/* =====================================================
   Tax Calculator 2026 — Styles
   Adapted for buhuchet-rf.ru (Rubik + Montserrat, coral/red palette)
   ===================================================== */

/* --- Design Tokens --- */
:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 800px;
  --content-wide: 1080px;

  /* Fonts — matching buhuchet-rf.ru */
  --font-display: 'Rubik', 'Helvetica Neue', sans-serif;
  --font-body: 'Montserrat', 'Helvetica Neue', sans-serif;
}

/* --- Light Theme (Coral / White — matching buhuchet-rf.ru) --- */
:root,
[data-theme='light'] {
  --color-bg: #F7F8FA;
  --color-surface: #ffffff;
  --color-surface-2: #f8f9fb;
  --color-surface-offset: #eef1f5;
  --color-divider: #dde1e8;
  --color-border: #cdd3dc;

  --color-text: #212121;
  --color-text-muted: #5c6478;
  --color-text-faint: #9ba3b3;
  --color-text-inverse: #ffffff;

  --color-primary: #F27059;
  --color-primary-hover: #d95e47;
  --color-primary-active: #c04e38;
  --color-primary-light: #fdecea;

  --color-accent: #d94f38;
  --color-accent-hover: #bf3e28;
  --color-accent-light: #fde8e5;

  --color-success: #1a7a3d;
  --color-success-bg: #eaf5ee;
  --color-warning: #b5700a;
  --color-warning-bg: #fef6e8;
  --color-error: #b93636;
  --color-error-bg: #fdeaea;
  --color-info: #2563a8;
  --color-info-bg: #e8f0fa;

  --shadow-sm: 0 1px 3px rgba(33,33,33,0.06);
  --shadow-md: 0 4px 16px rgba(33,33,33,0.08);
  --shadow-lg: 0 12px 32px rgba(33,33,33,0.12);
}

/* --- Dark Theme --- */
[data-theme='dark'] {
  --color-bg: #0f1420;
  --color-surface: #181e2c;
  --color-surface-2: #1e2538;
  --color-surface-offset: #151b28;
  --color-divider: #2a3248;
  --color-border: #333d55;

  --color-text: #d4d9e4;
  --color-text-muted: #8892a8;
  --color-text-faint: #5c6680;
  --color-text-inverse: #ffffff;

  --color-primary: #F27059;
  --color-primary-hover: #d95e47;
  --color-primary-active: #c04e38;
  --color-primary-light: #2a1a18;

  --color-accent: #e05a5a;
  --color-accent-hover: #cda030;
  --color-accent-light: #2a2518;

  --color-success: #4caf6a;
  --color-success-bg: #162418;
  --color-warning: #d4a030;
  --color-warning-bg: #2a2414;
  --color-error: #e05a5a;
  --color-error-bg: #2a1616;
  --color-info: #5a9ce0;
  --color-info-bg: #16202e;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0f1420;
    --color-surface: #181e2c;
    --color-surface-2: #1e2538;
    --color-surface-offset: #151b28;
    --color-divider: #2a3248;
    --color-border: #333d55;
    --color-text: #d4d9e4;
    --color-text-muted: #8892a8;
    --color-text-faint: #5c6680;
    --color-text-inverse: #ffffff;
    --color-primary: #F27059;
    --color-primary-hover: #d95e47;
    --color-primary-active: #c04e38;
    --color-primary-light: #2a1a18;
    --color-accent: #e05a5a;
    --color-accent-hover: #cda030;
    --color-accent-light: #2a2518;
    --color-success: #4caf6a;
    --color-success-bg: #162418;
    --color-warning: #d4a030;
    --color-warning-bg: #2a2414;
    --color-error: #e05a5a;
    --color-error-bg: #2a1616;
    --color-info: #5a9ce0;
    --color-info-bg: #16202e;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
  }
}

/* --- Google Fonts для Rubik и Montserrat --- */
@import url('../fonts/site-fonts.css');

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  display: flex;
  flex-direction: column;
}

img, svg { display: block; max-width: 100%; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.2; }
p, li { text-wrap: pretty; max-width: 72ch; }

a, button, [role='button'], input, textarea, select {
  transition: color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}

button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

::selection {
  background: color-mix(in srgb, var(--color-primary) 25%, transparent);
  color: var(--color-text);
}

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

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

main { flex: 1; }

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-4) 0;
}
.header__inner { display: flex; align-items: center; justify-content: space-between; }

.logo { display: flex; align-items: center; gap: var(--space-3); }
.logo__icon { color: var(--color-primary); flex-shrink: 0; }
.logo__text { font-family: var(--font-body); font-weight: 600; font-size: var(--text-sm); color: var(--color-text); }
.logo__year { color: var(--color-accent); font-weight: 700; }

.theme-toggle {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.theme-toggle:hover { background: var(--color-surface-offset); color: var(--color-text); }

/* --- Hero --- */
.hero {
  padding: clamp(var(--space-16), 10vw, var(--space-24)) 0 clamp(var(--space-12), 8vw, var(--space-20));
  text-align: center;
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}
.hero__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto var(--space-8);
}
.hero__cta { margin-bottom: var(--space-8); }
.hero__badges {
  display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-2);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  text-decoration: none;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.btn--primary:active { background: var(--color-primary-active); transform: translateY(0); }
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}
.btn--outline:hover { border-color: var(--color-primary); background: var(--color-primary-light); }
.btn--lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }

