/* =====================================================================
   monitor-choice — Global Stylesheet
   Dark glassmorphism theme · vanilla CSS · zero external resources
   ===================================================================== */

@import url('./css/sharpness.css');
@import url('./css/size-view.css');
@import url('./css/color-lab.css');
@import url('./css/scenarios.css');
@import url('./css/panel-guide.css');

/* ---------------------------------------------------------------------
   Design tokens
   --------------------------------------------------------------------- */
:root {
  color-scheme: dark;

  /* Backgrounds */
  --bg-base: #0b1020;
  --bg-card: rgba(255, 255, 255, 0.08);
  --bg-card-strong: rgba(255, 255, 255, 0.13);

  /* Text */
  --text-primary: #f5f7fb;
  --text-muted: #aab3c5;

  /* Borders & accents */
  --border: rgba(255, 255, 255, 0.14);
  --accent-blue: #8bd3ff;
  --accent-purple: #b39cff;

  /* Semantic */
  --good-green: #8ff0b2;
  --warn-yellow: #ffd37a;
  --bad-red: #ff9aa2;

  /* Typography */
  --font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
          "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Fira Code",
               "JetBrains Mono", Consolas, monospace;

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;

  /* Radius scale */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  /* Reusable shadow */
  --shadow-card: 0 20px 80px rgba(0, 0, 0, 0.25);
  --shadow-sticky: 0 12px 40px rgba(0, 0, 0, 0.35);

  /* Gradient used by active pills / accents */
  --gradient-accent: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));

  /* Glass surface */
  --glass-bg: linear-gradient(145deg, var(--bg-card), rgba(255, 255, 255, 0.04));
  --glass-bg-strong: linear-gradient(145deg, var(--bg-card-strong), rgba(255, 255, 255, 0.06));
}

/* ---------------------------------------------------------------------
   Reset & base
   --------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background:
    radial-gradient(circle at 20% 0%, rgba(139, 211, 255, 0.24), transparent 30%),
    radial-gradient(circle at 80% 10%, rgba(179, 156, 255, 0.22), transparent 34%),
    var(--bg-base);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
}

p {
  margin: 0;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-purple);
}

button {
  font-family: inherit;
}

/* ---------------------------------------------------------------------
   Page shell
   --------------------------------------------------------------------- */
.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
}

/* ---------------------------------------------------------------------
   App header
   --------------------------------------------------------------------- */
.app-header {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.app-header .logo {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--gradient-accent);
  display: grid;
  place-items: center;
  font-size: 28px;
  box-shadow: 0 10px 30px rgba(139, 211, 255, 0.3);
}

.app-header .header-text {
  flex: 1;
  min-width: 0;
}

.app-header h1 {
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 800;
}

.app-header .subtitle {
  margin-top: var(--space-sm);
  max-width: 720px;
  color: var(--text-muted);
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.7;
}

/* ---------------------------------------------------------------------
   Reusable glass card utility (used across tabs)
   --------------------------------------------------------------------- */
.glass-card {
  border: 1px solid var(--border);
  background: var(--glass-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

/* ---------------------------------------------------------------------
   Input panel (sticky, always visible)
   --------------------------------------------------------------------- */
.input-panel {
  position: sticky;
  top: 0;
  z-index: 50;
  border: 1px solid var(--border);
  background: var(--glass-bg-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sticky);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-lg);
  margin-bottom: var(--space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.input-panel .input-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1.3fr 1fr auto;
  gap: var(--space-md);
  align-items: end;
}

.input-panel .input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.input-panel label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
}

.input-panel label .value-display {
  color: var(--text-primary);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.input-panel input[type="range"] {
  width: 100%;
  height: 6px;
  accent-color: var(--accent-blue);
  cursor: grab;
  border-radius: var(--radius-pill);
}

.input-panel input[type="range"]:active {
  cursor: grabbing;
}

.input-panel select {
  width: 100%;
  height: 34px;
  padding: 0 var(--space-md);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  background-color: rgba(11, 16, 32, 0.9);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--accent-blue) 50%),
                    linear-gradient(135deg, var(--accent-blue) 50%, transparent 50%);
  background-position: calc(100% - 18px) center, calc(100% - 13px) center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.input-panel select:hover {
  border-color: var(--accent-blue);
  background-color: rgba(139, 211, 255, 0.06);
}

