/* ======================================================
   Ganit Technology — Main Layout CSS
   Premium Navy × Cyan Design System
   ====================================================== */

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

:root {
  --sidebar-w:     260px;
  --header-h:      60px;
  --font-ui:       'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', 'Courier New', monospace;
  --radius-xs:     4px;
  --radius:        10px;
  --radius-lg:     16px;
  --radius-xl:     24px;
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
  --shadow:        0 4px 24px rgba(0,0,0,0.5);
  --shadow-glow:   0 0 24px rgba(0,196,232,0.2), 0 4px 24px rgba(0,0,0,0.5);
  --t:             0.15s ease;
  --t-med:         0.25s ease;
}

html { height: 100%; font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-ui);
  background: var(--color-bg, #071027);
  color: var(--color-text, #E8F4F8);
  height: 100%; overflow: hidden;
  background-image:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(0,196,232,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 110%, rgba(0,131,176,0.05) 0%, transparent 60%);
  background-attachment: fixed;
}
a { color: var(--color-primary); text-decoration: none; transition: color var(--t); }
a:hover { color: var(--color-accent); }
input, select, textarea, button { font-family: inherit; }
button { cursor: pointer; }

/* ====================================================
   SPLASH
   ==================================================== */
.splash {
  position: fixed; inset: 0; z-index: 2000;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--color-bg, #071027); gap: 0;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
.splash.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.splash-logo-wrap {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 36px;
}
.splash-logo-img {
  width: 148px; height: 148px; border-radius: 28px; object-fit: contain;
  animation: splashPulse 2.2s ease-in-out infinite;
  filter: drop-shadow(0 0 32px rgba(0,196,232,0.55));
}
@keyframes splashPulse {
  0%,100% { filter: drop-shadow(0 0 20px rgba(0,196,232,0.4)); transform: scale(1); }
  50%      { filter: drop-shadow(0 0 44px rgba(0,196,232,0.7)); transform: scale(1.04); }
}
.splash-ring {
  position: absolute; inset: -18px;
  border: 1.5px solid rgba(0,196,232,0.25); border-radius: 50%;
  animation: ring1 3s linear infinite;
}
.splash-ring-2 {
  position: absolute; inset: -34px;
  border: 1px solid rgba(0,196,232,0.1); border-radius: 50%;
  animation: ring1 4.5s linear infinite reverse;
}
@keyframes ring1 {
  from { transform: rotate(0deg); } to { transform: rotate(360deg); }
}

.splash-text { text-align: center; }
.splash-title {
  font-size: 2.4rem; font-weight: 800; letter-spacing: -0.03em;
  color: var(--color-text, #E8F4F8); margin-bottom: 5px;
}
.splash-title span { color: var(--color-primary, #00C4E8); }
.splash-sub { font-size: 0.9375rem; color: var(--color-text-muted, #7BA8C4); margin-bottom: 3px; }
.splash-by  { font-size: 0.78rem; color: rgba(123,168,196,0.5); letter-spacing: 0.04em; text-transform: uppercase; }
.splash-progress {
  margin-top: 44px; width: 180px; height: 2px;
  background: rgba(0,196,232,0.1); border-radius: 1px; overflow: hidden;
}
.splash-progress-bar {
  height: 100%; background: linear-gradient(90deg, #00C4E8, #4DD9F5);
  animation: loadBar 1.3s ease-in-out forwards;
}
@keyframes loadBar { from { width: 0%; } to { width: 100%; } }

/* ====================================================
   APP SHELL
   ==================================================== */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--header-h) 1fr auto;
  height: 100vh;
  transition: grid-template-columns var(--t-med);
}
.app.hidden { display: none; }
.app.sidebar-collapsed { grid-template-columns: 64px 1fr; }

/* ====================================================
   HEADER
   ==================================================== */
.ganit-header {
  grid-column: 1 / -1;
  display: flex; align-items: center;
  height: var(--header-h);
  background: rgba(13,27,62,0.97);
  border-bottom: 1px solid var(--color-border, rgba(0,196,232,0.18));
  backdrop-filter: blur(20px);
  z-index: 200; position: relative;
}
.ganit-header::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(0,196,232,0.4) 30%, rgba(0,196,232,0.4) 70%, transparent 100%);
}

