/*
 * minimal-luxury.css — Foundation for the minimal-luxury archetype
 *
 * Archetype ID: minimal-luxury
 * Craft profile (reference-corpus.md):
 *   radius system: mixed — 20px card / 12px input / 8px button
 *   button style:  ghost or borderless; minimal fill; no visible shadow
 *   divider style: spacing only — no visible line between sections
 *   icon treatment: none or near-invisible; no colored backgrounds
 *
 * Override --color-accent (and related tokens) via a :root block in the
 * generated page to brand this foundation without touching the file.
 *
 * Issue: #1048 — custom CSS component library per archetype
 */

/* ==========================================================================
   1. Design Tokens — CSS Custom Properties
   ========================================================================== */

:root {
  /* Accent — override per brand */
  --color-accent:          #1a1a1a;          /* near-black default — silent luxury */
  --color-accent-subtle:   rgba(26, 26, 26, 0.06);
  --color-accent-hover:    rgba(26, 26, 26, 0.10);

  /* Surface palette — near-white / pure */
  --color-bg:              #ffffff;
  --color-bg-raised:       #f9f9f9;
  --color-bg-sunken:       #f3f3f3;
  --color-fg:              #111111;
  --color-fg-muted:        #555555;
  --color-fg-faint:        #aaaaaa;
  --color-border:          rgba(0, 0, 0, 0.08);
  --color-border-strong:   rgba(0, 0, 0, 0.14);

  /* Code surface */
  --code-bg:               rgba(0, 0, 0, 0.04);

  /* Radius system — mixed, at least 3 distinct values (N13 compliance) */
  --radius-sm:             4px;             /* micro elements */
  --radius-btn:            8px;             /* button */
  --radius-input:          12px;            /* input */
  --radius-card:           20px;            /* card — most generous */
  --radius-pill:           9999px;          /* pill badge */

  /* Shadow tokens — near-zero, luxury restraint */
  --shadow-card:           0 1px 2px rgba(0, 0, 0, 0.04),
                           0 0 0 1px rgba(0, 0, 0, 0.06);
  --shadow-card-hover:     0 4px 16px rgba(0, 0, 0, 0.06),
                           0 0 0 1px rgba(0, 0, 0, 0.08);
  --shadow-btn:            none;            /* no visible shadow — craft profile */
  --shadow-elevated:       0 8px 40px rgba(0, 0, 0, 0.08);

  /* Transition — measured, unhurried */
  --transition-fast:       180ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:       280ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:       420ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Spacing scale — generous air */
  --space-1:4px; --space-2:8px; --space-3:12px; --space-4:16px;
  --space-6:24px; --space-8:32px; --space-12:48px; --space-16:64px; --space-24:96px;

  /* Icon sizing — contextual (craft profile: near-invisible, no backgrounds) */
  --icon-feature: 20px;
  --icon-nav:     16px;
  --icon-inline:  14px;
}

/* ==========================================================================
   2. Element Overrides — Professional baseline defaults (N18 compliance)
   ========================================================================== */

/* Custom selection — subtle black tint */
::selection {
  background: var(--color-accent-subtle);
  color:      var(--color-fg);
}

/* Custom focus ring — restrained, thin (N18, N15 compliance) */
:focus-visible {
  outline:        1.5px solid var(--color-fg);
  outline-offset: 3px;
}

/* Custom scrollbar — ultra-thin, near-invisible */
::-webkit-scrollbar       { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background:    rgba(0, 0, 0, 0.18);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover { background: rgba(0, 0, 0, 0.32); }

/* Code blocks — clean, minimal */
code, kbd {
  background:    var(--code-bg);
  border-radius: var(--radius-sm);
  padding:       2px 6px;
  font-size:     0.875em;
  font-family:   ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* Links — custom underline (N17 compliance) */
a:not([class]) {
  color:                    var(--color-fg);
  text-decoration:          underline;
  text-decoration-color:    rgba(0, 0, 0, 0.25);
  text-underline-offset:    3px;
  text-decoration-thickness: 1px;
  transition:               text-decoration-color var(--transition-fast);
}
a:not([class]):hover {
  text-decoration-color: var(--color-fg);
}

/* ==========================================================================
   3. Component Classes — Buttons, Cards, Badges, Inputs
   ========================================================================== */

