/* Dark theme (default) */
:root,
[data-theme="dark"] {
  --bg: #0f0f12;
  --surface: #1a1a20;
  --surface-hover: #24242c;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --border: #27272a;
  --input-bg: #0f0f12;
  --input-border: #3f3f46;
  --radius: 12px;
  --radius-sm: 8px;
  --space: 1rem;
  --space-sm: 0.5rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
}

/* Light theme */
[data-theme="light"] {
  --bg: #f4f4f5;
  --surface: #ffffff;
  --surface-hover: #e4e4e7;
  --accent: #4f46e5;
  --accent-hover: #6366f1;
  --text: #18181b;
  --text-muted: #52525b;
  --border: #d4d4d8;
  --input-bg: #ffffff;
  --input-border: #a1a1aa;
  --radius: 12px;
  --radius-sm: 8px;
  --space: 1rem;
  --space-sm: 0.5rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 1rem 2rem;
}

/* Nav */
.app-nav {
  width: 100%;
  max-width: min(900px, 100vw - 2rem);
  padding: 0.75rem 0 1rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
}

.app-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.app-nav a:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.app-nav a.active {
  color: var(--accent);
  font-weight: 600;
}

/* Theme toggle in nav */
.app-nav .theme-toggle {
  margin-left: auto;
  font-family: inherit;
  font-size: 0.85rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.app-nav .theme-toggle:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.main-wrap {
  width: 100%;
  max-width: min(900px, 100vw - 2rem);
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

/* Unified page layout – same on every page */
.page-container {
  width: 100%;
  padding: var(--space-lg) var(--space) var(--space-xl);
}
@media (min-width: 576px) {
  .page-container {
    padding-left: var(--space-lg);
  }
}
@media (min-width: 768px) {
  .page-container {
    padding-top: var(--space-xl);
  }
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space);
  margin-bottom: var(--space-xl);
  width: 100%;
}
.page-header h1,
.page-header .page-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  letter-spacing: 0.02em;
}
.page-header .page-title {
  color: var(--text-muted);
}
.page-header--compact {
  margin-bottom: var(--space-lg);
}

/* Reusable section card */
.page-section {
  margin-bottom: var(--space-xl);
}
.page-section:last-child {
  margin-bottom: 0;
}
.page-section-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: var(--space);
  letter-spacing: 0.03em;
}
.card-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-lg);
}
.card-panel + .card-panel {
  margin-top: var(--space);
}

/* Global form accessibility – visible in both themes */
label,
.form-label {
  color: var(--text-muted) !important;
  font-size: 0.875rem;
}

input,
select,
textarea,
.form-control,
.form-select {
  background: var(--input-bg) !important;
  border: 1px solid var(--input-border) !important;
  color: var(--text) !important;
  font-size: 1rem;
}
input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.85;
}
input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

.text-muted {
  color: var(--text-muted) !important;
}

/* Buttons – theme-aware so they’re visible in both themes */
.btn,
.btn.border {
  color: var(--text) !important;
  background: var(--surface) !important;
  border-color: var(--border) !important;
}
.btn:hover {
  background: var(--surface-hover) !important;
  border-color: var(--border) !important;
}

/* Footer */
.app-footer {
  width: 100%;
  max-width: min(900px, 100vw - 2rem);
  margin-top: auto;
  padding: var(--space) 0 var(--space-sm);
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}