.header-logo-zone {
  width: var(--sidebar-w); flex-shrink: 0;
  display: flex; align-items: center; gap: 11px; padding: 0 18px;
  border-right: 1px solid var(--color-border, rgba(0,196,232,0.18));
  height: 100%; text-decoration: none;
  transition: background var(--t);
}
.header-logo-zone:hover { background: rgba(0,196,232,0.04); text-decoration: none; }
.app.sidebar-collapsed .header-logo-zone { width: 64px; padding: 0 16px; justify-content: center; }
.app.sidebar-collapsed .header-logo-text { display: none; }

.header-logo-img {
  height: 38px; width: 38px; border-radius: 9px; object-fit: contain; flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(0,196,232,0.35));
}
.header-logo-name { display: block; font-size: 1rem; font-weight: 800; letter-spacing: -0.01em; color: var(--color-text); }
.header-logo-sub  { display: block; font-size: 0.67rem; color: var(--color-primary); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }

.header-toolbar { flex: 1; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; }

/* Search bar in header */
.header-search {
  display: flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--color-border);
  border-radius: 40px; padding: 8px 16px; cursor: pointer;
  color: var(--color-text-muted); font-size: 0.875rem;
  transition: all var(--t); min-width: 220px; max-width: 380px;
}
.header-search:hover { border-color: var(--color-primary); background: rgba(0,196,232,0.05); color: var(--color-primary); }
.header-search-text { flex: 1; }
.header-search-kbd { display: flex; gap: 3px; }
.header-search-kbd kbd { background: rgba(255,255,255,0.07); border: 1px solid var(--color-border); border-radius: 4px; padding: 1px 5px; font-size: 0.68rem; font-family: var(--font-ui); }

.header-right { display: flex; align-items: center; gap: 6px; }
.header-action-btn {
  display: flex; align-items: center; gap: 6px;
  background: none; border: 1px solid var(--color-border); border-radius: 8px;
  color: var(--color-text-muted); padding: 7px 12px; font-size: 0.8125rem; font-weight: 500;
  transition: all var(--t);
}
.header-action-btn:hover { background: rgba(0,196,232,0.08); border-color: var(--color-primary); color: var(--color-primary); }
.header-icon-btn {
  width: 36px; height: 36px; border-radius: 8px;
  background: none; border: 1px solid var(--color-border);
  color: var(--color-text-muted); font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--t);
}
.header-icon-btn:hover { background: rgba(0,196,232,0.08); border-color: var(--color-primary); color: var(--color-primary); }

/* ====================================================
   SIDEBAR
   ==================================================== */
#sidebar-container { grid-row: 2 / 4; overflow: hidden; }
.ganit-sidebar {
  width: var(--sidebar-w); height: 100%;
  background: rgba(13,27,62,0.97);
  border-right: 1px solid var(--color-border, rgba(0,196,232,0.18));
  display: flex; flex-direction: column; overflow: hidden;
  transition: width var(--t-med);
  backdrop-filter: blur(20px);
}
.app.sidebar-collapsed .ganit-sidebar { width: 64px; }

.sidebar-search { padding: 10px 12px; flex-shrink: 0; }
.sidebar-search-wrap { position: relative; }
.sidebar-search-input {
  width: 100%; padding: 8px 12px 8px 34px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--color-border);
  border-radius: 8px; color: var(--color-text); font-size: 0.8125rem;
}
.sidebar-search-input::placeholder { color: var(--color-text-muted); }
.sidebar-search-input:focus { outline: none; border-color: var(--color-primary); }
.sidebar-search-icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--color-text-muted); font-size: 0.875rem; pointer-events: none; }

.sidebar-nav { flex: 1; overflow-y: auto; padding: 4px 8px 12px; }
.sidebar-nav::-webkit-scrollbar { width: 3px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(0,196,232,0.15); border-radius: 2px; }

