/* layout.css — shell, grid, navigation, responsive layout */

#lock {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--space-6);
  background: var(--bg-0);
  overflow: hidden;
  z-index: 100;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

/* Drifting aurora behind the lock card. */
#lock::before {
  content: "";
  position: absolute;
  inset: -25%;
  z-index: 0;
  background:
    radial-gradient(30rem 26rem at 22% 22%, var(--aurora-1) 0%, transparent 55%),
    radial-gradient(34rem 28rem at 80% 78%, var(--aurora-2) 0%, transparent 58%),
    radial-gradient(28rem 24rem at 60% 10%, var(--aurora-3) 0%, transparent 55%);
  filter: blur(6px);
}

@media (prefers-reduced-motion: no-preference) {
  #lock::before {
    animation: aurora-drift 26s ease-in-out infinite alternate;
  }
}

.lock-card {
  position: relative;
  z-index: 1;
}

#lock[hidden] {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.lock-card {
  width: 100%;
  max-width: 22rem;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  text-align: center;
  animation: lock-enter 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

.lock-badge {
  width: 4rem;
  height: 4rem;
  margin: 0 auto var(--space-5);
  display: grid;
  place-items: center;
  font-size: 2rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow);
}

.lock-card h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.lock-subtitle {
  color: var(--text-2);
  margin-bottom: var(--space-6);
}

.lock-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.lock-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.lock-input-wrap input {
  width: 100%;
  padding: var(--space-4) var(--space-11) var(--space-4) var(--space-4);
  border-radius: var(--radius);
  border: 1px solid var(--surface-border);
  background: var(--bg-2);
  color: var(--text-0);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.lock-input-wrap input:focus {
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

.lock-input-wrap .icon-btn {
  position: absolute;
  right: var(--space-2);
  color: var(--text-2);
}

.lock-err {
  min-height: 1.25rem;
  color: var(--danger);
  font-size: 0.875rem;
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
  isolation: isolate;
}

#app[hidden] {
  display: none !important;
}

/* Ambient aurora — a soft, slowly drifting mesh behind the whole app.
   Fixed and GPU-composited (transform/opacity only); disabled for reduced motion. */
#app::before {
  content: "";
  position: fixed;
  inset: -20% -10% -10% -10%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(38rem 30rem at 12% 8%, var(--aurora-1) 0%, transparent 60%),
    radial-gradient(42rem 34rem at 88% 18%, var(--aurora-2) 0%, transparent 62%),
    radial-gradient(46rem 36rem at 70% 96%, var(--aurora-3) 0%, transparent 60%);
  filter: blur(8px);
  will-change: transform;
}

@media (prefers-reduced-motion: no-preference) {
  #app::before {
    animation: aurora-drift 32s ease-in-out infinite alternate;
  }
}

@keyframes aurora-drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(-2%, 1.5%, 0) scale(1.06); }
  100% { transform: translate3d(2%, -1.5%, 0) scale(1.03); }
}

#topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: calc(var(--header-h) + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-left: max(var(--space-4), env(safe-area-inset-left, 0px));
  padding-right: max(var(--space-4), env(safe-area-inset-right, 0px));
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--surface-border);
}

.app-title {
  font-weight: 700;
  font-size: 1.25rem;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav {
  display: none;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-6);
}

.main-nav .nav-link {
  position: relative;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  color: var(--text-2);
  font-weight: 500;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.main-nav .nav-link:hover {
  color: var(--text-0);
  background: var(--surface-hover);
}

.main-nav .nav-link.active {
  color: var(--text-0);
}

/* Animated accent underline on the active top-nav item. */
.main-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.15rem;
  height: 2px;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: translateX(-50%);
  transition: width var(--transition) var(--ease-spring);
}

.main-nav .nav-link.active::after {
  width: calc(100% - var(--space-8));
}

.topbar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.app-body {
  display: flex;
  flex: 1;
  position: relative;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(80vw, var(--sidebar-w));
  z-index: 60;
  background: var(--bg-2);
  border-right: 1px solid var(--surface-border);
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  display: flex;
  flex-direction: column;
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--surface-border);
}

.sidebar-title {
  font-weight: 700;
  font-size: 1.125rem;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
}

.sidebar-nav .nav-link {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  color: var(--text-2);
  font-weight: 500;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link.active {
  color: var(--text-0);
  background: var(--surface-hover);
}

.scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
  z-index: 55;
}

.scrim.open {
  opacity: 1;
  visibility: visible;
}

#main {
  flex: 1;
  min-width: 0;
  padding: var(--space-4);
  padding-left: max(var(--space-4), env(safe-area-inset-left, 0px));
  padding-right: max(var(--space-4), env(safe-area-inset-right, 0px));
  padding-bottom: max(var(--space-4), env(safe-area-inset-bottom, 0px));
}

/* Small-screen tightening so cards and titles breathe on phones. */
@media (max-width: 640px) {
  #main { padding: var(--space-3); }
  .page-title { font-size: 1.3rem; margin-bottom: var(--space-4); }
  .card { padding: var(--space-4); }
  .app-title { font-size: 1.125rem; }
  /* Let control/filter bars scroll horizontally instead of squashing. */
  .chart-controls,
  .filter-bar { gap: var(--space-2); }
  .app-body { overflow-x: hidden; }
}

.view {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  animation: view-enter 300ms ease;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-6);
}

.grid {
  display: grid;
  gap: var(--space-5);
}

.grid-1 { grid-template-columns: 1fr; }

@media (min-width: 768px) {
  .grid-md-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-md-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  #menu-btn,
  #sidebar-close,
  .sidebar,
  .scrim {
    display: none;
  }

  .main-nav {
    display: flex;
  }

  .grid-lg-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-lg-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-lg-4 { grid-template-columns: repeat(4, 1fr); }
}

@keyframes lock-enter {
  from { opacity: 0; transform: translateY(1rem) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes view-enter {
  from { opacity: 0; transform: translateY(0.5rem); }
  to { opacity: 1; transform: translateY(0); }
}