/* ==========================================================================
   openvat.no — design system (open-base)
   Ultra-minimal: light neutral background, white borderless surfaces, pills,
   near-monochrome. Geist for content, Geist Mono for numbers and micro labels.
   The accent color is reserved for alarm/critical states only.
   ========================================================================== */

@font-face {
  font-family: "Geist";
  src: url("fonts/Geist-var.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+2000-206F, U+20AC, U+2122, U+2212, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Geist";
  src: url("fonts/Geist-var-ext.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF,
    U+1E00-1EFF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Geist Mono";
  src: url("fonts/GeistMono-var.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+2000-206F, U+20AC, U+2122, U+2212, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Geist Mono";
  src: url("fonts/GeistMono-var-ext.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF,
    U+1E00-1EFF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --bg: #f4f4f2;
  --surface: #ffffff;
  --surface-2: #f4f4f2;
  --surface-3: #e9e9e6;
  --text: #171717;
  --text-2: #666666;
  --text-3: #6f6f6f;
  --border: rgba(0, 0, 0, 0.05);
  --border-strong: rgba(0, 0, 0, 0.1);

  --accent: #d92d20;
  --accent-soft: rgba(217, 45, 32, 0.08);

  --ok: #157f3d;

  --inverse-bg: #171717;
  --inverse-text: #fafafa;

  --ring: rgba(0, 0, 0, 0.1);
  --shadow-overlay: 0 4px 12px rgba(0, 0, 0, 0.04), 0 24px 60px rgba(0, 0, 0, 0.1);

  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --chevron: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236f6f6f' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");

  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0e0e0e;
  --surface: #191919;
  --surface-2: #0e0e0e;
  --surface-3: #262626;
  --text: #ededed;
  --text-2: #a3a3a3;
  --text-3: #9a9a9a;
  --border: rgba(255, 255, 255, 0.07);
  --border-strong: rgba(255, 255, 255, 0.14);

  --accent: #f4645a;
  --accent-soft: rgba(244, 100, 90, 0.12);

  --ok: #6ccb8b;

  --inverse-bg: #fafafa;
  --inverse-text: #171717;

  --ring: rgba(255, 255, 255, 0.16);
  --shadow-overlay: 0 4px 12px rgba(0, 0, 0, 0.4), 0 24px 60px rgba(0, 0, 0, 0.55);

  --chevron: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239a9a9a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");

  color-scheme: dark;
}

/* System dark mode applies unless the user explicitly chose light */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e0e0e;
    --surface: #191919;
    --surface-2: #0e0e0e;
    --surface-3: #262626;
    --text: #ededed;
    --text-2: #a3a3a3;
    --text-3: #9a9a9a;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.14);

    --accent: #f4645a;
    --accent-soft: rgba(244, 100, 90, 0.12);

    --ok: #6ccb8b;

    --inverse-bg: #fafafa;
    --inverse-text: #171717;

    --ring: rgba(255, 255, 255, 0.16);
    --shadow-overlay: 0 4px 12px rgba(0, 0, 0, 0.4), 0 24px 60px rgba(0, 0, 0, 0.55);

    --chevron: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239a9a9a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");

    color-scheme: dark;
  }
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

[hidden] { display: none !important; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* Numbers and data: mono with tabular digits so nothing jumps */
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.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;
}

.icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
  border-radius: 6px;
}

::selection { background: var(--surface-3); }

/* UI chrome must not be text-selectable (iOS long-press etc.).
   Real content/data the user may want to copy stays selectable. */
button, .site-header, .site-footer, .menu, .toast {
  -webkit-user-select: none;
  user-select: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header { background: transparent; }

.header-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-tld { color: var(--text-3); font-weight: 500; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  background: var(--surface);
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.icon-btn:hover { background: var(--surface-3); }
.icon-btn:active { transform: scale(0.94); }

.icon-btn.open { background: var(--inverse-bg); color: var(--inverse-text); }

/* Toggle buttons (on/off states) invert when active */
.toggle-btn.on { background: var(--inverse-bg); color: var(--inverse-text); }
.toggle-btn.on:hover { opacity: 0.85; background: var(--inverse-bg); }

.pill-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease,
              transform 0.15s ease, opacity 0.15s ease;
}

.pill-btn:active { transform: scale(0.97); }

.pill-btn.primary { background: var(--inverse-bg); color: var(--inverse-text); }
.pill-btn.primary:hover { opacity: 0.85; }

.pill-btn.ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: var(--surface);
}

.pill-btn.ghost:hover { background: var(--surface-2); }
.pill-btn[disabled] { opacity: 0.4; pointer-events: none; }

/* --------------------------------------------------------------------------
   Settings menu
   -------------------------------------------------------------------------- */

.settings-wrap { position: relative; }

.menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 296px;
  max-height: min(560px, calc(100dvh - 90px));
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-overlay);
  padding: 20px;
  z-index: 60;
  transform-origin: top right;
  animation: menu-in 0.16s cubic-bezier(0.2, 0.9, 0.3, 1);
}

@keyframes menu-in {
  from { opacity: 0; transform: scale(0.96) translateY(-4px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.menu-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin-bottom: 10px;
}