.sidebar-category { margin-bottom: 1px; }
.sidebar-cat-btn {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 7px 10px; background: none; border: none; border-radius: 8px;
  color: var(--color-text-muted); font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; transition: all var(--t); text-align: left;
}
.sidebar-cat-btn:hover { background: rgba(0,196,232,0.06); color: var(--color-text); }
.cat-icon   { font-size: 0.85rem; width: 18px; text-align: center; flex-shrink: 0; }
.cat-label  { flex: 1; }
.cat-chevron { font-size: 0.6rem; transition: transform var(--t); opacity: 0.45; }
.sidebar-cat-btn[aria-expanded="false"] .cat-chevron { transform: rotate(-90deg); }

.sidebar-tool-list { list-style: none; padding: 1px 0 4px; overflow: hidden; max-height: 800px; transition: max-height 0.2s ease; }
.sidebar-cat-btn[aria-expanded="false"] + .sidebar-tool-list { max-height: 0; }
.sidebar-tool-link {
  display: flex; align-items: center; padding: 6px 10px 6px 36px;
  color: var(--color-text-muted); font-size: 0.8125rem; border-radius: 7px;
  text-decoration: none; transition: all var(--t);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; position: relative;
}
.sidebar-tool-link:hover { background: rgba(0,196,232,0.07); color: var(--color-text); text-decoration: none; }
.sidebar-tool-link.active { background: rgba(0,196,232,0.12); color: var(--color-primary); font-weight: 600; }
.sidebar-tool-link.active::before { content: ''; position: absolute; left: 0; top: 22%; bottom: 22%; width: 2px; background: var(--color-primary); border-radius: 1px; }

.sidebar-footer { display: flex; align-items: center; justify-content: center; padding: 10px 14px; border-top: 1px solid var(--color-border); flex-shrink: 0; }
.sidebar-footer-logo { height: 24px; width: auto; opacity: 0.4; transition: opacity var(--t); }
.sidebar-footer-logo:hover { opacity: 0.8; }
.sidebar-footer-links { display: flex; gap: 12px; }
.sidebar-footer-link { font-size: 0.72rem; color: var(--color-text-muted); }

/* Collapsed sidebar */
.app.sidebar-collapsed .cat-label, .app.sidebar-collapsed .cat-chevron,
.app.sidebar-collapsed .sidebar-search, .app.sidebar-collapsed .sidebar-footer-links,
.app.sidebar-collapsed .sidebar-footer-link { display: none; }
.app.sidebar-collapsed .sidebar-cat-btn { justify-content: center; padding: 8px; }
.app.sidebar-collapsed .sidebar-tool-link { padding: 8px; justify-content: center; }
.app.sidebar-collapsed .sidebar-tool-list { max-height: 0 !important; overflow: hidden; }

/* ====================================================
   MAIN
   ==================================================== */
.ganit-main { display: flex; flex-direction: column; overflow: hidden; }
#main-content { flex: 1; overflow-y: auto; padding: 24px 28px; scroll-behavior: smooth; }
#main-content::-webkit-scrollbar { width: 5px; }
#main-content::-webkit-scrollbar-track { background: transparent; }
#main-content::-webkit-scrollbar-thumb { background: rgba(0,196,232,0.18); border-radius: 3px; }
#main-content::-webkit-scrollbar-thumb:hover { background: rgba(0,196,232,0.32); }

/* ====================================================
   LOADING
   ==================================================== */
.loading { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 300px; gap: 16px; color: var(--color-text-muted); }
.loading-ring { width: 44px; height: 44px; border-radius: 50%; border: 3px solid rgba(0,196,232,0.12); border-top-color: var(--color-primary); animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ====================================================
   CALCULATOR DISPLAY
   ==================================================== */
.calc-display {
  background: rgba(7,16,39,0.85); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 16px 20px 14px;
  margin-bottom: 12px; min-height: 100px; position: relative; overflow: hidden;
}
.calc-display::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,196,232,0.35), transparent);
}
.calc-expression { font-size: 0.8125rem; color: var(--color-text-muted); font-family: var(--font-mono); min-height: 1.3em; word-break: break-all; line-height: 1.5; }
.calc-result { font-size: 2.5rem; font-weight: 700; text-align: right; font-family: var(--font-mono); color: var(--color-text); word-break: break-all; overflow-wrap: anywhere; line-height: 1.2; margin-top: 4px; }
.calc-result.has-result { color: var(--color-primary); }
.calc-result.error { color: var(--color-error); font-size: 1.2rem; }

