/* ========================================================= 
   ClassPad X 2026 - Production CSS
   Layout + fx-CP400 style outer shell
   ========================================================= */

/* ---------- CSS RESET RINGAN ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

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

/* ---------- GLOBAL THEME VARIABLES ---------- */

:root {
  --cp-font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, sans-serif;

  /* Base colors */
  --cp-bg-body: #020617; /* luar device */
  --cp-bg-device: #020818;
  --cp-bg-device-inner: #050816;

  --cp-accent-blue: #18a4ff;
  --cp-accent-blue-soft: #0ea5e9;
  --cp-accent-blue-dark: #0b6ebd;

  --cp-border-soft: #1e293b;
  --cp-border-strong: #111827;

  --cp-text-primary: #e5e7eb;
  --cp-text-secondary: #94a3b8;
  --cp-text-muted: #64748b;

  --cp-surface-elevated: #020617;
  --cp-surface-deep: #020617;
  --cp-surface-card: #020617;

  --cp-key-bg: #020617;
  --cp-key-bg-alt: #020617;
  --cp-key-border: #111827;
  --cp-key-text: #e5e7eb;
  --cp-key-primary-bg: #0ea5e9;
  --cp-key-primary-bg-hover: #0284c7;
  --cp-key-primary-text: #0b1120;

  /* numeric key colors (ala ClassPad) */
  --cp-key-num-bg: #f9fafb;
  --cp-key-num-bg-top: #ffffff;
  --cp-key-num-shadow: #cbd5f5;
  --cp-key-num-text: #020617;

  --cp-header-bg: #020617;
  --cp-tabs-bg: #020617;
  --cp-display-bg: #020617;
  --cp-display-border: #111827;

  --cp-radius-large: 32px;
  --cp-radius-medium: 18px;
  --cp-radius-small: 10px;

  --cp-shadow-device: 0 26px 40px rgba(0, 0, 0, 0.8);
  --cp-shadow-inner: inset 0 0 0 1px rgba(15, 23, 42, 0.9);
  --cp-shadow-soft: 0 14px 32px rgba(15, 23, 42, 0.8);

  --cp-transition-fast: 150ms ease-out;
  --cp-transition-med: 220ms ease-out;
}

/* Mode gelap (default) dan terang */
body[data-theme="dark"],
.cp-app[data-theme="dark"] {
  --cp-bg-body: #020617;
  --cp-bg-device-inner: #050816;
  --cp-header-bg: #020617;
}

body[data-theme="light"],
.cp-app[data-theme="light"] {
  --cp-bg-body: #0f172a;
  --cp-bg-device-inner: #0b1524;
}

/* ---------- BODY LAYOUT ---------- */

body {
  min-height: 100vh;
  background: radial-gradient(circle at top, #020617 0, #020617 40%, #000 100%);
  color: var(--cp-text-primary);
  font-family: var(--cp-font-family);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  overflow-x: hidden;
}

/* =========================================================
   fx-CP400 STYLE OUTER DEVICE SHELL
   ========================================================= */

.cp-device-shell {
  width: min(410px, 100vw - 12px);
  /* tinggi mengikuti konten */
  display: flex;
  align-items: center;
  justify-content: center;
}

.cp-device-frame {
  width: 100%;
  background: radial-gradient(circle at top, #020617 0, #020617 30%, #020617 100%);
  border-radius: 40px;
  padding: 12px;
  box-shadow: var(--cp-shadow-device);
  position: relative;
}

/* Garis biru di pinggir device */
.cp-device-frame::before {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 34px;
  border: 2px solid rgba(56, 189, 248, 0.9);
  pointer-events: none;
  opacity: 0.9;
}

/* Bezel hitam di dalam frame */
.cp-device-bezel {
  position: relative;
  background:
    radial-gradient(circle at 20% 0%, rgba(15, 23, 42, 0.9), #020617 55%),
    repeating-linear-gradient(
      135deg,
      rgba(30, 64, 175, 0.25) 0,
      rgba(30, 64, 175, 0.25) 1px,
      transparent 1px,
      transparent 3px
    );
  border-radius: 30px;
  padding: 12px 12px 18px;
  box-shadow:
    inset 0 0 0 1px rgba(15, 23, 42, 0.9),
    inset 0 0 0 2px rgba(15, 23, 42, 0.55);
}

