/*
 * warm-photo.css — Foundation for the warm-photographic archetype
 *
 * Archetype ID: warm-photographic
 * Craft profile (reference-corpus.md):
 *   radius system: soft — 12px card / 8px input / 6px button
 *   button style:  rounded; warm-tinted shadow; soft fill matching photo palette
 *   divider style: photo-edge bleed or subtle warm-tinted rule
 *   icon treatment: warm-tinted circles; 24px; soft drop shadow
 *
 * 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 --- */

:root {
  /* Accent — override per brand */
  --color-accent:          #e07b4f;          /* warm terracotta default */
  --color-accent-subtle:   rgba(224, 123, 79, 0.10);
  --color-accent-hover:    rgba(224, 123, 79, 0.18);

  /* Surface palette — warm, human, approachable */
  --color-bg:              #fdfaf7;          /* warm white */
  --color-bg-raised:       #f7f1ea;
  --color-bg-sunken:       #f0e6d8;
  --color-fg:              #1e1510;
  --color-fg-muted:        #6b4f3a;
  --color-fg-faint:        #aa8a78;
  --color-border:          rgba(120, 80, 50, 0.12);
  --color-border-strong:   rgba(120, 80, 50, 0.22);

  /* Code surface */
  --code-bg:               rgba(120, 80, 50, 0.06);

  /* Radius system — soft, at least 3 distinct values (N13 compliance) */
  --radius-sm:             4px;             /* micro elements */
  --radius-btn:            6px;             /* button */
  --radius-input:          8px;             /* input */
  --radius-card:           12px;            /* card */
  --radius-circle:         9999px;          /* icon circles + pill badges */

  /* Shadow tokens — warm, soft, diffuse */
  --shadow-card:           0 1px 4px rgba(120, 80, 50, 0.08),
                           0 0 0 1px rgba(120, 80, 50, 0.08);
  --shadow-card-hover:     0 8px 28px rgba(120, 80, 50, 0.14),
                           0 0 0 1px rgba(120, 80, 50, 0.10);
  --shadow-btn:            0 2px 8px rgba(224, 123, 79, 0.28);
  --shadow-btn-hover:      0 4px 16px rgba(224, 123, 79, 0.36);
  --shadow-icon:           0 2px 8px rgba(120, 80, 50, 0.20);
  --shadow-elevated:       0 12px 40px rgba(120, 80, 50, 0.16);

  /* Transition — warm, gentle */
  --transition-fast:       160ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:       260ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:       400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Spacing scale */
  --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 — warm circles, 24px (craft profile) */
  --icon-feature: 24px;
  --icon-nav:     18px;
  --icon-inline:  16px;
}

/* --- 2. Element Overrides (N18 compliance) --- */

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

/* Custom focus ring — warm accent (N18, N15 compliance) */
:focus-visible {
  outline:        2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Custom scrollbar — warm, thin */
::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg-raised); }
::-webkit-scrollbar-thumb {
  background:    var(--color-border-strong);
  border-radius: var(--radius-circle);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-accent); }

/* Code blocks — warm, inline */
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 — warm animated underline (N17 compliance) */
a:not([class]) {
  color:                    var(--color-accent);
  text-decoration:          underline;
  text-decoration-color:    transparent;
  text-underline-offset:    3px;
  text-decoration-thickness: 1px;
  transition:               text-decoration-color var(--transition-fast);
}
a:not([class]):hover {
  text-decoration-color: var(--color-accent);
}

/* --- 3. Component Classes --- */

/* --- Button --- */

.btn {
  display:          inline-flex;
  align-items:      center;
  gap:              var(--space-2);
  padding:          11px 22px;
  border-radius:    var(--radius-btn);     /* 6px — soft, rounded */
  font-size:        0.9375rem;
  font-weight:      500;
  line-height:      1;
  letter-spacing:   0.01em;
  cursor:           pointer;
  white-space:      nowrap;
  transition:       box-shadow    var(--transition-fast),
                    transform     var(--transition-fast),
                    background-color var(--transition-fast);
  /* Warm-tinted shadow + soft fill — craft profile */
  background-color: var(--color-accent);
  color:            #ffffff;
  border:           none;
  box-shadow:       var(--shadow-btn);
}

