/* =========================================================================
   Telegraph-Image — shared Material 3-inspired design foundation
   Used by both the public workspace (/index.html) and the Remote Storage
   Console (/admin.html, /login.html). Keep this layer framework-free.
   ========================================================================= */

:root {
  --md-sys-color-primary: #2f5d45;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #c5e8d1;
  --md-sys-color-on-primary-container: #0b1f15;
  --md-sys-color-secondary: #7a5436;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #ffdcc3;
  --md-sys-color-on-secondary-container: #2c1604;
  --md-sys-color-tertiary: #4a5b80;
  --md-sys-color-tertiary-container: #d6e0ff;
  --md-sys-color-on-tertiary-container: #051333;
  --md-sys-color-error: #ba1a1a;
  --md-sys-color-on-error: #ffffff;
  --md-sys-color-error-container: #ffdad6;
  --md-sys-color-on-error-container: #410002;
  --md-sys-color-surface: #f8f4ef;
  --md-sys-color-surface-dim: #d9d5d0;
  --md-sys-color-surface-bright: #f8f4ef;
  --md-sys-color-surface-container-lowest: #ffffff;
  --md-sys-color-surface-container-low: #f2eee8;
  --md-sys-color-surface-container: #ece8e2;
  --md-sys-color-surface-container-high: #e6e2dc;
  --md-sys-color-surface-container-highest: #e0dcd6;
  --md-sys-color-on-surface: #1c1b19;
  --md-sys-color-on-surface-variant: #544f48;
  --md-sys-color-outline: #877f75;
  --md-sys-color-outline-variant: #d8d0c6;
  --md-sys-color-inverse-surface: #31302e;
  --md-sys-color-inverse-on-surface: #f4f0eb;
  --md-sys-color-inverse-primary: #a9cdb6;
  --md-sys-color-scrim: rgba(28, 27, 25, 0.42);
  --md-sys-color-shadow: 16, 15, 13;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;

  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  --elev-0: none;
  --elev-1: 0 1px 2px rgba(var(--md-sys-color-shadow), 0.08), 0 1px 3px 1px rgba(var(--md-sys-color-shadow), 0.04);
  --elev-2: 0 1px 2px rgba(var(--md-sys-color-shadow), 0.1), 0 2px 6px 2px rgba(var(--md-sys-color-shadow), 0.06);
  --elev-3: 0 4px 8px 3px rgba(var(--md-sys-color-shadow), 0.08), 0 1px 3px rgba(var(--md-sys-color-shadow), 0.1);

  --font: "Segoe UI Variable", "Segoe UI", "SF Pro Text", "Inter", "Noto Sans", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, monospace;

  --type-display: 600 1.375rem/1.25 var(--font);
  --type-headline: 600 1.25rem/1.3 var(--font);
  --type-title: 600 1rem/1.35 var(--font);
  --type-title-sm: 600 0.875rem/1.35 var(--font);
  --type-body: 400 0.875rem/1.45 var(--font);
  --type-label: 500 0.75rem/1.3 var(--font);
  --type-label-lg: 500 0.8125rem/1.3 var(--font);

  --header-h: 64px;
  --sidebar-w: 232px;
  --rail-w: 80px;
  --bottom-nav-h: 64px;
  --status-h: 36px;
  --focus: 0 0 0 2px var(--md-sys-color-surface), 0 0 0 4px var(--md-sys-color-primary);
  --focus-inverse: 0 0 0 2px var(--md-sys-color-primary-container), 0 0 0 4px var(--md-sys-color-on-primary-container);
  --ease-out: cubic-bezier(0.05, 0.7, 0.1, 1);
  --ease-in: cubic-bezier(0.3, 0, 1, 1);
  --dur: 180ms;
  --dur-med: 240ms;
}

html[data-theme="dark"] {
  --md-sys-color-primary: #a9cdb6;
  --md-sys-color-on-primary: #013822;
  --md-sys-color-primary-container: #16452f;
  --md-sys-color-on-primary-container: #c5e8d1;
  --md-sys-color-secondary: #e8b992;
  --md-sys-color-on-secondary: #462a12;
  --md-sys-color-secondary-container: #5e3d24;
  --md-sys-color-on-secondary-container: #ffdcc3;
  --md-sys-color-tertiary: #b6c5eb;
  --md-sys-color-tertiary-container: #334367;
  --md-sys-color-on-tertiary-container: #d6e0ff;
  --md-sys-color-error: #ffb4ab;
  --md-sys-color-on-error: #690005;
  --md-sys-color-error-container: #93000a;
  --md-sys-color-on-error-container: #ffdad6;
  --md-sys-color-surface: #141311;
  --md-sys-color-surface-dim: #141311;
  --md-sys-color-surface-bright: #3a3936;
  --md-sys-color-surface-container-lowest: #0e0d0c;
  --md-sys-color-surface-container-low: #1c1b19;
  --md-sys-color-surface-container: #201f1d;
  --md-sys-color-surface-container-high: #2b2926;
  --md-sys-color-surface-container-highest: #363430;
  --md-sys-color-on-surface: #e8e4df;
  --md-sys-color-on-surface-variant: #c8c1b7;
  --md-sys-color-outline: #928b81;
  --md-sys-color-outline-variant: #47433d;
  --md-sys-color-inverse-surface: #e8e4df;
  --md-sys-color-inverse-on-surface: #31302e;
  --md-sys-color-inverse-primary: #2f5d45;
  --md-sys-color-scrim: rgba(0, 0, 0, 0.56);
  --md-sys-color-shadow: 0, 0, 0;
}