/* Branding CASIO di atas layar */
.cp-device-brand {
  text-align: center;
  padding-bottom: 4px;
}

.cp-device-brand-text {
  display: inline-block;
  font-weight: 700;
  letter-spacing: 0.35em;
  font-size: 11px;
  color: #f9fafb;
}

/* Area layar di tengah device */
.cp-device-screen {
  margin-top: 4px;
  background: radial-gradient(circle at top, #0b1120 0, #020617 45%, #000 100%);
  border-radius: 22px;
  padding: 10px;
  box-shadow:
    0 0 0 2px rgba(15, 23, 42, 0.9),
    inset 0 0 0 1px rgba(148, 163, 184, 0.15);
}

/* Bagian bawah device (model label) */
.cp-device-bottom {
  margin-top: 10px;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cp-text-muted);
  text-transform: uppercase;
}

/* =========================================================
   INTERNAL APP LAYOUT
   ========================================================= */

.cp-app {
  background: linear-gradient(180deg, #020617 0%, #020617 100%);
  border-radius: 18px;
  padding: 8px 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 520px;
}

/* HEADER (MODE, ICONS) */

.cp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  border-radius: 12px;
  background: radial-gradient(circle at top left, #020617 0, #020617 55%, #020617 100%);
  box-shadow: var(--cp-shadow-inner);
}

.cp-brand-title {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.cp-brand-subtitle {
  display: block;
  font-size: 10px;
  color: var(--cp-text-muted);
}

/* Mode indicators di tengah header */

.cp-header-mode-indicators {
  display: flex;
  gap: 4px;
  align-items: center;
  justify-content: center;
}

.cp-indicator {
  min-width: 32px;
  padding: 2px 6px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  font-size: 9px;
  text-align: center;
  background: rgba(15, 23, 42, 0.85);
  color: var(--cp-text-secondary);
}

.cp-header-right {
  display: flex;
  gap: 4px;
}

.cp-header-btn {
  border-radius: 999px;
  width: 26px;
  height: 26px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 0, #0b1120, #020617 60%);
  color: var(--cp-text-secondary);
  padding: 0;
  cursor: pointer;
  transition: background var(--cp-transition-fast), transform var(--cp-transition-fast);
}

.cp-header-btn:hover {
  background: radial-gradient(circle at 30% 0, #0f172a, #020617 65%);
  transform: translateY(-0.5px);
}

/* MAIN GRID: tabs + content */

.cp-main {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 6px;
  height: 100%;
}

/* =========================================================
   VERTICAL APP TABS (kiri)
   ========================================================= */

.cp-tabs {
  background: radial-gradient(circle at top, #020617 0, #020617 80%);
  border-radius: 16px;
  padding: 8px 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--cp-shadow-inner);
}

.cp-tab-btn {
  border: none;
  border-radius: 999px;
  padding: 6px 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: transparent;
  color: var(--cp-text-secondary);
  cursor: pointer;
  font-size: 10px;
  transition:
    background var(--cp-transition-med),
    color var(--cp-transition-med),
    transform var(--cp-transition-fast);
}

.cp-tab-btn .cp-tab-icon {
  font-size: 15px;
}

.cp-tab-btn.is-active {
  background: radial-gradient(circle at top, var(--cp-accent-blue) 0, #0369a1 55%, #0f172a 100%);
  color: #f9fafb;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.9), 0 8px 16px rgba(8, 47, 73, 0.8);
  transform: translateY(-0.5px);
}

.cp-tab-btn.is-active .cp-tab-label {
  font-weight: 600;
}

/* =========================================================
   KANVAS: DISPLAY + WORKSPACE + KEYPAD
   ========================================================= */

.cp-content {
  background: radial-gradient(circle at top left, #020617 0, #020617 60%, #020617 100%);
  border-radius: 18px;
  padding: 6px;
  display: grid;
  /* default: mode MAIN → display + workspace */
  grid-template-rows: minmax(170px, 0.95fr) minmax(150px, 1.05fr);
  gap: 6px;
  box-shadow: var(--cp-shadow-inner);
}