.btn:hover {
  box-shadow:       var(--shadow-btn-hover);
  transform:        translateY(-1px);
  background-color: color-mix(in srgb, var(--color-accent) 90%, #000);
}

.btn:active {
  transform:  translateY(0px);
  box-shadow: 0 1px 3px rgba(224, 123, 79, 0.16);
}

.btn:focus-visible {
  outline:        2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Ghost / soft fill variant */
.btn-ghost {
  background-color: var(--color-accent-subtle);
  color:            var(--color-accent);
  border:           none;
  box-shadow:       none;
}

.btn-ghost:hover {
  background-color: var(--color-accent-hover);
  transform:        translateY(-1px);
  box-shadow:       0 2px 8px rgba(224, 123, 79, 0.16);
}

.btn-ghost:active {
  transform:        translateY(0px);
  box-shadow:       none;
}

/* --- Card --- */

.card {
  background:    var(--color-bg-raised);
  border-radius: var(--radius-card);       /* 12px — soft */
  box-shadow:    var(--shadow-card);
  padding:       var(--space-6);
  transition:    box-shadow var(--transition-base),
                 transform  var(--transition-base);
}

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

/* --- Badge --- */

.badge {
  display:          inline-flex;
  align-items:      center;
  gap:              var(--space-1);
  padding:          3px 10px;
  border-radius:    var(--radius-circle);  /* pill — categorical difference */
  font-size:        0.75rem;
  font-weight:      500;
  letter-spacing:   0.03em;
  text-transform:   uppercase;
  background-color: var(--color-accent-subtle);
  color:            var(--color-accent);
  border:           1px solid rgba(224, 123, 79, 0.20);
}

/* --- Input --- */

.input {
  display:          block;
  width:            100%;
  padding:          10px 14px;
  border-radius:    var(--radius-input);   /* 8px — distinct from card and btn */
  font-size:        0.9375rem;
  background-color: var(--color-bg);
  color:            var(--color-fg);
  border:           1px solid var(--color-border-strong);
  transition:       border-color var(--transition-fast),
                    box-shadow   var(--transition-fast);
  -webkit-appearance: none;
  appearance:       none;
}

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

.input:focus {
  outline:      none;
  border-color: var(--color-accent);
  box-shadow:   0 0 0 3px var(--color-accent-subtle);
}

/* --- 4. Utility Classes --- */

/* Scroll-triggered reveal (honors prefers-reduced-motion) */
.reveal {
  opacity:    0;
  transform:  translateY(20px);
  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 — warm accent direction */
.gradient-text {
  background-image:    linear-gradient(135deg, var(--color-accent) 0%, color-mix(in srgb, var(--color-accent) 60%, #c2410c) 100%);
  -webkit-background-clip: text;
  background-clip:     text;
  -webkit-text-fill-color: transparent;
  color:               transparent;
}

/* Glass — warm, diffuse */
.glass {
  background:  rgba(253, 250, 247, 0.78);
  backdrop-filter:         blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border:      1px solid var(--color-border);
}

/* Divider — warm-tinted rule */
.divider {
  height:     1px;
  border:     none;
  background: linear-gradient(to right,
    transparent, var(--color-accent-subtle) 15%,
    var(--color-border-strong) 30%, var(--color-border-strong) 70%,
    var(--color-accent-subtle) 85%,
    transparent
  );
  margin: var(--space-12) 0;
}

/* Icon container — warm-tinted circle + soft shadow (craft profile) */
.icon-container {
  display:          inline-flex;
  align-items:      center;
  justify-content:  center;
  width:            var(--icon-feature);
  height:           var(--icon-feature);
  border-radius:    var(--radius-circle);  /* circle — craft profile */
  background-color: var(--color-accent-subtle);
  color:            var(--color-accent);
  box-shadow:       var(--shadow-icon);    /* soft drop shadow — craft profile */
  flex-shrink:      0;
}