/* skui-amethyst.css  deep violet / amethyst dark theme
   indigo and purple depths, soft lavender highlights,
   hexagonal geometric grid pattern on body,
   classical display serif + clean geometric body */

@import url('../skui.css');

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700;800&family=Raleway:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');

:root {
  --bg-void:    hsl(268, 38%, 7%);
  --bg-deep:    hsl(265, 34%, 10%);
  --bg-base:    hsl(262, 30%, 14%);
  --bg-raised:  hsl(260, 26%, 18%);
  --bg-float:   hsl(258, 24%, 22%);
  --bg-hover:   hsl(256, 22%, 27%);

  --surf-t:     hsl(259, 25%, 21%);
  --surf-b:     hsl(265, 32%, 11%);
  --surf-btn-t: hsl(257, 24%, 25%);
  --surf-btn-b: hsl(265, 34%, 9%);

  --text-primary:   hsl(280, 70%, 94%);
  --text-secondary: hsl(275, 40%, 75%);
  --text-muted:     hsl(268, 20%, 52%);
  --text-inverse:   hsl(268, 38%, 7%);
  --text-link:      hsl(270, 90%, 74%);

  /* vivid violet / purple accent */
  --blue-t:    hsl(272, 85%, 68%);
  --blue-b:    hsl(268, 80%, 52%);
  --blue-lit:  hsl(276, 90%, 78%);
  --blue-dim:  hsl(264, 72%, 34%);

  /* soft lavender highlight */
  --secondary-t:    hsl(292, 70%, 68%);
  --secondary-b:    hsl(286, 62%, 50%);
  --secondary-lit:  hsl(298, 75%, 76%);
  --secondary-glow: rgba(160, 80, 220, 0.30);

  --danger-t:  #e04060;
  --danger-b:  #b81838;
  --success-t: #40c888;
  --success-b: #209860;
  --warn-t:    #e0a840;
  --warn-b:    #b07818;

  --border-hi:  rgba(180, 120, 255, 0.14);
  --border-lo:  rgba(10, 0, 30, 0.65);
  --border-mid: rgba(10, 0, 30, 0.35);

  --shadow-sm:    0 1px 4px rgba(0,0,0,0.55), 0 1px 0 rgba(160,100,255,0.07);
  --shadow-md:    0 4px 22px rgba(0,0,0,0.60), 0 1px 6px rgba(0,0,0,0.42);
  --shadow-lg:    0 10px 48px rgba(0,0,0,0.70), 0 3px 14px rgba(0,0,0,0.48);
  --shadow-inset: inset 0 2px 8px rgba(0,0,0,0.48), inset 0 1px 0 rgba(160,100,255,0.06);

  --bevel-hi: inset 0 1px 0 rgba(180, 120, 255, 0.12);
  --bevel-lo: inset 0 -1px 0 rgba(0, 0, 0, 0.58);

  --font-sans:    'Raleway', 'Segoe UI', sans-serif;
  --font-mono:    'Cascadia Code', 'Consolas', monospace;
  --font-display: 'Cinzel', 'Georgia', serif;
}

/* hexagonal grid pattern + deep violet gradient */
body {
  background-color: hsl(268, 38%, 7%);
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='52' height='60'%3E%3Cpolygon points='26,2 50,15 50,45 26,58 2,45 2,15' fill='none' stroke='rgba(140,80,220,0.08)' stroke-width='1'/%3E%3Cpolygon points='26,11 42,20 42,40 26,49 10,40 10,20' fill='none' stroke='rgba(140,80,220,0.055)' stroke-width='0.8'/%3E%3C/svg%3E"),
    radial-gradient(ellipse 65% 45% at 20% 18%, rgba(80,20,160,0.26) 0%, transparent 65%),
    radial-gradient(ellipse 50% 40% at 82% 78%, rgba(40,10,110,0.22) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 55% 48%, rgba(60,15,140,0.14) 0%, transparent 55%),
    linear-gradient(148deg,
      hsl(270,40%,7%)  0%,
      hsl(265,36%,9%)  30%,
      hsl(260,32%,12%) 65%,
      hsl(268,38%,7%)  100%
    );
  background-attachment: fixed;
}

body::before { opacity: 0.020; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  text-shadow: 0 1px 4px rgba(0,0,0,0.55), 0 0 20px rgba(160,100,255,0.12);
}

h5, h6 { font-family: var(--font-sans); letter-spacing: 0.06em; text-transform: uppercase; font-size: 0.85em; }

.panel {
  background: linear-gradient(165deg, var(--bg-raised) 0%, var(--bg-float) 100%);
  border: 1px solid rgba(80,20,160,0.38);
  box-shadow:
    var(--shadow-md),
    inset 0 1px 0 rgba(180,120,255,0.10),
    inset 0 -1px 0 rgba(0,0,0,0.52);
}