/* ---------- DISPLAY AREA ---------- */

.cp-display {
  border-radius: 14px;
  padding: 6px 8px;
  background: radial-gradient(circle at top, #020617 0, #020617 60%, #020617 100%);
  box-shadow:
    inset 0 0 0 1px rgba(15, 23, 42, 0.85),
    0 10px 20px rgba(15, 23, 42, 0.5);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cp-display-status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  color: var(--cp-text-muted);
}

.cp-display-status-value {
  margin-left: 4px;
  padding: 2px 6px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
}

.cp-display-status-right {
  display: flex;
  gap: 4px;
}

.cp-display-status-item {
  padding: 2px 6px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.85);
}

/* History + expression + result */

.cp-display-history {
  flex: 1;
  margin-top: 2px;
  padding: 4px 6px;
  border-radius: 10px;
  background: radial-gradient(circle at top, #020617 0, #020617 70%, #000 100%);
  color: #e5e7eb;
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 11px;
  overflow-y: auto;
  border: 1px solid rgba(15, 23, 42, 0.9);
}

.cp-display-expression-row,
.cp-display-result-row,
.cp-display-message-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 11px;
}

.cp-display-expression-label,
.cp-display-result-label {
  min-width: 42px;
  color: var(--cp-text-muted);
}

.cp-display-expression-value,
.cp-display-result-value {
  flex: 1;
  text-align: right;
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

.cp-display-result-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--cp-accent-blue-soft);
}

/* ---------- WORKSPACE ---------- */

.cp-workspace {
  position: relative;
  border-radius: 14px;
  padding: 6px 8px;
  background: radial-gradient(circle at 0 0, #020617 0, #020617 55%, #020617 100%);
  box-shadow:
    inset 0 0 0 1px rgba(15, 23, 42, 0.9),
    0 10px 24px rgba(15, 23, 42, 0.6);
  overflow: hidden;
}

.cp-workspace-view {
  display: none;
  height: 100%;
}

.cp-workspace-view.is-active {
  display: block;
}

.cp-workspace-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.cp-workspace-title {
  font-size: 12px;
  font-weight: 600;
}

.cp-workspace-text {
  font-size: 11px;
  color: var(--cp-text-secondary);
  line-height: 1.4;
}

.cp-workspace-main-info {
  border-radius: 12px;
  padding: 8px;
  border: 1px dashed rgba(148, 163, 184, 0.45);
  background: rgba(15, 23, 42, 0.65);
}

/* Workspaces khusus (graph/stat/convert dsb) */

.cp-workspace-body {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
}

.cp-workspace-body--split {
  display: grid;
  grid-template-columns: 1.1fr 1.1fr;
  gap: 6px;
}

.cp-workspace-body--scroll {
  overflow: auto;
}

/* =========================================================
   SINGLE-SCREEN LOGIC:
   Display hanya di MAIN, mode lain full workspace
   ========================================================= */

/* Class dari JS: kalau app ≠ "main" → display disembunyikan */
.cp-display--hidden {
  display: none;
}

/* Saat display disembunyikan, grid jadi 1 baris penuh (workspace saja) */
.cp-content.cp-content--no-display {
  grid-template-rows: minmax(0, 1fr);
}

/* Fallback tambahan untuk browser yang sudah support :has().
   Boleh dibiarkan untuk backup otomatis selain kontrol JS. */
.cp-content:has(.cp-workspace-view.is-active:not([data-view="main"])) {
  grid-template-rows: minmax(0, 1fr);
}

.cp-content:has(.cp-workspace-view.is-active:not([data-view="main"])) .cp-display {
  display: none;
}

/* =========================================================
   GRAPH & STAT UI (ringkas)
   ========================================================= */

