/* Title bar */
.title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  user-select: none;
}
.title-bar-dots { display: flex; gap: 0.5rem; }
.dot {
  width: 0.65rem; height: 0.65rem;
  border-radius: 50%;
  background: var(--border);
}
.dot-accent { background: color-mix(in srgb, var(--accent) 70%, transparent); }

.title-bar-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text) 60%, transparent);
}
.title-bar-sep { color: var(--border); }
.title-bar-status { display: inline-flex; align-items: center; gap: 0.4rem; }
.status-pulse {
  width: 0.35rem; height: 0.35rem;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.title-bar-controls { display: flex; align-items: center; gap: 0.75rem; }
.clock {
  font-size: 0.625rem;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--text) 60%, transparent);
}
.icon-button {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.25rem;
  color: color-mix(in srgb, var(--text) 70%, transparent);
  transition: color 0.15s ease, border-color 0.15s ease;
}
.icon-button:hover { color: var(--accent); border-color: var(--accent); }

/* Body: 40 / 60 split */
.os-body { display: grid; grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .os-body { grid-template-columns: 2fr 3fr; }
}

.panel-left {
  padding: 1.5rem;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
@media (min-width: 640px) {
  .panel-left {
    border-bottom: none;
    border-right: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
    padding: 2rem;
  }
}

.ascii-portrait {
  overflow-x: auto;
  font-size: 0.5rem;
  line-height: 0.62rem;
  color: var(--accent);
  white-space: pre;
  text-align: center;
  user-select: none;
}
@media (min-width: 640px) {
  .ascii-portrait { font-size: 0.6rem; line-height: 0.72rem; }
}

/* CRT Portrait Image */
.crt-portrait-container {
  position: relative;
  width: 100%;
  max-width: 280px;
  margin: 0.5rem auto 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 0 20px rgba(197, 107, 58, 0.15), inset 0 0 30px rgba(0, 0, 0, 0.1);
}
.crt-portrait-container::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.06) 2px,
    rgba(0, 0, 0, 0.06) 4px
  );
  pointer-events: none;
  border-radius: 8px;
}
.crt-portrait-img {
  display: block;
  width: 100%;
  height: auto;
  filter: contrast(1.05) brightness(0.95);
  transition: filter 0.3s ease;
}
.crt-portrait-container:hover .crt-portrait-img {
  filter: contrast(1.1) brightness(1);
}
html[data-theme="dark"] .crt-portrait-container {
  box-shadow: 0 0 25px rgba(224, 138, 79, 0.2), inset 0 0 30px rgba(0, 0, 0, 0.3);
}
html[data-theme="dark"] .crt-portrait-img {
  filter: contrast(1.1) brightness(0.9) saturate(0.9);
}
html[data-theme="dark"] .crt-portrait-container:hover .crt-portrait-img {
  filter: contrast(1.15) brightness(0.95) saturate(1);
}

.system-info {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.info-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
}

.panel-right { padding: 0; }
@media (min-width: 640px) {
  .panel-right { max-height: 70vh; overflow-y: auto; }
}

.content-section { padding: 2rem 1.5rem; scroll-margin-top: 6rem; }
@media (min-width: 640px) {
  .content-section { padding: 2rem; }
}

.section-divider {
  margin: 0 1.5rem;
  border-top: 1px dashed var(--border);
}
@media (min-width: 640px) {
  .section-divider { margin: 0 2rem; }
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.section-index { font-size: 0.625rem; color: var(--accent); }
.section-heading h2 {
  margin: 0;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 500;
}
.section-rule { flex: 1; height: 1px; background: var(--border); }

.prose {
  max-width: 60ch;
  font-size: 0.875rem;
  line-height: 1.7;
  color: color-mix(in srgb, var(--text) 90%, transparent);
}

.about-grid {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
}
@media (min-width: 640px) {
  .about-grid { grid-template-columns: 1fr 1fr; }
}
.about-card {
  padding-left: 1rem;
  border-left: 2px solid var(--border);
}
.about-card.accent { border-left-color: var(--accent); }
.about-card p:first-child { margin: 0 0 0.25rem; }
.about-card p:last-child { margin: 0; font-size: 0.875rem; }

/* Learning roadmap */
.roadmap li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  font-size: 0.875rem;
  padding: 0.3rem 0;
}
.roadmap .mark { font-family: "JetBrains Mono", monospace; font-size: 0.75rem; margin-top: 0.1rem; }
.roadmap .mark.done { color: var(--success); }
.roadmap .mark.active { color: var(--accent); }
.roadmap .mark.queued { color: color-mix(in srgb, var(--text) 40%, transparent); }
.roadmap li:has(.mark.queued) { color: color-mix(in srgb, var(--text) 50%, transparent); }

/* Projects */
.project-grid {
  display: grid;
  gap: 0.75rem;
}
@media (min-width: 640px) {
  .project-grid { grid-template-columns: 1fr 1fr; }
}