/* vivid violet gloss button */
.btn--primary {
  background-color: var(--blue-b);
  background-image:
    linear-gradient(180deg,
      rgba(255,255,255,0.22)  0%,
      rgba(255,255,255,0.07) 49%,
      transparent            50%,
      rgba(0,0,0,0.10)       100%
    ),
    linear-gradient(180deg, var(--blue-t) 0%, var(--blue-b) 100%);
  border: 1px solid rgba(30,0,90,0.60);
  box-shadow:
    inset 0 1px 0 rgba(200,160,255,0.22),
    inset 0 -1px 0 rgba(0,0,0,0.50),
    0 3px 14px rgba(80,20,180,0.50),
    0 0 20px rgba(140,80,255,0.22);
  color: white;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.btn--primary:hover { filter: brightness(1.10); box-shadow: inset 0 1px 0 rgba(200,160,255,0.25), inset 0 -1px 0 rgba(0,0,0,0.50), 0 4px 18px rgba(80,20,180,0.60), 0 0 26px rgba(140,80,255,0.30); }

/* gold → lavender */
.btn--secondary {
  background-color: var(--secondary-b);
  background-image:
    linear-gradient(180deg,
      rgba(255,255,255,0.22)  0%,
      rgba(255,255,255,0.07) 49%,
      transparent            50%,
      rgba(0,0,0,0.10)       100%
    ),
    linear-gradient(180deg, var(--secondary-t) 0%, var(--secondary-b) 100%);
  border: 1px solid rgba(40,0,100,0.55);
  box-shadow:
    inset 0 1px 0 rgba(220,180,255,0.22),
    inset 0 -1px 0 rgba(0,0,0,0.48),
    0 3px 14px rgba(100,30,200,0.42),
    0 0 18px var(--secondary-glow);
  color: white;
}

.btn--secondary:hover { filter: brightness(1.08); }

::-webkit-scrollbar-track { background: var(--bg-void); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, hsl(259,24%,26%) 0%, hsl(265,32%,12%) 100%);
  border-color: var(--border-lo);
}

.tab--active,
.tab[aria-selected="true"] {
  background-color: var(--blue-b);
  background-image:
    linear-gradient(180deg,
      rgba(255,255,255,0.20)  0%,
      rgba(255,255,255,0.06) 49%,
      transparent            50%,
      rgba(0,0,0,0.08)       100%
    ),
    linear-gradient(180deg, var(--blue-t) 0%, var(--blue-b) 100%);
  color: white;
  border-color: rgba(30,0,90,0.55);
  box-shadow:
    inset 0 1px 0 rgba(200,160,255,0.18),
    inset 0 -1px 0 rgba(0,0,0,0.45),
    0 2px 12px rgba(80,20,180,0.45),
    0 0 14px rgba(140,80,255,0.18);
  letter-spacing: 0.02em;
}

.tab--active::after,
.tab[aria-selected="true"]::after { display: none; }

.list-item--active {
  background-color: var(--blue-b);
  background-image:
    linear-gradient(180deg,
      rgba(255,255,255,0.18) 0%,
      rgba(255,255,255,0.06) 49%,
      transparent 50%,
      rgba(0,0,0,0.08) 100%
    ),
    linear-gradient(180deg, var(--blue-t) 0%, var(--blue-b) 100%);
  color: white;
  border-color: rgba(30,0,90,0.52);
  box-shadow: inset 0 1px 0 rgba(200,160,255,0.15), 0 2px 10px rgba(80,20,180,0.42), 0 0 12px rgba(140,80,255,0.15);
}

input[type="checkbox"]:checked + .checkbox-box {
  background-color: var(--blue-b);
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.20) 0%, rgba(255,255,255,0.06) 49%, transparent 50%, rgba(0,0,0,0.08) 100%),
    linear-gradient(180deg, var(--blue-t) 0%, var(--blue-b) 100%);
  border-color: rgba(30,0,90,0.55);
  box-shadow: inset 0 1px 0 rgba(200,160,255,0.18), 0 1px 4px rgba(80,20,180,0.40), 0 0 8px rgba(140,80,255,0.18);
}

input[type="radio"]:checked + .radio-dot {
  background-color: var(--blue-b);
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.20) 0%, rgba(255,255,255,0.06) 49%, transparent 50%),
    linear-gradient(180deg, var(--blue-t) 0%, var(--blue-b) 100%);
  border-color: rgba(30,0,90,0.55);
  box-shadow: inset 0 1px 0 rgba(200,160,255,0.18), 0 1px 4px rgba(80,20,180,0.40);
}

input:checked ~ .toggle-track {
  background-color: var(--blue-b);
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.18) 0%, rgba(255,255,255,0.06) 49%, transparent 50%, rgba(0,0,0,0.08) 100%),
    linear-gradient(180deg, var(--blue-t) 0%, var(--blue-b) 100%);
  border-color: rgba(30,0,90,0.52);
  box-shadow: 0 0 10px rgba(140,80,255,0.22);
}

mark { background: rgba(140,80,255,0.24); color: hsl(280,90%,82%); }

blockquote {
  border-left-color: var(--blue-b);
  background: linear-gradient(90deg, rgba(120,60,220,0.10) 0%, transparent 100%);
}

.progress__fill {
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.22) 0%, rgba(255,255,255,0.06) 49%, transparent 50%, rgba(255,255,255,0.04) 100%),
    linear-gradient(90deg, var(--blue-b), var(--blue-t));
  box-shadow: 0 0 8px rgba(140,80,255,0.45);
}