/* ====================================================
   BUTTONS
   ==================================================== */
.calc-buttons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.calc-sci-buttons { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.eng-buttons { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }

.btn {
  padding: 0; height: 52px; border-radius: var(--radius);
  border: 1px solid rgba(0,196,232,0.1);
  background: var(--calc-btn-bg, rgba(13,27,62,0.9));
  color: var(--color-text); font-size: 1rem; font-weight: 500;
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
  transition: all var(--t); user-select: none; touch-action: manipulation;
  cursor: pointer; white-space: nowrap; position: relative; overflow: hidden;
}
.btn:hover  { border-color: rgba(0,196,232,0.3); background: var(--calc-btn-hover, rgba(20,34,84,0.95)); }
.btn:active { transform: scale(0.95); }
.btn-num { background: var(--calc-btn-num, rgba(20,34,84,0.7)); border-color: rgba(0,196,232,0.08); font-size: 1.1rem; font-weight: 600; }
.btn-num:hover { background: rgba(20,34,84,0.95); border-color: rgba(0,196,232,0.25); }
.btn-op { background: var(--calc-btn-op, rgba(0,196,232,0.12)); border-color: rgba(0,196,232,0.2); color: var(--color-primary); font-size: 1.2rem; }
.btn-op:hover { background: rgba(0,196,232,0.2); border-color: rgba(0,196,232,0.4); }
.btn-op-main { background: var(--calc-btn-op-main, rgba(0,196,232,0.22)); border-color: rgba(0,196,232,0.3); color: var(--color-primary); }
.btn-equals {
  background: var(--color-primary, #00C4E8); border-color: transparent;
  color: var(--color-primary-fg, #071027); font-weight: 800; font-size: 1.2rem;
  box-shadow: 0 4px 16px rgba(0,196,232,0.3);
}
.btn-equals:hover { background: var(--color-accent, #4DD9F5); box-shadow: 0 4px 24px rgba(0,196,232,0.5); transform: translateY(-1px); }
.btn-equals:active { transform: scale(0.95) translateY(0); }
.btn-clear { background: var(--calc-btn-clear, rgba(255,107,107,0.15)); border-color: rgba(255,107,107,0.2); color: var(--color-error, #FF6B6B); font-weight: 600; }
.btn-clear:hover { background: rgba(255,107,107,0.25); border-color: rgba(255,107,107,0.4); }
.btn-fn { background: rgba(0,131,176,0.1); border-color: rgba(0,196,232,0.1); color: var(--color-accent); font-size: 0.8125rem; height: 44px; }
.btn-fn:hover { background: rgba(0,131,176,0.2); }
.btn-bitwise { font-size: 0.75rem; color: var(--color-secondary); height: 44px; }
.btn-hex { color: var(--color-accent); }
.btn-span-2 { grid-column: span 2; }
.btn-zero { grid-column: span 2; }
.btn-sm { height: 32px; padding: 0 10px; font-size: 0.8rem; }
.btn-icon { width: 34px; height: 34px; border-radius: 50%; padding: 0; }
.btn-danger { background: rgba(255,107,107,0.12); color: var(--color-error); border-color: rgba(255,107,107,0.3); }
.btn-danger:hover { background: rgba(255,107,107,0.22); }
.btn-primary { background: var(--color-primary); color: var(--color-primary-fg); border-color: transparent; font-weight: 700; height: 44px; padding: 0 20px; border-radius: var(--radius); box-shadow: 0 4px 14px rgba(0,196,232,0.25); }
.btn-primary:hover { opacity: 0.9; box-shadow: 0 4px 20px rgba(0,196,232,0.4); transform: translateY(-1px); }
.btn-outline { background: none; border: 1px solid var(--color-border); color: var(--color-text-muted); height: 44px; padding: 0 16px; border-radius: var(--radius); font-size: 0.875rem; }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); background: rgba(0,196,232,0.05); }
.btn:disabled { opacity: 0.3; cursor: not-allowed; transform: none !important; }

