/**
 * PrivAtlas – Design System
 * Comprehensive design tokens: surfaces, text, accent, semantic, hero.
 * Light and dark mode. CSS custom properties only.
 */

/* ===== Light mode (default) ===== */
:root {
  /* Surfaces */
  --color-surface:          #ffffff;
  --color-surface-alt:      #f8fafc;
  --color-surface-elevated: #ffffff;
  --color-border:           #e2e8f0;
  --color-border-subtle:    #f1f5f9;

  /* Text */
  --color-on-surface:       #0f172a;
  --color-on-surface-sec:   #475569;
  --color-muted:            #94a3b8;

  /* Brand accent – teal */
  --color-accent:           #0d9488;
  --color-accent-hover:     #0f766e;
  --color-accent-soft:      #ccfbf1;
  --color-accent-glow:      rgba(13, 148, 136, 0.12);

  /* Semantic */
  --color-warning:          #f59e0b;
  --color-danger:           #ef4444;
  --color-success:          #10b981;

  /* Hero (always dark) */
  --color-hero-bg:          #020617;
  --color-hero-surface:     #0f172a;
  --color-hero-text:        #f1f5f9;
  --color-hero-muted:       #94a3b8;
  --color-hero-accent:      #2dd4bf;
  --color-hero-glow:        rgba(45, 212, 191, 0.10);
}

/* ===== Dark mode (system preference) ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-surface:          #020617;
    --color-surface-alt:      #0f172a;
    --color-surface-elevated: #1e293b;
    --color-border:           #1e293b;
    --color-border-subtle:    #0f172a;

    --color-on-surface:       #f1f5f9;
    --color-on-surface-sec:   #cbd5e1;
    --color-muted:            #64748b;

    --color-accent:           #2dd4bf;
    --color-accent-hover:     #14b8a6;
    --color-accent-soft:      #042f2e;
    --color-accent-glow:      rgba(45, 212, 191, 0.12);
  }
}

/* ===== Manual overrides ===== */
[data-theme="dark"] {
  --color-surface:          #020617;
  --color-surface-alt:      #0f172a;
  --color-surface-elevated: #1e293b;
  --color-border:           #1e293b;
  --color-border-subtle:    #0f172a;
  --color-on-surface:       #f1f5f9;
  --color-on-surface-sec:   #cbd5e1;
  --color-muted:            #64748b;
  --color-accent:           #2dd4bf;
  --color-accent-hover:     #14b8a6;
  --color-accent-soft:      #042f2e;
  --color-accent-glow:      rgba(45, 212, 191, 0.12);
}

[data-theme="light"] {
  --color-surface:          #ffffff;
  --color-surface-alt:      #f8fafc;
  --color-surface-elevated: #ffffff;
  --color-border:           #e2e8f0;
  --color-border-subtle:    #f1f5f9;
  --color-on-surface:       #0f172a;
  --color-on-surface-sec:   #475569;
  --color-muted:            #94a3b8;
  --color-accent:           #0d9488;
  --color-accent-hover:     #0f766e;
  --color-accent-soft:      #ccfbf1;
  --color-accent-glow:      rgba(13, 148, 136, 0.12);
}

/* ===== Utility classes ===== */
.bg-surface          { background-color: var(--color-surface); }
.bg-surface-alt      { background-color: var(--color-surface-alt); }
.bg-surface-elevated { background-color: var(--color-surface-elevated); }
.bg-accent           { background-color: var(--color-accent); }
.bg-accent-soft      { background-color: var(--color-accent-soft); }
.bg-accent-glow      { background-color: var(--color-accent-glow); }

.text-on-surface     { color: var(--color-on-surface); }
.text-on-surface-sec { color: var(--color-on-surface-sec); }
.text-muted          { color: var(--color-muted); }
.text-accent         { color: var(--color-accent); }

.border-theme        { border-color: var(--color-border); }
.border-subtle       { border-color: var(--color-border-subtle); }

/* Hero-specific: always dark regardless of theme */
.hero-section {
  --_bg: var(--color-hero-bg);
  --_surface: var(--color-hero-surface);
  --_text: var(--color-hero-text);
  --_muted: var(--color-hero-muted);
  --_accent: var(--color-hero-accent);
  --_glow: var(--color-hero-glow);
  background-color: var(--_bg);
  color: var(--_text);
}

/* ===== Animations ===== */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(32px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes lineGrow {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.4; }
  50%      { opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

/* Scroll reveal: hidden → visible */
.scroll-reveal {
  opacity: 0;
  transform: translateY(48px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.scroll-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.scroll-reveal-stagger > * {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.scroll-reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.scroll-reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 100ms; }
.scroll-reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 200ms; }
.scroll-reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 300ms; }
.scroll-reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 400ms; }
.scroll-reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 500ms; }

.scroll-reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Hero entrance cascade */
.hero-fade-in {
  animation: fadeUp 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-fade-in-d1 { animation-delay: 0.1s;  opacity: 0; }
.hero-fade-in-d2 { animation-delay: 0.25s; opacity: 0; }
.hero-fade-in-d3 { animation-delay: 0.4s;  opacity: 0; }
.hero-fade-in-d4 { animation-delay: 0.6s;  opacity: 0; }

/* Counter animation target */
.counter-value {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* Gradient text utility */
.text-gradient {
  background: linear-gradient(135deg, var(--color-hero-accent) 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Card hover lift */
.card-hover {
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px -8px var(--color-accent-glow);
}

/* Divider line */
.divider-accent {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

/* ===== Form inputs ===== */
.form-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-on-surface);
  font-size: 0.875rem;
  line-height: 1.5;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input::placeholder {
  color: var(--color-muted);
}

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-on-surface-sec);
  margin-bottom: 0.375rem;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  background-color: var(--color-accent);
  color: #ffffff;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.15s;
}

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

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

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  background-color: transparent;
  color: var(--color-on-surface);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}

.btn-ghost:hover {
  background-color: var(--color-surface-alt);
  border-color: var(--color-muted);
}

/* ===== Dashboard layout ===== */
.dash-sidebar {
  width: 260px;
  min-height: calc(100vh - 4rem);
  border-right: 1px solid var(--color-border);
  background-color: var(--color-surface-alt);
  padding: 1.5rem 0;
  flex-shrink: 0;
}

.dash-sidebar-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1.25rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-on-surface-sec);
  transition: color 0.15s, background-color 0.15s;
  border-left: 2px solid transparent;
}

.dash-sidebar-item:hover {
  color: var(--color-on-surface);
  background-color: var(--color-surface);
}

.dash-sidebar-item.active {
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
  border-left-color: var(--color-accent);
}

.dash-sidebar-section {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  padding: 1.25rem 1.25rem 0.5rem;
}

/* Dashboard stat cards */
.stat-card {
  padding: 1.25rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface-elevated);
  transition: border-color 0.2s;
}

.stat-card:hover {
  border-color: var(--color-accent-glow);
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-on-surface);
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-muted);
  margin-top: 0.25rem;
}

/* Page entrance animation */
.page-enter {
  animation: fadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  opacity: 0;
}