/* Options share the row evenly when they fit; locales with long words
   («Pantalla completa», «Бегущая строка») wrap to their own row rather
   than wrapping inside the button. gap applies both ways, so the spacing
   between wrapped rows equals the spacing within a row */
.menu-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.menu-grid .opt-btn { flex: 1 1 auto; white-space: nowrap; }

.menu-select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background-color: var(--surface-2);
  background-image: var(--chevron);
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 15px;
  border: none;
  border-radius: 12px;
  padding: 11px 44px 11px 14px;
  cursor: pointer;
}

.opt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 8px;
  border: none;
  border-radius: 999px;
  background: var(--surface-2);
  font-size: 13.5px;
  font-weight: 500;
  text-align: center;
  color: var(--text-2);
  transition: background-color 0.13s ease, color 0.13s ease, transform 0.13s ease;
}

.opt-btn .icon { width: 14px; height: 14px; }

.opt-btn:hover { background: var(--surface-3); color: var(--text); }
.opt-btn:active { transform: scale(0.97); }

.opt-btn.active {
  background: var(--inverse-bg);
  color: var(--inverse-text);
  font-weight: 600;
}

.opt-btn.wide { width: 100%; }
.opt-btn.copied { background: var(--ok); color: #fff; }

.menu-divider {
  height: 1px;
  background: var(--border);
  margin: 18px -20px;
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 14px;
  line-height: 1.35;
  cursor: pointer;
  user-select: none;
}

.switch {
  appearance: none;
  -webkit-appearance: none;
  flex-shrink: 0;
  width: 40px;
  height: 23px;
  border-radius: 999px;
  background: var(--surface-3);
  position: relative;
  cursor: pointer;
  transition: background-color 0.18s ease;
  margin: 0;
}

.switch::after {
  content: "";
  position: absolute;
  top: 2.5px;
  left: 2.5px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
  transition: transform 0.18s ease;
}

.switch:checked { background: var(--inverse-bg); }
.switch:checked::after { transform: translateX(17px); background: var(--inverse-text); }

.menu-info {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.7;
  color: var(--text-3);
}

.menu-info a { color: var(--text-2); text-decoration: none; }
.menu-info a:hover { text-decoration: underline; }

.menu-year { margin-top: 6px; }

/* --------------------------------------------------------------------------
   THE TOOL — the VAT calculator
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
  flex: 1;
}

.calc {
  width: 100%;
  max-width: 560px;
  margin: clamp(8px, 5vh, 56px) auto 40px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: var(--surface);
  border-radius: 24px;
  padding: 24px;
  transition: background-color 0.25s ease;
}

.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin: 0 0 8px;
}

.rate-label { margin-top: 20px; }

/* Owner call: the calculator numbers are set in Geist, not Mono —
   tabular-nums keeps the widths stable while typing */
.amount-input {
  display: block;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: inherit; /* inputs don't inherit the body font on their own */
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(42px, 11vw, 62px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-align: center;
  padding: 2px 0 12px;
  margin: 0;
  caret-color: var(--text);
}

/* The caret in the giant field is the focus indicator; the base outline
   would draw a box around the whole hero number */
.amount-input:focus-visible { outline: none; }

.amount-input::placeholder { color: var(--text-3); opacity: 0.35; }

.seg { display: flex; gap: 8px; }

.seg .opt-btn {
  flex: 1 1 0;
  padding-block: 10px;
  white-space: nowrap;
}

.rate-hint {
  margin: 12px 0 0;
  min-height: 18px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--text-3);
}

.result-card { padding: 8px 10px; }

.res-row {
  display: flex;
  width: 100%;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 16px;
  border-radius: 16px;
  text-align: left;
  transition: background-color 0.13s ease, transform 0.13s ease;
}

.res-row:hover { background: var(--surface-2); }
.res-row:active { transform: scale(0.985); }

.res-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
}

.res-value {
  font-size: 20px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

/* The row that merely echoes the typed amount steps back; computed values lead */
.res-row.echo .res-value { color: var(--text-2); font-weight: 500; }

.res-row.copied .res-value { color: var(--ok); }

@media (max-width: 600px) {
  .card { padding: 20px; }
  .result-card { padding: 6px 8px; }
  .res-row { padding: 13px 12px; }
  .res-value { font-size: 18px; }
}

/* --------------------------------------------------------------------------
   Toast
   -------------------------------------------------------------------------- */

.toast {
  position: fixed;
  inset: auto; /* resets popover UA styling (inset: 0) */
  margin: 0;
  border: 0;
  bottom: calc(24px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translate(-50%, 16px);
  background: var(--inverse-bg);
  color: var(--inverse-text);
  font-size: 14px;
  font-weight: 500;
  padding: 12px 22px;
  border-radius: 999px;
  box-shadow: var(--shadow-overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
  z-index: 100;
  max-width: calc(100vw - 40px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  text-align: center;
  padding: 24px 20px calc(24px + env(safe-area-inset-bottom));
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: var(--text-3);
}

.site-footer p { margin: 0; }
.site-footer a { color: var(--text-2); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

/* --------------------------------------------------------------------------
   Mobile
   -------------------------------------------------------------------------- */

@media (max-width: 600px) {
  .menu { width: min(296px, calc(100vw - 32px)); }
}