/* ==========================================================================
   DinuDante.in — shared design system
   Single source of truth for colour, type, spacing, containers, controls,
   navigation, footer, focus and motion. Page-specific layout lives in
   home.css (portfolio / setup / privacy / 404), resume.css and setup.css.
   ========================================================================== */

:root {
  color-scheme: dark;

  /* Surfaces and ink */
  --bg: #0c100e;
  --surface: #101612;
  --raised: #151b17;
  --text: #f2f0e8;
  --text-secondary: #c2c9bf;
  --muted: #9ba49c;
  --line: #242e27;
  --border-strong: #3b493f;

  /* Signature accents */
  --green: #859d7b;
  --accent: #859d7b;
  --deep: #53695a;
  --navy: #1b2a35;
  --navy2: #253744;
  --red: #a85f59;
  --purple: #80719a;
  --paper: #d8d5c5;

  /* Ink that sits on top of an --accent fill (contrast-checked per theme) */
  --on-accent: #0d1512;
  --on-deep: #ffffff;
  --shadow: rgba(0, 0, 0, 0.25);

  /* Type */
  --font-display: Georgia, "Times New Roman", serif;
  --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 3rem;

  /* Rhythm */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --radius-sm: 5px;
  --radius: 8px;
  --radius-pill: 999px;
  --control-height: 44px;
  --nav-height: 76px;
  --shell-max: 1120px;
}

[data-theme="day"] {
  color-scheme: light;
  --bg: #faf8f3;
  --surface: #f5f3ec;
  --raised: #e8e5dc;
  --text: #171a18;
  --text-secondary: #353a36;
  --muted: #5e6660;
  --line: #d1ccbf;
  --border-strong: #b5b0a3;
  --green: #2c4232;
  --accent: #2c4232;
  --deep: #25362a;
  --navy: #1b2a35;
  --navy2: #253744;
  --red: #8d4a45;
  --purple: #61527a;
  --paper: #faf8ef;
  --on-accent: #ffffff;
  --on-deep: #ffffff;
  --shadow: rgba(38, 52, 44, 0.12);
}

/* --------------------------------------------------------------- reset */

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

html {
  scroll-padding-top: calc(var(--nav-height) + 16px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  transition: background-color 0.25s, color 0.25s;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); font-weight: 400; color: var(--text); }
h1 { font-size: clamp(2.5rem, 5vw, 4rem); line-height: 1.08; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); line-height: 1.2; letter-spacing: -0.02em; }
h3 { font-size: clamp(1.4rem, 2vw, 1.8rem); line-height: 1.3; }

a { color: inherit; text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--accent); }
button { font: inherit; }
img { display: block; max-width: 100%; height: auto; }
svg { max-width: 100%; }

.shell { width: min(calc(100% - clamp(24px, 5vw, 64px)), var(--shell-max)); margin-inline: auto; }

/* ------------------------------------------------- focus and motion */

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.theme-toggle:focus-visible, .menu-toggle:focus-visible, .filter-btn:focus-visible { outline-offset: 3px; }

/* Smooth scrolling is opt-in so reduced-motion users are never moved. */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

.skip-link { position: absolute; left: -9999px; display: inline-flex; align-items: center; min-height: var(--control-height); }
.skip-link:focus {
  left: 12px; top: 12px; z-index: 100;
  display: inline-flex; align-items: center;
  min-height: var(--control-height); padding: 0 var(--space-4);
  background: var(--surface); color: var(--text);
  border: 2px solid var(--accent); border-radius: var(--radius-sm);
}
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* -------------------------------------------------------- navigation */

.site-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-5);
  min-height: var(--nav-height);
  width: 100%;
  padding-inline: max(clamp(12px, 2.5vw, 32px), calc((100vw - var(--shell-max)) / 2));
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--line);
  border-bottom-color: color-mix(in srgb, var(--line) 82%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background-color 0.25s, border-color 0.25s;
}
.site-nav::after {
  content: ""; position: absolute; inset: auto 0 -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--red), var(--paper), var(--purple), var(--green), transparent);
  opacity: 0.45; pointer-events: none;
}
[data-theme="day"] .site-nav { background: color-mix(in srgb, var(--surface) 92%, transparent); }

.mark {
  display: inline-flex; align-items: center; gap: 11px;
  min-height: var(--control-height);
  font-family: var(--font-display);
  font-size: 1.05rem; font-weight: 400; letter-spacing: 0.01em;
  white-space: nowrap; color: var(--text);
}
.mark:hover { color: var(--text); }
.mark-symbol {
  width: 38px; height: 38px; flex: 0 0 auto;
  border-radius: 50%; object-fit: cover; object-position: center;
  transition: transform 0.25s;
}
.mark:hover .mark-symbol { transform: rotate(12deg); }
.mark-name { display: inline-block; }
.mark-name b { font-weight: 400; color: var(--accent); }