/* --- Calculator Section --- */
.calculator {
  padding: 0 0 clamp(var(--space-12), 8vw, var(--space-24));
}

/* --- Progress --- */
.progress {
  position: relative;
  height: 6px;
  background: var(--color-surface-offset);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-2);
  overflow: hidden;
}
.progress__bar {
  position: absolute; left: 0; top: 0; height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  width: 14.28%;
  transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.progress__text {
  display: block;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
  margin-bottom: var(--space-8);
}

/* --- Question Area --- */
.question-area {
  min-height: 400px;
}
.question {
  animation: fadeIn 0.35s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.question__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  text-align: center;
}
.question__hint {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  max-width: 560px;
  margin: 0 auto var(--space-8);
  line-height: 1.55;
}

/* --- Option Cards --- */
.options {
  display: grid;
  gap: var(--space-4);
  max-width: 640px;
  margin: 0 auto;
}
.options--two { grid-template-columns: repeat(2, 1fr); }
.options--list { grid-template-columns: 1fr; }

.option-card {
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  cursor: pointer;
  position: relative;
}
.option-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.option-card.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 20%, transparent);
}

.option-card--list {
  flex-direction: row;
  align-items: center;
  text-align: left;
  padding: var(--space-4) var(--space-6);
  gap: var(--space-4);
}
.option-card--list .option-card__label { font-size: var(--text-base); }
.option-card--list .option-card__desc { font-size: var(--text-xs); }

.option-card__icon { font-size: 2rem; margin-bottom: var(--space-2); }
.option-card__label {
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.option-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.45;
}

/* --- Navigation --- */
.calc-nav {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: var(--space-8);
  max-width: 640px;
  margin-left: auto; margin-right: auto;
}

/* --- Results --- */
.results {
  animation: fadeIn 0.5s ease-out;
}
.results__header {
  text-align: center;
  margin-bottom: var(--space-10);
}
.results__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.results__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}
.results__restart {
  display: block;
  margin: var(--space-10) auto 0;
}

/* Regime Cards */
.regime-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
}
.regime-card--recommended {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}
.regime-card--recommended::before {
  content: 'Рекомендуется';
  position: absolute;
  top: 0; right: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: var(--space-1) var(--space-4) var(--space-1) var(--space-6);
  border-radius: 0 var(--radius-xl) 0 var(--radius-lg);
}
.regime-card--alt {
  opacity: 0.85;
}

.regime-card__header {
  display: flex; align-items: center; gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.regime-card__badge {
  display: inline-flex;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  border-radius: var(--radius-md);
  white-space: nowrap;
}
.regime-card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
}

.regime-card__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.regime-card__stat {
  padding: var(--space-4);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
}
.regime-card__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}
.regime-card__stat-value {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.regime-card__section {
  margin-bottom: var(--space-4);
}
.regime-card__section:last-child { margin-bottom: 0; }
.regime-card__section-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  display: flex; align-items: center; gap: var(--space-2);
}

/* Risk/Pro list */
.tag-list {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  list-style: none;
}
.tag-list__item {
  display: inline-flex; align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  border-radius: var(--radius-full);
  font-weight: 500;
  line-height: 1.5;
  max-width: 100%;
}
.tag-list__item--pro { background: var(--color-success-bg); color: var(--color-success); }
.tag-list__item--risk { background: var(--color-warning-bg); color: var(--color-warning); }
.tag-list__item--info { background: var(--color-info-bg); color: var(--color-info); }

/* Unavailable */
.unavailable-block {
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}
.unavailable-block__title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.unavailable-list {
  list-style: none;
  display: flex; flex-direction: column; gap: var(--space-2);
}
.unavailable-list__item {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
}
.unavailable-list__item::before {
  content: '✕';
  position: absolute; left: 0;
  color: var(--color-error);
  font-weight: 700;
  font-size: var(--text-xs);
}

/* --- Disclaimer --- */
.disclaimer {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  background: var(--color-warning-bg);
  border: 1px solid color-mix(in srgb, var(--color-warning) 25%, transparent);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: var(--space-10) 0;
  line-height: 1.55;
}
.disclaimer__icon { font-size: 1.3rem; flex-shrink: 0; margin-top: var(--space-1); }
.disclaimer strong { color: var(--color-warning); }

/* --- CTA Block --- */
.cta-block {
  text-align: center;
  background: linear-gradient(145deg, var(--color-primary-light), var(--color-surface));
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-8);
}
.cta-block__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.cta-block__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto var(--space-8);
}
.cta-block__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.cta-block__note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-8) 0;
  text-align: center;
}
.footer__copy { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-1); }
.footer__note { font-size: var(--text-xs); color: var(--color-text-faint); }

/* --- Responsive --- */
@media (max-width: 640px) {
  .options--two { grid-template-columns: 1fr; }
  .hero__title br { display: none; }
  .regime-card { padding: var(--space-6) var(--space-4); }
  .regime-card__grid { grid-template-columns: 1fr; }
  .cta-block { padding: var(--space-8) var(--space-4); }
  .cta-block__actions { flex-direction: column; align-items: center; }
  .cta-block__actions .btn { width: 100%; max-width: 320px; }
  .container { padding: 0 var(--space-4); }
}