/* Number Base Converter Styles */

/* ── Base Layout ── */
html {
  background-color: #0d9488;
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: linear-gradient(135deg, #0d9488 0%, #0f766e 100%);
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ── Header ── */
.header {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--space-3) 0;
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

.header-content {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: white;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.logo-link:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.logo-text {
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.logo-dot {
  color: #fbbf24;
}

.title {
  flex: 1;
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Action Bar ── */
.action-bar {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--space-3) 0;
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

.action-bar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.action-bar .btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.action-bar .btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.3);
}

.example-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.example-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
  font-weight: var(--font-medium);
}

/* ── Page Body / Ad Layout ── */
.page-body {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas: "content";
  min-height: 0;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.main-content {
  grid-area: content;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: var(--space-4) 0;
  min-height: 0;
}

.ad-sidebar {
  display: none;
  align-self: center;
  padding: var(--space-4) 0;
}

.ad-sidebar-left { grid-area: ad-left; justify-self: center; }
.ad-sidebar-right { grid-area: ad-right; justify-self: center; }

.ad-sticky {
  position: sticky;
  top: var(--space-4);
}

.ad-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 160px;
  height: 600px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 2px dashed rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

@media (min-width: 1400px) {
  .page-body {
    grid-template-columns: 200px 1fr 200px;
    grid-template-areas: "ad-left content ad-right";
  }

  .ad-sidebar { display: block; }
}

/* ── Converter Grid ── */
.converter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
  .converter-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── Base Cards ── */
.base-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.base-card.active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}

.base-card.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.base-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.base-info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.base-badge {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  color: white;
  letter-spacing: 0.02em;
}

.base-2  { background: #0d9488; }
.base-8  { background: #f59e0b; }
.base-10 { background: #10b981; }
.base-16 { background: #3b82f6; }

.base-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.btn-copy {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  opacity: 0.5;
  transition: opacity var(--transition-base);
  line-height: 1;
}

.btn-copy:hover {
  opacity: 1;
}

.base-input-wrap {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.base-card.active .base-input-wrap {
  border-color: var(--color-primary);
}

.base-card.error .base-input-wrap {
  border-color: var(--color-error);
}

.base-prefix {
  padding: var(--space-3) 0 var(--space-3) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  font-weight: var(--font-medium);
  white-space: nowrap;
  user-select: none;
}

.base-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-text);
  outline: none;
  min-width: 0;
}

.base-input.has-prefix {
  padding-left: var(--space-1);
}

.base-input::placeholder {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
}

.base-hint {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-gray-400);
}

/* ── Bit Panel ── */
.bit-panel {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.bit-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.bit-panel-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.bit-width-tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--color-background);
  border-radius: var(--radius-md);
  padding: 3px;
}

.bit-tab {
  border: none;
  background: transparent;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.bit-tab.active {
  background: var(--color-primary);
  color: white;
}

.bit-tab:hover:not(.active) {
  color: var(--color-text);
}

.bit-display {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 2;
  overflow-x: auto;
  padding: var(--space-3);
  background: var(--color-background);
  border-radius: var(--radius-md);
  min-height: 52px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.bit-placeholder {
  color: var(--color-gray-400);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
}

.bit-group {
  display: inline-flex;
  gap: 2px;
}

.bit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 26px;
  border-radius: 3px;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  transition: background-color var(--transition-fast);
}

.bit-1 {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-primary);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.bit-0 {
  background: var(--color-gray-100);
  color: var(--color-gray-400);
  border: 1px solid var(--color-gray-200);
}

.bit-separator {
  width: 1px;
  height: 26px;
  background: var(--color-border);
  margin: 0 var(--space-1);
  align-self: center;
}

.bit-overflow-warning {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-warning);
  font-weight: var(--font-medium);
}

/* ── Two's Complement Panel ── */
.twos-panel {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-left: 4px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.twos-panel-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.twos-panel-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.twos-badge {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(139, 92, 246, 0.12);
  color: #0d9488;
}

.twos-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  .twos-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.twos-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.twos-row-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.twos-row-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text);
  word-break: break-all;
  background: var(--color-background);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
}

.twos-explanation {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ── Status Bar ── */
.status-bar {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--space-2) 0;
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

.status-content {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  font-size: var(--text-sm);
}

.status-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.status-label {
  color: rgba(255, 255, 255, 0.8);
  font-weight: var(--font-medium);
}

#status-decimal,
#status-bits,
#status-sign {
  color: white;
  font-weight: var(--font-semibold);
}

/* ── Dark Mode ── */
html[data-theme="dark"] { background-color: #0f172a; }

[data-theme="dark"] body {
  background: #0f172a;
}

[data-theme="dark"] .header {
  background: rgba(0, 0, 0, 0.3);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .action-bar {
  background: rgba(0, 0, 0, 0.2);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .base-card,
[data-theme="dark"] .bit-panel,
[data-theme="dark"] .twos-panel {
  background: rgba(15, 23, 42, 0.95);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .twos-panel {
  border-left-color: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .base-input {
  color: var(--color-gray-100);
}

[data-theme="dark"] .base-input-wrap {
  background: var(--color-gray-800);
}

[data-theme="dark"] .bit-0 {
  background: var(--color-gray-700);
  color: var(--color-gray-400);
  border-color: var(--color-gray-600);
}

[data-theme="dark"] .bit-1 {
  background: rgba(59, 130, 246, 0.2);
  border-color: rgba(59, 130, 246, 0.4);
}

[data-theme="dark"] .status-bar {
  background: rgba(0, 0, 0, 0.3);
  border-top-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .ad-placeholder {
  background: rgba(0, 0, 0, 0.2);
  border-color: rgba(255, 255, 255, 0.15);
}

/* ── Mobile ── */
@media (max-width: 480px) {
  .bit-tab {
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
  }

  .bit {
    width: 18px;
    height: 22px;
    font-size: 10px;
  }

  .action-bar-content {
    gap: var(--space-2);
  }

  .example-buttons {
    gap: var(--space-1);
  }
}

/* ── About/Related fix: allow scrolling past tool UI ─────────────────────── */
.main-content { overflow-y: auto; }

/* ── Compact header ─────────────────────────────────────────────────────── */
.header { padding: var(--space-1) 0; }
.logo-link { font-size: var(--text-sm); padding: var(--space-1) var(--space-2); }
.title { font-size: var(--text-sm); }

/* ── Mobile: natural page scroll ────────────────────────────────────────── */
@media (max-width: 767px) {
  body { height: auto; min-height: 100vh; overflow-y: auto; }
  .page-body { overflow: visible; }
  .main-content { overflow: visible !important; padding-bottom: var(--space-8); }
}

/* ── Mobile action bar fix ── */
@media (max-width: 480px) {
  .action-bar-content {
    gap: var(--space-2);
  }

  .example-buttons {
    gap: var(--space-1);
  }
}