/* ====================================================
   MEMORY BAR
   ==================================================== */
.calc-memory-bar { display: flex; gap: 5px; margin-bottom: 8px; align-items: center; padding: 0 2px; }
.mem-btn { background: rgba(0,196,232,0.06); border: 1px solid rgba(0,196,232,0.12); border-radius: 6px; padding: 3px 9px; font-size: 0.75rem; color: var(--color-text-muted); font-weight: 600; cursor: pointer; transition: all var(--t); }
.mem-btn:hover { background: rgba(0,196,232,0.15); color: var(--color-primary); border-color: rgba(0,196,232,0.3); }
.mem-indicator { font-size: 0.7rem; color: var(--color-primary); font-family: var(--font-mono); margin-left: auto; font-weight: 600; }

/* ====================================================
   MODE / BASE BARS
   ==================================================== */
.calc-mode-bar, .calc-base-bar { display: flex; gap: 5px; margin-bottom: 10px; }
.mode-btn, .base-btn { background: rgba(255,255,255,0.04); border: 1px solid var(--color-border); border-radius: 7px; padding: 4px 12px; font-size: 0.75rem; font-weight: 700; color: var(--color-text-muted); cursor: pointer; letter-spacing: 0.05em; transition: all var(--t); }
.mode-btn:hover, .base-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.mode-btn.active, .base-btn.active { background: rgba(0,196,232,0.15); border-color: var(--color-primary); color: var(--color-primary); box-shadow: 0 0 8px rgba(0,196,232,0.15); }

/* ====================================================
   CALC CONTAINERS
   ==================================================== */
.calc-basic, .calc-scientific { max-width: 420px; margin: 0 auto; }
.calc-engineering { max-width: 580px; margin: 0 auto; }
.calc-form { max-width: 640px; }

/* ====================================================
   FORMS
   ==================================================== */
.form-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.form-tab { background: rgba(255,255,255,0.04); border: 1px solid var(--color-border); border-radius: 8px; padding: 6px 14px; font-size: 0.8125rem; color: var(--color-text-muted); cursor: pointer; transition: all var(--t); }
.form-tab:hover { border-color: var(--color-primary); color: var(--color-text); }
.form-tab.active { background: rgba(0,196,232,0.12); border-color: var(--color-primary); color: var(--color-primary); font-weight: 600; }

.form-row { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.form-row label { min-width: 155px; font-size: 0.875rem; color: var(--color-text-muted); font-weight: 500; }
.form-row input, .form-row select, .form-row textarea { flex: 1; min-width: 140px; padding: 9px 14px; background: rgba(7,16,39,0.7); border: 1px solid var(--color-border); border-radius: var(--radius); color: var(--color-text); font-size: 0.9375rem; transition: border-color var(--t), box-shadow var(--t); }
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(0,196,232,0.1); }

/* ====================================================
   RESULTS
   ==================================================== */
.calc-output { margin-top: 20px; }
.result-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
.result-card { background: rgba(13,27,62,0.8); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 14px 16px; transition: border-color var(--t); }
.result-card:hover { border-color: rgba(0,196,232,0.3); }
.result-label { font-size: 0.7rem; color: var(--color-text-muted); margin-bottom: 5px; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
.result-value { font-size: 1.1rem; font-weight: 700; font-family: var(--font-mono); color: var(--color-text); overflow-wrap: anywhere; }
.result-hero { text-align: center; padding: 24px 20px; background: rgba(0,196,232,0.05); border: 1px solid rgba(0,196,232,0.2); border-radius: var(--radius-lg); margin-bottom: 20px; }
.result-big { font-size: 2.2rem; font-weight: 800; font-family: var(--font-mono); color: var(--color-primary); }
.result-big span { font-size: 1rem; color: var(--color-text-muted); }
.result-desc { color: var(--color-text-muted); font-size: 0.875rem; margin-top: 6px; }
.formula-box { margin-top: 14px; padding: 10px 14px; background: rgba(0,131,176,0.08); border-left: 2px solid var(--color-primary); border-radius: 0 var(--radius) var(--radius) 0; font-family: var(--font-mono); font-size: 0.875rem; color: var(--color-text-muted); }
.error-box { padding: 10px 14px; background: rgba(255,107,107,0.08); border: 1px solid rgba(255,107,107,0.3); border-radius: var(--radius); color: var(--color-error); font-size: 0.875rem; }
.error { color: var(--color-error); }