/* --- Button (N14, N15, N20 compliance) ----------------------------------- */

.btn {
  display:          inline-flex;
  align-items:      center;
  gap:              var(--space-2);
  padding:          10px 22px;
  border-radius:    var(--radius-btn);     /* 8px */
  font-size:        0.9375rem;
  font-weight:      400;
  line-height:      1;
  letter-spacing:   0.04em;
  cursor:           pointer;
  white-space:      nowrap;
  transition:       background-color var(--transition-fast),
                    color            var(--transition-fast),
                    transform        var(--transition-fast);
  /* Minimal fill — craft profile: ghost or borderless, minimal fill */
  background-color: var(--color-fg);
  color:            var(--color-bg);
  border:           none;
  box-shadow:       none;                  /* no shadow — craft profile */
}

.btn:hover {
  background-color: rgba(17, 17, 17, 0.80);
  transform:        translateY(-1px);      /* lift on hover — N20 compliance */
}

.btn:active {
  transform:        translateY(0px);       /* press-down — N20 compliance */
  background-color: rgba(17, 17, 17, 0.90);
}

.btn:focus-visible {
  outline:        1.5px solid var(--color-fg);
  outline-offset: 3px;                     /* custom focus ring — N18 compliance */
}

/* Ghost / borderless variant */
.btn-ghost {
  background-color: transparent;
  color:            var(--color-fg);
  border:           none;
  box-shadow:       none;
}

.btn-ghost:hover {
  background-color: var(--color-accent-hover);
  transform:        translateY(-1px);
}

.btn-ghost:active {
  transform:        translateY(0px);
  background-color: var(--color-accent-subtle);
}

/* --- Card (N13 — distinct radius from button) ----------------------------- */

.card {
  background:    var(--color-bg-raised);
  border-radius: var(--radius-card);       /* 20px — most generous in system */
  box-shadow:    var(--shadow-card);
  padding:       var(--space-8);
  transition:    box-shadow var(--transition-base),
                 transform  var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform:  translateY(-2px);
}

/* --- Badge (N13 — distinct radius from card and button) ------------------- */

.badge {
  display:          inline-flex;
  align-items:      center;
  gap:              var(--space-1);
  padding:          3px 10px;
  border-radius:    var(--radius-pill);    /* pill — categorical difference */
  font-size:        0.75rem;
  font-weight:      400;
  letter-spacing:   0.06em;
  text-transform:   uppercase;
  background-color: var(--color-bg-sunken);
  color:            var(--color-fg-muted);
  border:           none;
}

/* --- Input (N13, N15, N18 compliance) ------------------------------------ */

.input {
  display:          block;
  width:            100%;
  padding:          10px 16px;
  border-radius:    var(--radius-input);   /* 12px — distinct from card and btn */
  font-size:        0.9375rem;
  font-weight:      400;
  background-color: var(--color-bg);
  color:            var(--color-fg);
  border:           1px solid var(--color-border);
  transition:       border-color var(--transition-fast);
  -webkit-appearance: none;
  appearance:       none;
}

.input::placeholder { color: var(--color-fg-faint); }

.input:focus {
  outline:      none;
  border-color: var(--color-fg);
  box-shadow:   0 0 0 2px var(--color-accent-subtle); /* custom focus ring — N18 */
}

/* ==========================================================================
   4. Utility Classes — Animations, Reveals, Layout Helpers
   ========================================================================== */

/* Scroll-triggered reveal (honors prefers-reduced-motion) */
.reveal {
  opacity:    0;
  transform:  translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal.visible {
    opacity:    1;
    transform:  none;
    transition: none;
  }
}

/* Gradient text — luxury monochrome */
.gradient-text {
  background-image:    linear-gradient(135deg, var(--color-fg) 0%, var(--color-fg-muted) 100%);
  -webkit-background-clip: text;
  background-clip:     text;
  -webkit-text-fill-color: transparent;
  color:               transparent;
}

/* Glass — clean, near-invisible */
.glass {
  background:  rgba(255, 255, 255, 0.85);
  backdrop-filter:         blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border:      1px solid var(--color-border);
}

/* Divider — spacing only, no visible line (craft profile) */
.divider {
  height:     var(--space-12);  /* spacing creates the visual break — no line */
  border:     none;
  background: none;
  display:    block;
}

/* Icon container — near-invisible, no background (craft profile) */
.icon-container {
  display:          inline-flex;
  align-items:      center;
  justify-content:  center;
  width:            var(--icon-feature);
  height:           var(--icon-feature);
  color:            var(--color-fg-faint); /* near-invisible */
  flex-shrink:      0;
}