/* Windows 11 / Fluent Design system tokens & helpers
   Works with Tailwind CDN utilities. */

:root {
  --win-bg: #f3f3f3;
  --win-bg-deep: #e8e8e8;
  --win-surface: rgba(255, 255, 255, 0.72);
  --win-surface-solid: #ffffff;
  --win-border: rgba(0, 0, 0, 0.06);
  --win-border-strong: rgba(0, 0, 0, 0.1);
  --win-text: #1a1a1a;
  --win-text-secondary: #5d5d5d;
  --win-text-tertiary: #8a8a8a;
  --win-accent: #005fb8;
  --win-accent-hover: #0067c0;
  --win-accent-pressed: #004f9a;
  --win-accent-soft: rgba(0, 95, 184, 0.1);
  --win-danger: #c42b1c;
  --win-danger-soft: rgba(196, 43, 28, 0.1);
  --win-success: #0f7b0f;
  --win-radius-sm: 4px;
  --win-radius: 8px;
  --win-radius-lg: 12px;
  --win-radius-xl: 16px;
  --win-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04), 0 0 2px rgba(0, 0, 0, 0.06);
  --win-shadow: 0 8px 16px rgba(0, 0, 0, 0.06), 0 0 2px rgba(0, 0, 0, 0.06);
  --win-shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.08), 0 0 2px rgba(0, 0, 0, 0.06);
  --win-font: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

html {
  color-scheme: light;
}

body.win11 {
  margin: 0;
  min-height: 100vh;
  font-family: var(--win-font);
  color: var(--win-text);
  background: var(--win-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Mica / acrylic style desktop wallpaper */
.win11-desktop {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(0, 120, 212, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 10%, rgba(136, 84, 208, 0.14), transparent 50%),
    radial-gradient(800px 500px at 50% 100%, rgba(0, 153, 188, 0.12), transparent 55%),
    linear-gradient(160deg, #dfe9f5 0%, #eef1f6 35%, #f3f3f3 70%, #e8eef5 100%);
}

.win11-desktop::before {
  content: "";
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.55) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.35) 0%, transparent 45%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
}

.win11-desktop > * {
  position: relative;
  z-index: 1;
}

/* Acrylic / mica card */
.win11-acrylic {
  background: var(--win-surface);
  backdrop-filter: blur(40px) saturate(1.4);
  -webkit-backdrop-filter: blur(40px) saturate(1.4);
  border: 1px solid var(--win-border-strong);
  box-shadow: var(--win-shadow-lg);
  border-radius: var(--win-radius-xl);
}

.win11-surface {
  background: var(--win-surface-solid);
  border: 1px solid var(--win-border);
  box-shadow: var(--win-shadow-sm);
  border-radius: var(--win-radius-lg);
}

/* Title bar (window chrome) */
.win11-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 32px;
  padding: 0 0 0 16px;
  user-select: none;
}

.win11-caption-buttons {
  display: flex;
  height: 100%;
}

.win11-caption-btn {
  width: 46px;
  height: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--win-text);
  background: transparent;
  border: 0;
  cursor: default;
  transition: background 0.1s ease;
}

.win11-caption-btn:hover {
  background: rgba(0, 0, 0, 0.06);
}

.win11-caption-btn.close:hover {
  background: #c42b1c;
  color: #fff;
}

/* Fluent controls */
.win11-input {
  width: 100%;
  height: 32px;
  padding: 0 12px;
  font: inherit;
  font-size: 14px;
  color: var(--win-text);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--win-border-strong);
  border-bottom: 2px solid rgba(0, 0, 0, 0.45);
  border-radius: var(--win-radius-sm);
  outline: none;
  transition: border-color 0.12s ease, background 0.12s ease, box-shadow 0.12s ease;
}

.win11-input:hover {
  background: rgba(255, 255, 255, 0.9);
}

.win11-input:focus {
  background: #fff;
  border-color: var(--win-accent);
  border-bottom-color: var(--win-accent);
  box-shadow: 0 0 0 1px rgba(0, 95, 184, 0.15);
}

.win11-input::placeholder {
  color: var(--win-text-tertiary);
}

.win11-label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--win-text-secondary);
}

.win11-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 96px;
  height: 32px;
  padding: 0 16px;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--win-radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease, transform 0.05s ease;
  text-decoration: none;
  user-select: none;
}

.win11-btn:active {
  transform: scale(0.98);
}

.win11-btn-primary {
  color: #fff;
  background: var(--win-accent);
  border-color: var(--win-accent);
}

.win11-btn-primary:hover {
  background: var(--win-accent-hover);
  border-color: var(--win-accent-hover);
}

.win11-btn-primary:active {
  background: var(--win-accent-pressed);
}

.win11-btn-secondary {
  color: var(--win-text);
  background: rgba(255, 255, 255, 0.7);
  border-color: var(--win-border-strong);
}

.win11-btn-secondary:hover {
  background: rgba(0, 0, 0, 0.04);
}

.win11-btn-subtle {
  color: var(--win-accent);
  background: transparent;
  border-color: transparent;
  min-width: auto;
  padding: 0 8px;
}

.win11-btn-subtle:hover {
  background: var(--win-accent-soft);
}

.win11-alert {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: var(--win-radius);
  font-size: 13px;
  line-height: 1.4;
}

.win11-alert-error {
  color: #5c1e1a;
  background: var(--win-danger-soft);
  border: 1px solid rgba(196, 43, 28, 0.2);
}

.win11-alert-success {
  color: #0c4a0c;
  background: rgba(15, 123, 15, 0.1);
  border: 1px solid rgba(15, 123, 15, 0.2);
}

.win11-alert-info {
  color: #003966;
  background: var(--win-accent-soft);
  border: 1px solid rgba(0, 95, 184, 0.18);
}

/* App shell */
.win11-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px 1fr;
  background: var(--win-bg);
}

.win11-nav {
  background: rgba(243, 243, 243, 0.85);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-right: 1px solid var(--win-border);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.win11-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 36px;
  padding: 0 12px;
  border-radius: var(--win-radius);
  color: var(--win-text);
  text-decoration: none;
  font-size: 14px;
  border: 1px solid transparent;
}

.win11-nav-item:hover {
  background: rgba(0, 0, 0, 0.04);
}

.win11-nav-item.active {
  background: rgba(0, 0, 0, 0.06);
  font-weight: 600;
}

.win11-nav-item.active::before {
  content: "";
  width: 3px;
  height: 16px;
  border-radius: 999px;
  background: var(--win-accent);
  margin-left: -8px;
  margin-right: 5px;
}

.win11-content {
  padding: 24px 28px 40px;
  overflow: auto;
}

.win11-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.win11-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #60cdff, #0078d4);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

.win11-check {
  width: 18px;
  height: 18px;
  accent-color: var(--win-accent);
}

@media (max-width: 900px) {
  .win11-shell {
    grid-template-columns: 1fr;
  }

  .win11-nav {
    border-right: 0;
    border-bottom: 1px solid var(--win-border);
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }
}