/* ==========================================================
   QRGen — glassmorphism dark elegant theme
   Palette: deep obsidian base + violet/cyan optical glow
   Type: Space Grotesk (single family, weight-differentiated)
   ========================================================== */

:root {
  --bg-base: #08091a;
  --bg-base-2: #0f1024;
  --violet: #8b7cff;
  --violet-dim: #6858d6;
  --cyan: #4fd8e8;
  --ink: #f1f2fb;
  --ink-dim: #9ea1c4;
  --ink-faint: #62648a;

  --glass-fill: rgba(255, 255, 255, 0.05);
  --glass-fill-strong: rgba(255, 255, 255, 0.085);
  --glass-border: rgba(255, 255, 255, 0.13);
  --glass-border-soft: rgba(255, 255, 255, 0.075);

  --radius-lg: 28px;
  --radius-md: 16px;
  --radius-sm: 10px;

  --shadow-panel: 0 40px 90px -24px rgba(0, 0, 0, 0.7);
  --focus-ring: 0 0 0 2px rgba(139, 124, 255, 0.85), 0 0 0 5px rgba(139, 124, 255, 0.18);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

/* Hilangkan highlight biru bawaan browser di semua elemen interaktif */
* {
  -webkit-tap-highlight-color: transparent;
}
button, a, input, textarea, select, [tabindex] {
  outline: none;
}
button:focus, a:focus, input:focus, textarea:focus, select:focus {
  outline: none;
}
/* Fokus custom hanya muncul untuk keyboard nav (bukan klik mouse) */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  background: var(--bg-base);
  overflow-x: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* ---------- Animasi masuk halaman (sekali, orkestrasi tunggal) ---------- */
body.preload .topbar,
body.preload .panel,
body.preload .foot {
  opacity: 0;
}

.topbar {
  animation: fadeSlideIn 0.7s var(--ease-out) 0.05s forwards;
}
.panel {
  animation: panelReveal 0.85s var(--ease-out) 0.15s forwards;
}
.foot {
  animation: fadeSlideIn 0.7s var(--ease-out) 0.5s forwards;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes panelReveal {
  from { opacity: 0; transform: translateY(24px) scale(0.985); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .topbar, .panel, .foot { animation: none !important; opacity: 1 !important; }
  .glow { animation: none !important; }
}

@media (prefers-reduced-motion: no-preference) {
  .glow { animation: drift 24s ease-in-out infinite alternate; }
  .glow-b { animation-duration: 30s; animation-delay: -6s; }
}

/* ---------- Background ---------- */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 120% 80% at 15% -10%, #191b40 0%, transparent 55%),
    linear-gradient(180deg, var(--bg-base) 0%, var(--bg-base-2) 100%);
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.32;
  will-change: transform;
}
.glow-a {
  width: 46vw;
  height: 46vw;
  background: radial-gradient(circle, var(--violet), transparent 70%);
  top: -12vw;
  right: -10vw;
}
.glow-b {
  width: 38vw;
  height: 38vw;
  background: radial-gradient(circle, var(--cyan), transparent 70%);
  bottom: -10vw;
  left: -8vw;
  opacity: 0.2;
}

@keyframes drift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-3%, 4%) scale(1.08); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.026) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 75%);
}

.noise-overlay {
  position: absolute;
  inset: 0;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* ---------- Topbar ---------- */
.topbar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px clamp(20px, 5vw, 56px) 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  box-shadow: 0 0 18px rgba(139, 124, 255, 0.55);
  display: block;
  background-size: cover;
  background-position: center;
}

.brand-name {
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand-domain {
  font-size: 0.85rem;
  color: var(--ink-faint);
}

/* ---------- Stage / layout ---------- */
.stage {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(24px, 5vh, 64px) clamp(16px, 5vw, 56px);
}

.panel {
  width: 100%;
  max-width: 980px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 0;
  background: var(--glass-fill);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(30px) saturate(150%);
  -webkit-backdrop-filter: blur(30px) saturate(150%);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.panel-left {
  padding: clamp(28px, 4vw, 48px);
  border-right: 1px solid var(--glass-border-soft);
  display: flex;
  flex-direction: column;
}

.panel-right {
  padding: clamp(28px, 4vw, 48px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  background: rgba(255, 255, 255, 0.025);
}

h1 {
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
  max-width: 22ch;
}

.lede {
  color: var(--ink-dim);
  font-size: 0.95rem;
  line-height: 1.55;
  margin: 0 0 28px;
  max-width: 38ch;
}

.field-label {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-dim);
  margin-bottom: 8px;
  font-weight: 500;
}

.glass-input, .glass-select {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--radius-md);
  color: var(--ink);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 14px 16px;
  resize: vertical;
  transition: border-color 0.2s var(--ease-out), background 0.2s var(--ease-out);
}

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

.glass-input:focus, .glass-select:focus {
  border-color: rgba(139, 124, 255, 0.5);
  background: rgba(255, 255, 255, 0.06);
}

.char-count {
  text-align: right;
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-top: 6px;
}

.options-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  margin-top: 24px;
}

/* ---------- Color trigger (pengganti input type=color) ---------- */
.color-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.2s var(--ease-out), background 0.2s var(--ease-out), transform 0.15s var(--ease-out);
}
.color-trigger:hover {
  background: rgba(255, 255, 255, 0.065);
  border-color: rgba(139, 124, 255, 0.35);
}
.color-trigger:active {
  transform: scale(0.98);
}