.cp-input,
.cp-textarea,
.cp-select {
  width: 100%;
  border-radius: 8px;
  border: 1px solid rgba(51, 65, 85, 0.9);
  background: rgba(15, 23, 42, 0.95);
  color: var(--cp-text-primary);
  padding: 4px 6px;
  font-size: 11px;
  outline: none;
  transition: border-color var(--cp-transition-fast),
    box-shadow var(--cp-transition-fast),
    background var(--cp-transition-fast);
}

.cp-input:focus,
.cp-textarea:focus,
.cp-select:focus {
  border-color: var(--cp-accent-blue);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.7);
  background: #020617;
}

.cp-input-label {
  display: block;
  font-size: 10px;
  color: var(--cp-text-secondary);
  margin-bottom: 2px;
}

.cp-textarea {
  min-height: 80px;
  resize: vertical;
}

.cp-btn {
  border-radius: 999px;
  border: 1px solid rgba(51, 65, 85, 0.9);
  background: radial-gradient(circle at top, #0f172a 0, #020617 80%);
  color: var(--cp-text-primary);
  padding: 4px 10px;
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
  transition:
    background var(--cp-transition-med),
    border-color var(--cp-transition-med),
    transform var(--cp-transition-fast),
    box-shadow var(--cp-transition-fast);
}

.cp-btn:hover {
  background: radial-gradient(circle at top, #111827 0, #020617 85%);
  border-color: var(--cp-accent-blue-soft);
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.7);
  transform: translateY(-0.5px);
}

/* Graph canvas wrapper */

.cp-graph2d-canvas,
.cp-graph3d-canvas,
.cp-stat-graph-canvas {
  width: 100%;
  height: 140px;
  border-radius: 10px;
  background: radial-gradient(circle at top, #020617 0, #000 100%);
  border: 1px solid rgba(15, 23, 42, 0.95);
}

/* Simple table style (stat & finance & amort) */

.cp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 10px;
  color: var(--cp-text-secondary);
}

.cp-table th,
.cp-table td {
  padding: 3px 4px;
  border-bottom: 1px solid rgba(30, 41, 59, 0.9);
}

/* =========================================================
   CONVERTER UI
   ========================================================= */

.cp-workspace-body--convert {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 6px;
}

.cp-convert-sidebar {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cp-convert-tab {
  border-radius: 10px;
  border: 1px solid rgba(30, 64, 175, 0.5);
  background: radial-gradient(circle at top, #020617 0, #020617 80%);
  color: var(--cp-text-secondary);
  padding: 5px 6px;
  font-size: 10px;
  cursor: pointer;
  text-align: left;
  transition:
    background var(--cp-transition-med),
    color var(--cp-transition-med),
    transform var(--cp-transition-fast),
    box-shadow var(--cp-transition-fast);
}

.cp-convert-tab.is-active {
  background: radial-gradient(circle at top, var(--cp-accent-blue) 0, #0369a1 60%, #020617 100%);
  color: #f9fafb;
  box-shadow: 0 6px 14px rgba(8, 47, 73, 0.9);
  transform: translateY(-0.5px);
}

.cp-convert-main {
  border-radius: 12px;
  padding: 6px 8px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(30, 64, 175, 0.7);
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.9);
  overflow: auto;
}

.cp-convert-title {
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 4px;
}

.cp-convert-note {
  font-size: 10px;
  color: var(--cp-text-muted);
  margin-bottom: 4px;
}

.cp-convert-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 6px;
  margin-bottom: 6px;
}

.cp-convert-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 4px;
}

.cp-convert-result {
  font-size: 11px;
  color: var(--cp-accent-blue-soft);
  min-height: 14px;
}

/* =========================================================
   SETTINGS UI
   ========================================================= */

.cp-fieldset {
  border: 1px solid rgba(30, 64, 175, 0.7);
  border-radius: 10px;
  padding: 6px;
  margin: 0 0 6px;
}

.cp-fieldset-legend {
  padding: 0 4px;
  font-size: 11px;
  color: var(--cp-text-secondary);
}

.cp-radio-label {
  display: block;
  font-size: 10px;
  color: var(--cp-text-secondary);
  margin-bottom: 2px;
}

.cp-settings-actions {
  display: flex;
  gap: 4px;
}

/* =========================================================
   KEYPAD AREA (bawah layar) - fx-CP400 STYLE
   ========================================================= */