.project-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  background: color-mix(in srgb, var(--bg) 40%, transparent);
  transition: border-color 0.15s ease;
}
.project-card:hover,
.project-card:focus-visible { border-color: var(--accent); }

.project-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}
.project-card-name {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 500;
}
.project-card:hover .project-card-name,
.project-card:focus-visible .project-card-name { color: var(--accent); }
.project-card-link-icon {
  flex-shrink: 0;
  margin-top: 0.15rem;
  color: color-mix(in srgb, var(--text) 30%, transparent);
}
.project-card:hover .project-card-link-icon,
.project-card:focus-visible .project-card-link-icon { color: var(--accent); }

.project-card-desc {
  margin: 0.5rem 0 0;
  font-size: 0.75rem;
  line-height: 1.6;
  min-height: 2.5rem;
  color: color-mix(in srgb, var(--text) 60%, transparent);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card-meta {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 1rem;
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text) 50%, transparent);
}
.project-card-meta .lang { display: inline-flex; align-items: center; gap: 0.4rem; }
.project-card-meta .lang-dot {
  width: 0.35rem; height: 0.35rem;
  border-radius: 50%;
  background: var(--accent);
}
.project-card-meta .stat { display: inline-flex; align-items: center; gap: 0.3rem; }

.project-skeleton {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  animation: skeleton-pulse 1.6s ease-in-out infinite;
}
@keyframes skeleton-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.skeleton-line {
  height: 0.75rem;
  border-radius: 4px;
  background: color-mix(in srgb, var(--border) 55%, transparent);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
  padding: 2.5rem 1.5rem;
  border: 1px dashed var(--border);
  border-radius: 6px;
}
.empty-state svg { color: color-mix(in srgb, var(--text) 40%, transparent); }
.empty-state.is-error svg { color: var(--accent); }
.empty-state-title {
  margin: 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.empty-state-desc {
  margin: 0;
  max-width: 22rem;
  font-size: 0.75rem;
  color: color-mix(in srgb, var(--text) 60%, transparent);
}

/* Contact */
.contact-list { display: flex; flex-direction: column; gap: 0.35rem; }
.contact-list a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.4rem 0.5rem;
  margin: 0 -0.5rem;
  border-radius: 4px;
  border: 1px solid transparent;
  font-size: 0.875rem;
  color: color-mix(in srgb, var(--text) 80%, transparent);
  transition: color 0.15s ease, border-color 0.15s ease;
}
.contact-list a:hover,
.contact-list a:focus-visible {
  border-color: var(--border);
  color: var(--accent);
}
.contact-list a:hover .micro-label,
.contact-list a:focus-visible .micro-label { color: var(--accent); }

/* Status bar */
.status-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text) 50%, transparent);
}
@media (max-width: 480px) {
  .hide-sm { display: none; }
}

.tagline {
  margin: 1rem 0 0;
  text-align: center;
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text) 30%, transparent);
}
.tagline-sub {
  margin-top: 0.25rem;
  font-size: 0.575rem;
  text-transform: none;
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--text) 25%, transparent);
}
.tagline-credit {
  margin-top: 0.25rem;
  margin-bottom: 1rem;
  font-size: 0.575rem;
  text-transform: none;
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--text) 25%, transparent);
}

/* ==========================================================================
   TERMINAL
   ========================================================================== */
.terminal {
  position: fixed;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.75rem;
  z-index: 40;
  max-width: 48rem;
  margin: 0 auto;
  border-radius: var(--radius-window);
  border: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.terminal.terminal-visible { opacity: 1; transform: translateY(0); }
@media (min-width: 640px) {
  .terminal { left: 1.5rem; right: 1.5rem; bottom: 1.5rem; }
}

.terminal-header {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text) 60%, transparent);
}
.terminal.terminal-collapsed #terminal-body { display: none; }
.terminal.terminal-collapsed #terminal-chevron { transform: rotate(180deg); }

.terminal-log {
  max-height: 13rem;
  overflow-y: auto;
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  line-height: 1.6;
}
.terminal-line { white-space: pre-wrap; }
.terminal-line .prompt-echo { color: var(--accent); }
.terminal-line.line-output { color: color-mix(in srgb, var(--text) 70%, transparent); }
.terminal-line.line-system { color: color-mix(in srgb, var(--text) 40%, transparent); }

.terminal-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}
.terminal-prompt { font-size: 0.75rem; color: var(--accent); white-space: nowrap; }
.terminal-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text);
}
.terminal-input::placeholder { color: color-mix(in srgb, var(--text) 30%, transparent); }

.term-cursor {
  display: inline-block;
  width: 0.5em;
  height: 1em;
  background: var(--accent);
  animation: blink 1s step-end infinite;
}
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* Custom scrollbar to match the aesthetic */
.retro-scroll::-webkit-scrollbar { width: 8px; height: 8px; }
.retro-scroll::-webkit-scrollbar-track { background: transparent; }
.retro-scroll::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