/* ====================================================
   DATA TABLES
   ==================================================== */
.table-wrap { overflow-x: auto; max-height: 420px; overflow-y: auto; border-radius: var(--radius); border: 1px solid var(--color-border); }
.table-wrap::-webkit-scrollbar { width: 4px; height: 4px; }
.table-wrap::-webkit-scrollbar-thumb { background: rgba(0,196,232,0.2); border-radius: 2px; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.8125rem; }
.data-table th { padding: 8px 12px; background: rgba(13,27,62,0.97); position: sticky; top: 0; color: var(--color-text-muted); font-weight: 700; text-align: right; border-bottom: 1px solid var(--color-border); letter-spacing: 0.03em; font-size: 0.72rem; text-transform: uppercase; }
.data-table td { padding: 7px 12px; border-bottom: 1px solid rgba(0,196,232,0.05); text-align: right; color: var(--color-text); }
.data-table td:first-child, .data-table th:first-child { text-align: left; }
.data-table tbody tr:hover { background: rgba(0,196,232,0.04); }

/* ====================================================
   GRAPH
   ==================================================== */
.calc-graph { display: grid; grid-template-columns: 260px 1fr; gap: 16px; height: calc(100vh - 148px); min-height: 380px; }
.graph-sidebar h3 { font-size: 0.72rem; color: var(--color-text-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.07em; font-weight: 700; }
.graph-fn-row { display: flex; align-items: center; gap: 6px; margin-bottom: 8px; }
.graph-fn-row input[type="text"] { flex: 1; background: rgba(7,16,39,0.7); border: 1px solid var(--color-border); border-radius: 8px; color: var(--color-text); padding: 6px 10px; font-family: var(--font-mono); font-size: 0.875rem; }
.graph-fn-row input[type="text"]:focus { outline: none; border-color: var(--color-primary); }
.graph-canvas-wrap { position: relative; overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: rgba(7,16,39,0.85); }
#graph-canvas { display: block; width: 100%; height: 100%; cursor: crosshair; }
.graph-tooltip { position: absolute; background: rgba(13,27,62,0.95); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 7px 11px; font-size: 0.8125rem; font-family: var(--font-mono); pointer-events: none; z-index: 10; box-shadow: var(--shadow-sm); max-width: 220px; backdrop-filter: blur(8px); }

/* ====================================================
   MATRIX
   ==================================================== */
.matrix-cell { width: 62px; text-align: right; padding: 6px 8px; background: rgba(7,16,39,0.7); border: 1px solid var(--color-border); border-radius: var(--radius-xs); color: var(--color-text); font-family: var(--font-mono); font-size: 0.875rem; transition: border-color var(--t); }
.matrix-cell:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(0,196,232,0.1); }