.cp-keypad {
  margin-top: 4px;
  border-radius: 14px;
  padding: 5px 5px 3px;
  background: radial-gradient(circle at 0 0, #020617 0, #020617 65%, #000 100%);
  box-shadow:
    inset 0 0 0 1px rgba(15, 23, 42, 0.9),
    0 12px 24px rgba(15, 23, 42, 0.9);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Keypad tabs (BASIC/TRIG/.../CONV/SET) */

.cp-keypad-tabs {
  display: flex;
  justify-content: space-between;
  gap: 3px;
}

.cp-keypad-tab {
  flex: 1 1 0;
  border-radius: 999px;
  border: 1px solid rgba(30, 64, 175, 0.7);
  background: radial-gradient(circle at top, #020617 0, #020617 80%);
  color: var(--cp-text-secondary);
  padding: 3px 0;
  font-size: 9px;
  text-align: center;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition:
    background var(--cp-transition-med),
    color var(--cp-transition-med),
    transform var(--cp-transition-fast),
    box-shadow var(--cp-transition-fast);
}

.cp-keypad-tab.is-active {
  background: radial-gradient(circle at top, var(--cp-accent-blue) 0, #0ea5e9 45%, #0369a1 100%);
  color: #0b1120;
  font-weight: 600;
  box-shadow: 0 6px 14px rgba(8, 47, 73, 0.9);
  transform: translateY(-0.5px);
}

/* Keypad pages */

.cp-keypad-page {
  display: none;
}

.cp-keypad-page.is-active {
  display: block;
}

/* Grid tombol */

.cp-keypad-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 3px;
  margin-top: 4px;
}

/* Tombol dasar (fungsi gelap) */

.cp-key {
  border-radius: 12px;
  border: 1px solid var(--cp-key-border);
  background: radial-gradient(circle at top, #111827 0, #020617 70%, #000 100%);
  color: var(--cp-key-text);
  padding: 5px 3px;
  font-size: 10px;
  line-height: 1.1;
  text-align: center;
  cursor: pointer;
  box-shadow:
    0 1px 0 rgba(15, 23, 42, 1),
    0 3px 6px rgba(15, 23, 42, 0.9);
  transition:
    transform var(--cp-transition-fast),
    box-shadow var(--cp-transition-fast),
    background var(--cp-transition-fast),
    border-color var(--cp-transition-fast);
}

.cp-key:active {
  transform: translateY(1px);
  box-shadow:
    0 0 0 rgba(15, 23, 42, 0.9),
    0 1px 3px rgba(15, 23, 42, 0.85);
}

/* Tombol utama (EXE / operator kanan) */

.cp-key--primary,
.cp-key[data-key="plus"],
.cp-key[data-key="enter"] {
  background: radial-gradient(circle at top, var(--cp-key-primary-bg) 0, #0ea5e9 45%, #0b6ebd 100%);
  color: var(--cp-key-primary-text);
  border-color: rgba(59, 130, 246, 1);
  font-weight: 600;
}

.cp-key--primary:hover,
.cp-key[data-key="plus"]:hover,
.cp-key[data-key="enter"]:hover {
  background: radial-gradient(circle at top, var(--cp-key-primary-bg-hover) 0, #0284c7 60%, #075985 100%);
}

/* Tombol = memanjang (EXE bawah) */

.cp-key--wide {
  grid-column: span 2;
}

/* Tombol angka putih (ala ClassPad) */

.cp-key[data-key="0"],
.cp-key[data-key="1"],
.cp-key[data-key="2"],
.cp-key[data-key="3"],
.cp-key[data-key="4"],
.cp-key[data-key="5"],
.cp-key[data-key="6"],
.cp-key[data-key="7"],
.cp-key[data-key="8"],
.cp-key[data-key="9"],
.cp-key[data-key="00"],
.cp-key[data-key="dot"] {
  background:
    radial-gradient(circle at top, var(--cp-key-num-bg-top) 0, var(--cp-key-num-bg) 60%, var(--cp-key-num-shadow) 100%);
  color: var(--cp-key-num-text);
  border-color: rgba(148, 163, 184, 0.9);
  box-shadow:
    0 1px 0 rgba(148, 163, 184, 0.9),
    0 3px 6px rgba(15, 23, 42, 0.85);
}