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

html, body { height: 100%; margin: 0; }

html { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }

body {
  font: var(--type-body);
  font-family: var(--font);
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
img { max-width: 100%; display: block; }
a { color: var(--md-sys-color-primary); }
ul, ol { margin: 0; padding: 0; list-style: none; }

:focus { outline: none; }
:focus-visible { box-shadow: var(--focus); border-radius: var(--radius-xs); }

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -48px;
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-radius: var(--radius-xs);
  text-decoration: none;
  font: var(--type-label-lg);
}
.skip-link:focus { top: var(--space-3); box-shadow: var(--focus); }

/* Screen-reader-only utility */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 40px;
  padding: 0 var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--md-sys-color-primary);
  font: var(--type-label-lg);
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}
.btn:hover { background: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent); }
.btn:active { background: color-mix(in srgb, var(--md-sys-color-primary) 14%, transparent); }
.btn:disabled { opacity: 0.45; pointer-events: none; }

.btn-filled {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}
.btn-filled:hover { background: color-mix(in srgb, var(--md-sys-color-on-primary) 8%, var(--md-sys-color-primary)); }
.btn-filled:active { background: color-mix(in srgb, var(--md-sys-color-on-primary) 14%, var(--md-sys-color-primary)); }

.btn-tonal {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}
.btn-tonal:hover { filter: brightness(0.97); }

.btn-outlined {
  border-color: var(--md-sys-color-outline);
  color: var(--md-sys-color-on-surface);
}
.btn-outlined:hover { background: color-mix(in srgb, var(--md-sys-color-on-surface) 6%, transparent); }

.btn-text { padding: 0 var(--space-3); height: 36px; }

.btn-danger {
  background: var(--md-sys-color-error);
  color: var(--md-sys-color-on-error);
}
.btn-danger:hover { filter: brightness(0.96); }

.btn-danger-tonal {
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}

.btn-sm { height: 32px; padding: 0 var(--space-3); font: var(--type-label); }
.btn-block { width: 100%; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  position: relative;
  transition: background var(--dur) var(--ease-out);
}
.icon-btn:hover { background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent); }
.icon-btn svg { width: 22px; height: 22px; }

/* ---------- Text fields ---------- */
.field { position: relative; display: flex; flex-direction: column; gap: 6px; }
.field-label {
  font: var(--type-label-lg);
  color: var(--md-sys-color-on-surface-variant);
  padding: 0 var(--space-2);
}
.field-control {
  height: 48px;
  width: 100%;
  padding: 0 var(--space-4);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--radius-xs);
  background: var(--md-sys-color-surface-container-lowest);
  color: var(--md-sys-color-on-surface);
  transition: border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}
.field-control::placeholder { color: var(--md-sys-color-on-surface-variant); }
.field-control:hover { border-color: var(--md-sys-color-on-surface); }
.field-control:focus {
  border-color: var(--md-sys-color-primary);
  box-shadow: inset 0 0 0 1px var(--md-sys-color-primary);
}
.field.has-error .field-control {
  border-color: var(--md-sys-color-error);
  box-shadow: inset 0 0 0 1px var(--md-sys-color-error);
}
.field-error {
  color: var(--md-sys-color-error);
  font: var(--type-label);
  min-height: 1em;
  padding: 0 var(--space-2);
}

/* ---------- Segmented control ---------- */
.segmented {
  display: inline-flex;
  padding: 2px;
  background: var(--md-sys-color-surface-container-high);
  border-radius: var(--radius-pill);
  gap: 2px;
}
.segmented button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 32px;
  padding: 0 var(--space-3);
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--type-label-lg);
}
.segmented button[aria-pressed="true"] {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}
.segmented button svg { width: 16px; height: 16px; }

/* ---------- Chips / badges ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--type-label);
  border: 1px solid var(--md-sys-color-outline-variant);
}
.chip-primary { background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); border-color: transparent; }
.chip-warn { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); border-color: transparent; }
.chip-danger { background: var(--md-sys-color-error-container); color: var(--md-sys-color-on-error-container); border-color: transparent; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }

/* ---------- Cards ---------- */
.card {
  background: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--radius-md);
}