.input-panel select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(139, 211, 255, 0.15);
}

.input-panel select option {
  background-color: #0b1020;
  color: var(--text-primary);
  padding: var(--space-sm);
}

/* Collapsible "more parameters" section */
.input-panel .more-params {
  display: none;
  flex-direction: row;
  gap: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}

.input-panel .more-params.expanded {
  display: flex;
}

.input-panel .more-params .input-group {
  flex: 1;
}

.input-panel .more-params-toggle {
  align-self: end;
  height: 34px;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  padding: 0 var(--space-md);
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.input-panel .more-params-toggle:hover {
  color: var(--text-primary);
  border-color: var(--accent-blue);
  background: rgba(139, 211, 255, 0.08);
}

/* Settings buttons row */
.input-panel .settings-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-top: 1px solid var(--border);
}

.input-panel .settings-btn {
  padding: var(--space-xs) var(--space-md);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.input-panel .settings-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-blue);
}

.input-panel .settings-btn:active {
  transform: scale(0.97);
}

.input-panel .settings-btn.danger {
  color: var(--bad-red);
  border-color: rgba(255, 154, 162, 0.3);
}

.input-panel .settings-btn.danger:hover {
  background: rgba(255, 154, 162, 0.1);
  border-color: var(--bad-red);
}

.input-panel .storage-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: var(--space-sm);
}

/* ---------------------------------------------------------------------
   Tab navigation
   --------------------------------------------------------------------- */
.tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border);
}

.tab-nav-btn {
  padding: var(--space-sm) var(--space-lg);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease,
              border-color 0.18s ease, transform 0.1s ease;
  white-space: nowrap;
}

.tab-nav-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.tab-nav-btn.active {
  color: #07111f;
  background: var(--gradient-accent);
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(139, 211, 255, 0.25);
}

.tab-nav-btn.active:hover {
  color: #07111f;
  background: var(--gradient-accent);
}

/* ---------------------------------------------------------------------
   Tab content
   --------------------------------------------------------------------- */
.tab-content {
  display: none;
  animation: tab-fade-in 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes tab-fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------- */
.page-footer {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.8;
}

.privacy-notice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  font-style: italic;
  color: var(--text-muted);
}

.privacy-notice .lock {
  flex-shrink: 0;
  font-style: normal;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: 13px;
}

.footer-meta a {
  color: var(--text-muted);
  font-size: 13px;
}

.footer-meta a:hover {
  color: var(--accent-blue);
}

.footer-sep {
  color: var(--border);
}

/* ---------------------------------------------------------------------
   Tooltip system (pure CSS, no JS)
   --------------------------------------------------------------------- */
[data-tooltip] {
  position: relative;
  cursor: help;
  border-bottom: 1px dashed var(--text-muted);
  text-underline-offset: 3px;
}

[data-tooltip]::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  min-width: 200px;
  max-width: 320px;
  padding: 10px 14px;
  background: #0e1526;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.6;
  text-align: left;
  white-space: normal;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 100;
}

[data-tooltip]:hover::before {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

[data-tooltip]::after {
  content: '';
  position: absolute;
  bottom: calc(100% + 3px);
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: #0e1526;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 100;
}

[data-tooltip]:hover::after {
  opacity: 1;
}

/* ---------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------- */
@media (max-width: 920px) {
  .page {
    padding: var(--space-lg) var(--space-md) var(--space-xl);
  }

  .input-panel {
    padding: var(--space-sm) var(--space-md);
  }

  .input-panel .input-row {
    grid-template-columns: 1fr 1fr;
  }

  .input-panel .input-row .more-params-toggle {
    grid-column: 1 / -1;
  }

  .input-panel .more-params {
    flex-direction: column;
  }

  .tab-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    padding-bottom: var(--space-sm);
  }

  .tab-nav::-webkit-scrollbar {
    height: 4px;
  }

  .tab-nav-btn {
    flex-shrink: 0;
  }

  .app-header {
    gap: var(--space-md);
  }

  .app-header .logo {
    width: 44px;
    height: 44px;
    font-size: 22px;
  }
}

@media (max-width: 560px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .input-panel {
    padding: var(--space-md);
  }
}