/* Tombol fungsi atas (2nd, MODE, ANS, AC) ala baris atas ClassPad */

.cp-key[data-key="2nd"],
.cp-key[data-key="mode"] {
  background: radial-gradient(circle at top, #1d4ed8 0, #1d4ed8 40%, #020617 100%);
  color: #e5e7eb;
  border-color: rgba(37, 99, 235, 0.95);
  font-size: 9px;
  letter-spacing: 0.03em;
}

.cp-key[data-key="ans"],
.cp-key[data-key="clear"] {
  background: radial-gradient(circle at top, #111827 0, #020617 70%, #000 100%);
  color: var(--cp-key-text);
  border-color: rgba(15, 23, 42, 0.95);
}

/* Sedikit highlight untuk backspace & operasi */

.cp-key[data-key="backspace"],
.cp-key[data-key="divide"],
.cp-key[data-key="multiply"],
.cp-key[data-key="minus"] {
  background: radial-gradient(circle at top, #0b1120 0, #020617 70%, #000 100%);
}

/* =========================================================
   RESPONSIVE TWEAKS
   ========================================================= */

@media (max-height: 640px) {
  .cp-app {
    padding: 6px 6px 8px;
  }

  .cp-content {
    grid-template-rows: minmax(140px, 0.9fr) minmax(140px, 1.1fr);
  }

  .cp-graph2d-canvas,
  .cp-graph3d-canvas,
  .cp-stat-graph-canvas {
    height: 120px;
  }
}

@media (max-width: 360px) {
  .cp-device-shell {
    width: 100%;
  }

  .cp-main {
    grid-template-columns: 64px minmax(0, 1fr);
  }

  .cp-keypad-grid {
    gap: 2px;
  }

  .cp-key {
    font-size: 9px;
    padding-inline: 2px;
  }
}

/* =========================================================
   FINAL MOBILE-FIRST UPGRADE PATCH
   ========================================================= */

html {
  min-height: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100dvh;
  padding: max(8px, env(safe-area-inset-top)) 8px max(8px, env(safe-area-inset-bottom));
  overscroll-behavior: none;
}

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

.cp-device-shell {
  width: min(430px, 100%);
}

.cp-app {
  min-height: min(720px, calc(100dvh - 32px));
}

.cp-graph2d-controls,
.cp-finance-actions,
.cp-geometry-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.cp-btn.is-active,
.cp-geometry-toolbar .cp-btn.is-active {
  border-color: var(--cp-accent-blue-soft);
  background: radial-gradient(circle at top, #0ea5e9 0, #0369a1 70%, #020617 100%);
  color: #f8fafc;
}

.cp-finance-view {
  display: none;
}

.cp-finance-view.is-active {
  display: block;
}

.cp-finance-tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.cp-finance-tab {
  flex: 0 0 auto;
  border-radius: 999px;
  border: 1px solid rgba(51, 65, 85, 0.9);
  background: rgba(15, 23, 42, 0.9);
  color: var(--cp-text-secondary);
  padding: 4px 10px;
  font-size: 10px;
}

.cp-finance-tab.is-active {
  color: #f8fafc;
  border-color: var(--cp-accent-blue-soft);
}

.cp-finance-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 6px;
}

.cp-finance-result {
  margin-top: 6px;
  border-radius: 10px;
  padding: 6px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(51, 65, 85, 0.9);
  font-size: 11px;
  color: var(--cp-text-secondary);
}

.cp-finance-result.is-error {
  color: #fecaca;
  border-color: rgba(248, 113, 113, 0.8);
}

.cp-finance-amort-table-wrapper {
  max-height: 230px;
  overflow: auto;
  border-radius: 10px;
  border: 1px solid rgba(30, 41, 59, 0.9);
}

.cp-sheet-wrapper {
  min-width: 100%;
  overflow: auto;
}

.cp-sheet-help {
  position: sticky;
  left: 0;
  margin-bottom: 6px;
  color: var(--cp-text-muted);
  font-size: 10px;
}

