/* ============================================================
   OmniBoard PROJECT — base.css
   CSS Reset + Typography + Layout Helpers + Components
   ============================================================ */

/* ─── Google Fonts ──────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ─── Reset ─────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans, 'Inter', system-ui, sans-serif);
  background: var(--bg, #0e0f10);
  color: var(--ink, #e8eaec);
  line-height: 1.55;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video, canvas {
  display: block;
  max-width: 100%;
}

input, button, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--trans-fast);
}

a:hover { opacity: 0.8; }

ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

p {
  color: var(--ink);
  line-height: 1.65;
}

/* ─── Typography Scale ──────────────────────────────────────── */
.text-xs   { font-size: 0.75rem;  line-height: 1.4; }
.text-sm   { font-size: 0.875rem; line-height: 1.5; }
.text-base { font-size: 1rem;     line-height: 1.55; }
.text-lg   { font-size: 1.125rem; line-height: 1.5; }
.text-xl   { font-size: 1.25rem;  line-height: 1.4; }
.text-2xl  { font-size: 1.5rem;   line-height: 1.3; }
.text-3xl  { font-size: 1.875rem; line-height: 1.2; }
.text-4xl  { font-size: 2.25rem;  line-height: 1.15; }

.font-light    { font-weight: 300; }
.font-normal   { font-weight: 400; }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }
.font-black    { font-weight: 900; }

.text-accent     { color: var(--accent); }
.text-muted      { color: var(--ink-muted); }
.text-ink        { color: var(--ink); }
.tracking-tight  { letter-spacing: -0.03em; }
.tracking-wide   { letter-spacing: 0.06em; }
.uppercase       { text-transform: uppercase; }

/* ─── Layout Helpers ────────────────────────────────────────── */
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center{ align-items: center; }
.items-start { align-items: flex-start; }
.items-end   { align-items: flex-end; }
.justify-center  { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end     { justify-content: flex-end; }
.gap-1  { gap: 4px; }
.gap-2  { gap: 8px; }
.gap-3  { gap: 12px; }
.gap-4  { gap: 16px; }
.gap-6  { gap: 24px; }
.gap-8  { gap: 32px; }
.flex-1  { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }
.overflow-hidden { overflow: hidden; }
.w-full  { width: 100%; }
.h-full  { height: 100%; }
.relative { position: relative; }
.absolute { position: absolute; }

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

.hidden { display: none !important; }

/* Spacing */
.p-1  { padding: 4px; }
.p-2  { padding: 8px; }
.p-3  { padding: 12px; }
.p-4  { padding: 16px; }
.p-6  { padding: 24px; }
.px-2 { padding-left: 8px;  padding-right: 8px; }
.px-3 { padding-left: 12px; padding-right: 12px; }
.px-4 { padding-left: 16px; padding-right: 16px; }
.px-6 { padding-left: 24px; padding-right: 24px; }
.py-1 { padding-top: 4px;   padding-bottom: 4px; }
.py-2 { padding-top: 8px;   padding-bottom: 8px; }
.py-3 { padding-top: 12px;  padding-bottom: 12px; }

/* ─── Surface / Card ────────────────────────────────────────── */
.surface {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.surface2 {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

/* ─── Divider ────────────────────────────────────────────────── */
.divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  border: none;
}

/* ─── Accent glow helper ─────────────────────────────────────── */
.glow {
  box-shadow: var(--accent-glow);
}

/* ============================================================
   COMPONENTS
   ============================================================ */

/* ─── Buttons ───────────────────────────────────────────────── */
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-md);
  padding: 9px 18px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition:
    filter var(--trans-base),
    transform var(--trans-fast),
    box-shadow var(--trans-base),
    opacity var(--trans-base);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-ink);
  border: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: var(--accent-glow), 0 6px 20px rgba(0,0,0,0.35);
}

.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

.btn-ghost {
  background: transparent;
  color: var(--btn-ghost-ink);
  border: 1px solid var(--btn-ghost-border);
}

.btn-ghost:hover {
  background: var(--accent-muted);
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn-ghost:active {
  transform: translateY(0);
}

/* Button sizes */
.btn-sm {
  padding: 5px 12px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 12px 28px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
}

/* ─── Header ────────────────────────────────────────────────── */
.omniboard-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header, 40);
  width: 100%;
  height: 56px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* ─── Brand ─────────────────────────────────────────────────── */
.omniboard-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.omniboard-brand__mark {
  width: 32px;
  height: 32px;
  background: var(--btn-primary-bg);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 900;
  color: var(--btn-primary-ink);
  letter-spacing: -0.04em;
  box-shadow: var(--accent-glow);
  transition: box-shadow var(--trans-base), transform var(--trans-spring);
}