.color-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  flex-shrink: 0;
  transition: transform 0.2s var(--ease-out);
}
.color-trigger:hover .color-dot {
  transform: scale(1.08);
}

.color-value {
  font-size: 0.78rem;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
}

.glass-select {
  padding: 9px 12px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M6 9l6 6 6-6' stroke='%239ea1c4' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
  cursor: pointer;
}
.glass-select option {
  background: #12142c;
  color: var(--ink);
}

.status-msg {
  min-height: 1.2em;
  font-size: 0.85rem;
  color: #ff9d8a;
  margin: 18px 0 0;
  transition: color 0.2s var(--ease-out);
}
.status-msg.ok {
  color: var(--cyan);
}

/* ---------- QR preview ---------- */
.qr-frame {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 24px 60px -18px rgba(139, 124, 255, 0.45);
  overflow: hidden;
  position: relative;
}

.qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: #c7c9de;
  padding: 20px;
  text-align: center;
}
.qr-placeholder p {
  font-size: 0.82rem;
  margin: 0;
  max-width: 20ch;
  color: #a9abc9;
}

.qr-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 18px;
  animation: qrPop 0.45s var(--ease-out);
}
.qr-image.hidden {
  display: none;
}

@keyframes qrPop {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}

.qr-shine {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 40%, rgba(255,255,255,0.5) 50%, transparent 60%);
  transform: translateX(-100%);
  pointer-events: none;
}
.qr-frame.shine-play .qr-shine {
  animation: shineSweep 0.9s var(--ease-out);
}
@keyframes shineSweep {
  to { transform: translateX(100%); }
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  color: #0a0a1a;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out), opacity 0.18s var(--ease-out);
  box-shadow: 0 14px 34px -10px rgba(139, 124, 255, 0.6);
}
.btn-download:disabled {
  opacity: 0.32;
  cursor: not-allowed;
  box-shadow: none;
}
.btn-download:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px -10px rgba(139, 124, 255, 0.78);
}
.btn-download:not(:disabled):active {
  transform: translateY(0) scale(0.97);
}

/* ---------- Footer ---------- */
.foot {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 20px 16px 28px;
  font-size: 0.78rem;
  color: var(--ink-faint);
}

/* ==========================================================
   COLOR PICKER CUSTOM — Saturation/Value canvas + Hue slider
   ========================================================== */

.picker-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(4, 5, 14, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: 20px;
  opacity: 0;
  transition: opacity 0.22s var(--ease-out);
}
.picker-overlay.open {
  display: flex;
}
.picker-overlay.visible {
  opacity: 1;
}

.picker-card {
  width: 272px;
  background: rgba(20, 21, 42, 0.85);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 16px;
  backdrop-filter: blur(30px) saturate(160%);
  -webkit-backdrop-filter: blur(30px) saturate(160%);
  box-shadow: 0 40px 90px -20px rgba(0, 0, 0, 0.8);
  transform: scale(0.94) translateY(8px);
  opacity: 0;
  transition: transform 0.24s var(--ease-out), opacity 0.24s var(--ease-out);
}
.picker-overlay.visible .picker-card {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.sv-canvas {
  width: 100%;
  height: 160px;
  border-radius: var(--radius-sm);
  display: block;
  cursor: crosshair;
  touch-action: none;
}

.sv-cursor {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.4), 0 2px 6px rgba(0,0,0,0.5);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hue-row {
  position: relative;
  margin-top: 14px;
}

.hue-canvas {
  width: 100%;
  height: 14px;
  border-radius: 999px;
  display: block;
  cursor: pointer;
  touch-action: none;
}

.hue-cursor {
  position: absolute;
  top: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(0,0,0,0.25);
  box-shadow: 0 2px 6px rgba(0,0,0,0.5);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.picker-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
}

.hex-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  transition: border-color 0.2s var(--ease-out);
}
.hex-input-wrap:focus-within {
  border-color: rgba(139, 124, 255, 0.5);
}

.hex-prefix {
  color: var(--ink-faint);
  font-size: 0.85rem;
}

.hex-input {
  flex: 1;
  min-width: 0;
  background: none;
  border: none;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.picker-close {
  padding: 9px 18px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  color: #0a0a1a;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  transition: transform 0.15s var(--ease-out);
}
.picker-close:hover {
  transform: translateY(-1px);
}
.picker-close:active {
  transform: scale(0.96);
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .panel {
    grid-template-columns: 1fr;
  }
  .panel-left {
    border-right: none;
    border-bottom: 1px solid var(--glass-border-soft);
  }
  h1 {
    max-width: none;
  }
  .lede {
    max-width: none;
  }
}

@media (max-width: 560px) {
  .topbar {
    padding: 20px 18px 0;
  }
  .brand-domain {
    display: none;
  }
  .stage {
    padding: 18px 14px 32px;
  }
  .panel-left, .panel-right {
    padding: 24px 20px;
  }
  .options-row {
    grid-template-columns: 1fr 1fr;
  }
  .options-row .option:last-child {
    grid-column: 1 / -1;
  }
  .qr-frame {
    max-width: 220px;
  }
  .picker-card {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 380px) {
  .options-row {
    grid-template-columns: 1fr;
  }
}