.cp-sheet-table {
  border-collapse: collapse;
  min-width: 620px;
  font-size: 10px;
}

.cp-sheet-table th,
.cp-sheet-table td {
  border: 1px solid rgba(51, 65, 85, 0.85);
  padding: 0;
}

.cp-sheet-table th {
  min-width: 34px;
  height: 28px;
  background: rgba(15, 23, 42, 0.95);
  color: var(--cp-text-muted);
  text-align: center;
  font-weight: 600;
}

.cp-sheet-cell {
  width: 74px;
  height: 28px;
  border: 0;
  background: rgba(2, 6, 23, 0.95);
  color: var(--cp-text-primary);
  padding: 3px 5px;
  outline: none;
}

.cp-sheet-cell:focus {
  background: #020617;
  box-shadow: inset 0 0 0 1px var(--cp-accent-blue-soft);
}

.cp-geometry-canvas-wrapper {
  flex: 1 1 auto;
  min-height: 260px;
}

.cp-geometry-canvas {
  width: 100%;
  height: 100%;
  min-height: 260px;
  border-radius: 12px;
  border: 1px solid rgba(51, 65, 85, 0.9);
  background: #020617;
  touch-action: none;
}

.cp-workspace-body--geo,
.cp-workspace-body--finance {
  overflow: auto;
}

.cp-graph2d-canvas,
.cp-graph3d-canvas,
.cp-stat-graph-canvas {
  touch-action: none;
}

@media (max-width: 430px) {
  body {
    padding: 0;
    align-items: stretch;
  }

  .cp-device-shell {
    width: 100%;
    min-height: 100dvh;
  }

  .cp-device-frame {
    border-radius: 0;
    padding: 6px;
    min-height: 100dvh;
  }

  .cp-device-frame::before,
  .cp-device-brand,
  .cp-device-bottom {
    display: none;
  }

  .cp-device-bezel,
  .cp-device-screen {
    border-radius: 0;
    padding: 6px;
    margin: 0;
    min-height: calc(100dvh - 12px);
  }

  .cp-app {
    min-height: calc(100dvh - 24px);
    height: calc(100dvh - 24px);
    border-radius: 14px;
    padding: 6px;
  }

  .cp-header {
    flex-wrap: wrap;
    gap: 4px;
    padding: 5px 6px;
  }

  .cp-brand-title {
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .cp-brand-subtitle {
    display: none;
  }

  .cp-header-center {
    order: 3;
    width: 100%;
    overflow-x: auto;
  }

  .cp-header-mode-indicators {
    min-width: max-content;
    justify-content: flex-start;
  }

  .cp-indicator {
    min-width: 28px;
    padding: 2px 5px;
    font-size: 8px;
  }

  .cp-main {
    display: flex;
    flex-direction: column;
    min-height: 0;
  }

  .cp-content {
    order: 1;
    flex: 1 1 auto;
    min-height: 0;
    grid-template-rows: minmax(135px, 0.85fr) minmax(160px, 1.15fr);
  }

  .cp-tabs {
    order: 2;
    flex-direction: row;
    overflow-x: auto;
    padding: 5px;
    border-radius: 14px;
    scroll-snap-type: x proximity;
  }

  .cp-tab-btn {
    min-width: 54px;
    flex: 0 0 auto;
    scroll-snap-align: start;
    padding: 5px 4px;
  }

  .cp-tab-btn .cp-tab-label {
    font-size: 9px;
  }

  .cp-workspace-body--split,
  .cp-finance-grid {
    grid-template-columns: 1fr;
  }

  .cp-graph2d-canvas,
  .cp-graph3d-canvas,
  .cp-stat-graph-canvas {
    height: 180px;
  }

  .cp-keypad-grid {
    gap: 3px;
  }

  .cp-key {
    min-height: 32px;
    padding-inline: 2px;
  }
}

@media (max-width: 360px) {
  .cp-key {
    min-height: 30px;
    font-size: 8.5px;
  }

  .cp-tab-btn {
    min-width: 50px;
  }
}