.omniboard-brand:hover .omniboard-brand__mark {
  transform: scale(1.06);
  box-shadow: var(--accent-glow), 0 0 0 3px var(--accent-muted);
}

.omniboard-brand__name {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1;
}

.omniboard-brand__sub {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  line-height: 1;
  margin-top: 2px;
}

/* ─── Nav / Header Pills ────────────────────────────────────── */
.omniboard-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 16px;
}

.omniboard-nav__item {
  padding: 6px 14px;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-muted);
  text-decoration: none;
  transition: background var(--trans-fast), color var(--trans-fast);
}

.omniboard-nav__item:hover,
.omniboard-nav__item.is-active {
  background: var(--accent-muted);
  color: var(--accent);
}

/* ─── Theme Picker ──────────────────────────────────────────── */
.omniboard-theme-picker {
  appearance: none;
  -webkit-appearance: none;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--ink);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 5px 28px 5px 10px;
  cursor: pointer;
  outline: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='none'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23888' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  transition: border-color var(--trans-fast);
}

.omniboard-theme-picker:hover,
.omniboard-theme-picker:focus {
  border-color: var(--accent);
  box-shadow: var(--accent-glow);
}

/* ─── Rail (Vertical Tools Bar) ─────────────────────────────── */
.omniboard-rail {
  background: var(--rail-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 8px;
  gap: 4px;
  z-index: var(--z-rail, 30);
}

.omniboard-rail__btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink-muted);
  font-size: 1rem;
  cursor: pointer;
  transition:
    background var(--trans-fast),
    color var(--trans-fast),
    border-color var(--trans-fast),
    box-shadow var(--trans-fast);
}

.omniboard-rail__btn:hover,
.omniboard-rail__btn.is-active {
  background: var(--accent-muted);
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--accent-glow);
}

.omniboard-rail__sep {
  width: 24px;
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

/* ─── Side Panel ─────────────────────────────────────────────── */
.omniboard-panel {
  background: var(--panel-bg);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.omniboard-panel__header {
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.omniboard-panel__title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.omniboard-panel__body {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  overflow-y: auto;
}

/* ─── Form Controls ──────────────────────────────────────────── */
.omniboard-input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--ink);
  font-size: 0.875rem;
  padding: 8px 12px;
  outline: none;
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
}

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

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

.omniboard-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 4px;
  display: block;
}

/* ─── Badge ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-accent {
  background: var(--accent-muted);
  color: var(--accent);
  border: 1px solid var(--accent);
}

/* ─── Scrollbar ──────────────────────────────────────────────── */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

*::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 10px;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--accent-muted);
}

/* ─── Toast Notifications ────────────────────────────────────── */
#omniboard-toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: var(--z-toast, 60);
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.omniboard-toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  min-width: 240px;
  max-width: 360px;
  box-shadow: var(--shadow);
  pointer-events: all;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  animation: toastIn 0.3s var(--trans-spring) forwards;
  color: var(--ink);
  font-size: 0.875rem;
}

.omniboard-toast.is-leaving {
  animation: toastOut 0.25s ease forwards;
}

.omniboard-toast__title {
  font-weight: 600;
  margin-bottom: 2px;
  font-size: 0.875rem;
}

.omniboard-toast__body {
  color: var(--ink-muted);
  font-size: 0.8rem;
}

.omniboard-toast--success { border-left-color: #22c55e; }
.omniboard-toast--error   { border-left-color: #ef4444; }
.omniboard-toast--warning { border-left-color: #f59e0b; }
.omniboard-toast--info    { border-left-color: var(--accent); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(32px) scale(0.95); }
  to   { opacity: 1; transform: translateX(0)    scale(1); }
}

@keyframes toastOut {
  to { opacity: 0; transform: translateX(32px) scale(0.95); }
}

/* ─── Transition Utilities ───────────────────────────────────── */
.transition-all    { transition: all var(--trans-base); }
.transition-colors { transition: color var(--trans-base), background var(--trans-base), border-color var(--trans-base); }
.transition-shadow { transition: box-shadow var(--trans-base); }
.transition-transform { transition: transform var(--trans-base); }
.transition-fast   { transition-duration: 0.12s; }
.transition-slow   { transition-duration: 0.4s; }

/* ─── Skeleton / Loading ─────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface2) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.6s infinite linear;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ─── Tooltip ────────────────────────────────────────────────── */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.92);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink);
  font-size: 0.72rem;
  font-weight: 500;
  white-space: nowrap;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--trans-fast), transform var(--trans-fast);
  z-index: var(--z-tooltip, 70);
  box-shadow: var(--shadow);
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* ─── Glass Panel (for glass theme) ─────────────────────────── */
.glass-panel {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .omniboard-header { padding: 0 12px; }
  .hide-mobile { display: none !important; }
}

@media (max-width: 480px) {
  .omniboard-brand__name { display: none; }
}