/* ====================================================
   COMMAND PALETTE
   ==================================================== */
.cmd-palette { position: fixed; inset: 0; z-index: 9999; display: none; }
.cmd-palette.open { display: block; }
.cmd-backdrop { position: absolute; inset: 0; background: rgba(7,16,39,0.8); backdrop-filter: blur(6px); }
.cmd-dialog { position: absolute; top: 14%; left: 50%; transform: translateX(-50%); width: 92%; max-width: 560px; background: rgba(13,27,62,0.99); border: 1px solid rgba(0,196,232,0.25); border-radius: var(--radius-xl); box-shadow: 0 20px 60px rgba(0,0,0,0.7), 0 0 0 1px rgba(0,196,232,0.08); overflow: hidden; backdrop-filter: blur(24px); }
.cmd-header { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--color-border); }
.cmd-logo { height: 22px; width: auto; opacity: 0.8; }
.cmd-input { flex: 1; background: none; border: none; color: var(--color-text); font-size: 1rem; outline: none; }
.cmd-input::placeholder { color: var(--color-text-muted); }
.cmd-esc { background: rgba(255,255,255,0.07); border: 1px solid var(--color-border); border-radius: 5px; padding: 2px 7px; font-size: 0.7rem; color: var(--color-text-muted); flex-shrink: 0; }
.cmd-results { max-height: 380px; overflow-y: auto; padding: 6px; }
.cmd-results::-webkit-scrollbar { width: 3px; }
.cmd-results::-webkit-scrollbar-thumb { background: rgba(0,196,232,0.2); border-radius: 2px; }
.cmd-item { display: flex; align-items: center; justify-content: space-between; padding: 10px 13px; border-radius: var(--radius); cursor: pointer; gap: 10px; }
.cmd-item.selected, .cmd-item:hover { background: rgba(0,196,232,0.1); }
.cmd-item-left { display: flex; align-items: center; gap: 10px; }
.cmd-item-label { font-size: 0.9375rem; }
.cmd-item-label mark { background: rgba(0,196,232,0.2); color: var(--color-primary); border-radius: 2px; padding: 0 2px; }
.cmd-item-cat { font-size: 0.72rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.07em; white-space: nowrap; }
.cmd-empty { padding: 24px; text-align: center; color: var(--color-text-muted); font-size: 0.875rem; }
.cmd-footer { display: flex; gap: 16px; padding: 9px 18px; border-top: 1px solid var(--color-border); font-size: 0.72rem; color: var(--color-text-muted); }

/* ====================================================
   HISTORY PANEL
   ==================================================== */
.history-panel { position: fixed; top: var(--header-h); right: 0; bottom: 0; width: 340px; background: rgba(13,27,62,0.99); border-left: 1px solid var(--color-border); z-index: 500; transform: translateX(100%); transition: transform var(--t-med); display: flex; flex-direction: column; backdrop-filter: blur(20px); }
.history-panel.open { transform: translateX(0); }
.history-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--color-border); }
.history-header h2 { font-size: 0.9375rem; font-weight: 700; }
.history-actions { display: flex; gap: 6px; }
.history-list { flex: 1; overflow-y: auto; padding: 8px; }
.history-list::-webkit-scrollbar { width: 3px; }
.history-list::-webkit-scrollbar-thumb { background: rgba(0,196,232,0.15); border-radius: 2px; }
.history-group-label { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--color-text-muted); padding: 8px 10px 4px; font-weight: 700; }
.history-item { display: flex; align-items: flex-start; gap: 4px; border-radius: var(--radius); margin-bottom: 3px; }
.history-item-inner { flex: 1; padding: 8px 10px; cursor: pointer; border-radius: var(--radius); transition: background var(--t); }
.history-item-inner:hover { background: rgba(0,196,232,0.07); }
.history-expr { font-family: var(--font-mono); font-size: 0.8125rem; color: var(--color-text); word-break: break-all; }
.history-result { font-family: var(--font-mono); font-size: 1rem; font-weight: 700; color: var(--color-primary); margin-top: 2px; }
.history-meta { font-size: 0.67rem; color: var(--color-text-muted); margin-top: 3px; }
.history-del { opacity: 0; transition: opacity var(--t); margin-top: 8px; }
.history-item:hover .history-del { opacity: 1; }
.history-empty { padding: 24px; text-align: center; color: var(--color-text-muted); font-size: 0.875rem; }

/* ====================================================
   FOOTER
   ==================================================== */
footer.ganit-footer { grid-column: 1 / -1; }

/* ====================================================
   PAGE ANIMATIONS
   ==================================================== */
.calc-basic,.calc-scientific,.calc-engineering,.calc-form,.calc-graph,
.calc-matrix,.calc-programmer,.calc-percentage,.calc-area,.calc-currency,
.about-page,.privacy-page { animation: pageIn 0.18s ease both; }
@keyframes pageIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ====================================================
   SECTION HEADERS
   ==================================================== */
.calc-title { font-size: 1.4rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 2px; }
.calc-subtitle { font-size: 0.875rem; color: var(--color-text-muted); margin-bottom: 20px; }
.calc-section-title { font-size: 0.72rem; font-weight: 800; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.09em; margin-bottom: 10px; }