/* ---------- Snackbar ---------- */
.snackbar {
  position: fixed;
  left: 50%;
  bottom: var(--space-6);
  transform: translate(-50%, 16px);
  max-width: min(560px, calc(100vw - 32px));
  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xs);
  box-shadow: var(--elev-3);
  font: var(--type-body);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  opacity: 0;
  pointer-events: none;
  z-index: 150;
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
}
.snackbar.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.snackbar .snackbar-action {
  background: transparent;
  border: 0;
  color: var(--md-sys-color-inverse-primary);
  font: var(--type-label-lg);
  text-transform: uppercase;
}
.snackbar.is-error { background: var(--md-sys-color-error-container); color: var(--md-sys-color-on-error-container); }
.snackbar.is-error .snackbar-action { color: var(--md-sys-color-error); }

/* ---------- Dialog ---------- */
.scrim {
  position: fixed;
  inset: 0;
  background: var(--md-sys-color-scrim);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-out);
  z-index: 100;
}
.scrim.open { opacity: 1; pointer-events: auto; }

.dialog {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -48%) scale(0.96);
  width: min(480px, calc(100vw - 32px));
  max-height: calc(100vh - 64px);
  overflow: auto;
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--elev-3);
  padding: var(--space-6);
  opacity: 0;
  pointer-events: none;
  z-index: 110;
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
}
.dialog.open { opacity: 1; transform: translate(-50%, -50%) scale(1); pointer-events: auto; }
.dialog h2 { margin: 0 0 var(--space-2); font: var(--type-headline); }
.dialog p { margin: 0 0 var(--space-5); color: var(--md-sys-color-on-surface-variant); }
.dialog .dialog-actions { display: flex; justify-content: flex-end; gap: var(--space-2); flex-wrap: wrap; }

/* ---------- Side sheet ---------- */
.sheet-backdrop {
  position: fixed; inset: 0; background: var(--md-sys-color-scrim);
  opacity: 0; pointer-events: none; z-index: 90;
  transition: opacity var(--dur-med) var(--ease-out);
}
.sheet-backdrop.open { opacity: 1; pointer-events: auto; }
.sheet {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: min(460px, 100vw);
  background: var(--md-sys-color-surface-container);
  box-shadow: var(--elev-3);
  transform: translateX(100%);
  transition: transform var(--dur-med) var(--ease-out);
  z-index: 95;
  display: flex;
  flex-direction: column;
}
.sheet.open { transform: translateX(0); }
.sheet-header {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-4);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}
.sheet-header h2 { margin: 0; font: var(--type-title); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sheet-body { padding: var(--space-4); overflow: auto; flex: 1; }
.sheet-actions {
  padding: var(--space-4);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  display: flex; flex-wrap: wrap; gap: var(--space-2);
}

/* ---------- Menu ---------- */
.menu {
  position: fixed;
  min-width: 180px;
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--radius-sm);
  box-shadow: var(--elev-2);
  padding: var(--space-1);
  z-index: 130;
}
.menu button, .menu a {
  display: flex; align-items: center; gap: var(--space-3);
  width: 100%; text-align: left;
  padding: var(--space-2) var(--space-3);
  border: 0; border-radius: var(--radius-xs);
  background: transparent; color: var(--md-sys-color-on-surface);
  font: var(--type-body); text-decoration: none;
}
.menu button:hover, .menu a:hover { background: var(--md-sys-color-surface-container-high); }
.menu button.danger, .menu a.danger { color: var(--md-sys-color-error); }
.menu hr { border: 0; border-top: 1px solid var(--md-sys-color-outline-variant); margin: var(--space-1) 0; }

/* ---------- Spinner ---------- */
.spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid currentColor; border-right-color: transparent;
  animation: spin 0.7s linear infinite; display: inline-block;
}
.btn .spinner { width: 16px; height: 16px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Command palette ---------- */
.palette {
  position: fixed;
  top: 12vh; left: 50%; transform: translate(-50%, -8px);
  width: min(560px, calc(100vw - 32px));
  background: var(--md-sys-color-surface-container-high);
  border-radius: var(--radius-lg);
  box-shadow: var(--elev-3);
  z-index: 120;
  overflow: hidden;
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
}
.palette.open { opacity: 1; pointer-events: auto; transform: translate(-50%, 0); }
.palette input {
  width: 100%; height: 56px; padding: 0 var(--space-5);
  border: 0; background: transparent; color: var(--md-sys-color-on-surface);
  font: var(--type-title);
}
.palette-results { max-height: 50vh; overflow: auto; padding: var(--space-1); }
.palette-item {
  display: flex; align-items: center; gap: var(--space-3);
  width: 100%; text-align: left; padding: var(--space-3);
  border: 0; border-radius: var(--radius-sm);
  background: transparent; color: var(--md-sys-color-on-surface);
}
.palette-item.active, .palette-item:hover { background: var(--md-sys-color-surface-container-highest); }
.palette-item kbd {
  margin-left: auto; font: var(--type-label);
  color: var(--md-sys-color-on-surface-variant);
  background: var(--md-sys-color-surface-container-lowest);
  padding: 2px 6px; border-radius: 6px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}