.nav-actions { display: flex; align-items: center; gap: clamp(12px, 2vw, 22px); min-width: 0; }
.nav-links { display: flex; align-items: center; gap: clamp(12px, 1.6vw, 22px); flex-wrap: wrap; }
.nav-link {
  position: relative;
  display: inline-flex; align-items: center;
  min-height: var(--control-height);
  font-size: 0.85rem; color: var(--muted);
}
.nav-link:hover { color: var(--text); }
.nav-link::after {
  content: ""; position: absolute; right: 0; bottom: 10px; left: 0; height: 1px;
  background: var(--accent);
  transform: scaleX(0); transition: transform 0.2s;
}
.nav-link:hover::after, .nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--text); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); opacity: 0.8; }

.theme-control { display: flex; align-items: center; gap: var(--space-2); }
.theme-label {
  min-width: 3.2em; text-align: right;
  font-family: var(--font-mono); font-size: 0.68rem;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted);
}
.theme-toggle {
  position: relative; flex: 0 0 auto;
  width: 62px; height: var(--control-height); padding: 0;
  border: 1px solid var(--line); border-radius: var(--radius-pill);
  background: #102536; cursor: pointer;
  transition: background 0.25s, border-color 0.25s;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle::before {
  content: ""; position: absolute; z-index: 2;
  top: 50%; left: 5px; width: 24px; height: 24px; margin-top: -12px;
  border-radius: 50%; background: #e9e3ca;
  box-shadow: inset -7px -3px 0 #c9c4b4, 0 1px 4px rgba(0, 0, 0, 0.35);
  transform: translateX(26px); transition: transform 0.3s ease, background 0.3s, box-shadow 0.3s;
}
[data-theme="day"] .theme-toggle { background: #6f9aa0; }
[data-theme="day"] .theme-toggle::before {
  background: #e6d528; box-shadow: 0 1px 6px #d1b92d; transform: translateX(0);
}

.menu-toggle {
  display: none;
  align-items: center; justify-content: center; gap: 8px;
  min-height: var(--control-height); padding: 0 var(--space-4);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text);
  font-size: 0.82rem; cursor: pointer;
}
.menu-toggle:hover { border-color: var(--accent); }

@media (max-width: 900px) {
  /* Links collapse behind the menu button only where scripting is available.
     Without JavaScript the `js` class is never set, so they stay visible and
     usable. The class is applied before first paint, so enabling the menu
     costs no layout shift. */
  .js .nav-links { display: none; }
  .js .menu-toggle { display: inline-flex; }
  .js .nav-links.is-open {
    display: flex !important;
    position: absolute; top: 100%; left: 0; right: 0; z-index: 60;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: var(--space-2) max(clamp(12px, 2.5vw, 32px), calc((100vw - var(--shell-max)) / 2)) var(--space-4);
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 32px var(--shadow);
  }
  .js .nav-links.is-open .nav-link {
    width: 100%; min-height: 48px; font-size: 0.95rem;
    border-bottom: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
  }
  .js .nav-links.is-open .nav-link:last-child { border-bottom: none; }
  .js .nav-links.is-open .nav-link::after { display: none; }
}
@media (max-width: 600px) { .theme-label { display: none; } }

/* ----------------------------------------------------------- controls */

.button {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: var(--control-height); padding: 0 18px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  color: var(--text); font-size: 0.86rem; white-space: nowrap; cursor: pointer;
  transition: transform 0.16s, border-color 0.16s, background 0.16s, box-shadow 0.16s;
}
.button:hover { color: var(--text); border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 20px var(--shadow); }
.button-primary { background: var(--deep); border-color: var(--deep); color: var(--on-deep); }
.button-primary:hover { color: var(--on-deep); background: color-mix(in srgb, var(--deep) 84%, var(--purple)); border-color: var(--accent); }
.button:not(.button-primary) .ico, .button:not(.button-primary) .brand-icon { color: var(--accent); }

.ico { display: inline-grid; min-width: 1.1em; place-items: center; font-family: var(--font-body); }
.brand-icon { width: 17px; height: 17px; flex-shrink: 0; fill: currentColor; }

.eyebrow {
  display: block;
  font-family: var(--font-mono); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.14em; color: var(--accent);
}

/* ------------------------------------------------------------- footer */

footer { margin-top: var(--space-8); padding-block: 40px 48px; border-top: 1px solid var(--line); }
.footer-row {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 20px;
  color: var(--muted); font-size: 0.78rem;
}
.footer-row > * { min-width: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.footer-links a {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: var(--control-height); padding-inline: 2px;
}
.footer-links a:hover { color: var(--accent); }
.footer-links .brand-icon { width: 15px; height: 15px; color: var(--accent); }
@media (max-width: 720px) { .footer-row { flex-direction: column-reverse; align-items: flex-start; } }

/* -------------------------------------------------------------- print */

@media print {
  .site-nav, footer, .skip-link, .theme-control, .menu-toggle { display: none !important; }
}