/* ====================================================
   ABOUT / PRIVACY
   ==================================================== */
.about-page { max-width: 720px; }
.about-hero { text-align: center; margin-bottom: 40px; padding: 40px 20px; }
.about-logo-img { width: 100px; height: 100px; border-radius: 20px; margin: 0 auto 20px; display: block; filter: drop-shadow(0 0 24px rgba(0,196,232,0.4)); }
.about-hero h1 { font-size: 1.8rem; font-weight: 800; }
.about-tagline { color: var(--color-text-muted); margin-top: 8px; }
.version-badge { display: inline-block; background: rgba(0,196,232,0.12); color: var(--color-primary); border: 1px solid rgba(0,196,232,0.3); border-radius: 20px; padding: 3px 14px; font-size: 0.8rem; margin-top: 10px; font-weight: 600; }
.about-content section { margin-bottom: 28px; }
.about-content h2 { font-size: 1.05rem; margin-bottom: 10px; color: var(--color-primary); font-weight: 700; }
.about-content p, .about-content li { color: var(--color-text-muted); margin-bottom: 6px; line-height: 1.7; font-size: 0.9375rem; }
.about-content ul { padding-left: 20px; }
.privacy-page { max-width: 720px; }
.privacy-pledge { background: rgba(0,196,232,0.05); border: 1px solid rgba(0,196,232,0.2); border-radius: var(--radius-lg); padding: 18px 22px; margin: 18px 0; }
.privacy-page h2 { font-size: 1rem; margin: 18px 0 8px; color: var(--color-primary); font-weight: 700; }
.privacy-page ul { padding-left: 20px; }
.privacy-page li { color: var(--color-text-muted); margin-bottom: 5px; font-size: 0.9375rem; }
.error-page { text-align: center; padding: 60px 20px; }
.error-page h2 { font-size: 1.5rem; color: var(--color-error); margin-bottom: 12px; }
.error-page p { color: var(--color-text-muted); margin-bottom: 24px; }

/* ====================================================
   ADDITIONAL COMPONENT STATES
   ==================================================== */
.bit-btn { width: 28px; height: 28px; border-radius: 4px; border: 1px solid var(--color-border); background: rgba(13,27,62,0.9); font-size: 0.8rem; font-family: var(--font-mono); cursor: pointer; color: var(--color-text); transition: all var(--t); }
.bit-btn.on { background: var(--color-primary); color: var(--color-primary-fg); border-color: var(--color-primary); box-shadow: 0 0 8px rgba(0,196,232,0.3); }
.bit-grid { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 12px; }

/* ====================================================
   RESPONSIVE
   ==================================================== */
@media (max-width: 768px) {
  :root { --sidebar-w: 0px; --header-h: 54px; }
  .app { grid-template-columns: 0 1fr; }
  .header-logo-zone { width: 54px; padding: 0 12px; border-right: none; }
  .header-logo-text { display: none; }
  .header-search { min-width: 120px; }
  .ganit-sidebar { display: none; }
  .calc-graph { grid-template-columns: 1fr; height: auto; }
  .calc-percentage, .calc-area { grid-template-columns: 1fr; }
  .calc-sci-buttons { grid-template-columns: repeat(4, 1fr); }
  .eng-buttons { grid-template-columns: repeat(4, 1fr); }
  .result-grid { grid-template-columns: repeat(2, 1fr); }
  #main-content { padding: 14px 16px; }
  .btn { height: 46px; }
}
@media (max-width: 480px) {
  .calc-sci-buttons { grid-template-columns: repeat(3, 1fr); }
  .form-row label { min-width: 100%; }
  .history-panel { width: 100%; }
  .header-search { display: none; }
}

/* ====================================================
   SCROLLBAR GLOBAL
   ==================================================== */
* { scrollbar-width: thin; scrollbar-color: rgba(0,196,232,0.2) transparent; }

/* ====================================================
   PRINT
   ==================================================== */
@media print {
  .ganit-sidebar,.ganit-header,.history-panel,.cmd-palette,.splash,footer.ganit-footer { display: none !important; }
  body { background: white !important; color: black !important; }
  .app { display: block !important; height: auto !important; }
  #main-content { height: auto !important; overflow: visible !important; padding: 0 !important; }
}