/* ============================================================
   Stomaline Design System v1
   Токени + базові компоненти.
   ============================================================ */

:root {
  /* ---------- Primary (Teal) ---------- */
  --color-primary-50:  #E6F4F1;
  --color-primary-100: #C1E4DD;
  --color-primary-200: #97D3C7;
  --color-primary-300: #6DC2B0;
  --color-primary-400: #43B19A;
  --color-primary-500: #1FA086;
  --color-primary-600: #168670;
  --color-primary-700: #0E6C5A;
  --color-primary-800: #075345;
  --color-primary-900: #033A30;

  /* ---------- Accent (Coral) ---------- */
  --color-accent-100: #FFEDD5;
  --color-accent-400: #FB923C;
  --color-accent-500: #F97316;
  --color-accent-600: #EA580C;
  --color-accent-700: #C2410C;

  /* ---------- Neutrals (warm gray) ---------- */
  --color-neutral-50:  #FAFAF8;
  --color-neutral-100: #F4F4F0;
  --color-neutral-200: #E8E8E0;
  --color-neutral-300: #D1D1C5;
  --color-neutral-400: #A3A399;
  --color-neutral-500: #6B6B5F;
  --color-neutral-700: #4D4D44;
  --color-neutral-800: #3F3F37;
  --color-neutral-900: #1A1A16;

  /* ---------- Semantic ---------- */
  --color-success-bg:   #DCFCE7;
  --color-success-text: #15803D;
  --color-success-500:  #16A34A;
  --color-warning-bg:   #FEF3C7;
  --color-warning-text: #A16207;
  --color-warning-500:  #EAB308;
  --color-danger-bg:    #FEE2E2;
  --color-danger-text:  #B91C1C;
  --color-danger-500:   #DC2626;
  --color-info-bg:      #E6F4F1;
  --color-info-text:    #075345;

  /* ---------- Aliases ---------- */
  --color-bg:            var(--color-neutral-50);
  --color-surface:       #FFFFFF;
  --color-surface-alt:   var(--color-neutral-100);
  --color-border:        var(--color-neutral-200);
  --color-border-strong: var(--color-neutral-300);
  --color-text:          var(--color-neutral-800);
  --color-text-muted:    var(--color-neutral-500);
  --color-text-heading:  var(--color-neutral-900);
  --color-link:          var(--color-primary-600);
  --color-link-hover:    var(--color-primary-700);

  /* ---------- Typography ---------- */
  --font-sans: 'Onest', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  --leading-tight:   1.15;
  --leading-snug:    1.3;
  --leading-normal:  1.5;
  --leading-relaxed: 1.6;
  --leading-loose:   1.75;

  --tracking-tighter: -0.02em;
  --tracking-tight:   -0.01em;
  --tracking-normal:  0;
  --tracking-wide:    0.025em;
  --tracking-wider:   0.05em;

  --weight-regular: 400;
  --weight-medium:  500;
  --weight-bold:    600;

  /* ---------- Spacing (4px base) ---------- */
  --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:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  /* ---------- Shadows ---------- */
  --shadow-xs:    0 1px 2px rgba(26, 26, 22, 0.04);
  --shadow-sm:    0 2px 8px rgba(26, 26, 22, 0.05);
  --shadow-md:    0 4px 16px rgba(26, 26, 22, 0.07);
  --shadow-lg:    0 12px 32px rgba(26, 26, 22, 0.09);
  --shadow-focus: 0 0 0 3px rgba(31, 160, 134, 0.25);

  /* ---------- Transitions ---------- */
  --transition-fast: 120ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 320ms ease-out;

  /* ---------- Container ---------- */
  --container-max: 1200px;
  --container-padding: var(--space-4);

  /* ---------- Z-index ---------- */
  --z-base:    1;
  --z-sticky:  100;
  --z-overlay: 500;
  --z-modal:   1000;
  --z-toast:   2000;
}

@media (min-width: 768px) {
  :root { --container-padding: var(--space-6); }
}

/* ============================================================
   Base
   ============================================================ */

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  margin: 0 0 var(--space-4);
  color: var(--color-text-heading);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-snug);
}

h1 { font-size: var(--text-4xl); line-height: var(--leading-tight); letter-spacing: var(--tracking-tighter); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p { margin: 0 0 var(--space-4); }

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-link-hover); text-decoration: underline; text-underline-offset: 3px; }

img, picture, video { max-width: 100%; height: auto; display: block; }

/* Доступність */
*:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.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;
}

/* ============================================================
   Container
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: inherit;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  line-height: 1.2;
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
  white-space: nowrap;
}

.btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }

.btn--primary { background: var(--color-primary-500); color: #FFFFFF; }
.btn--primary:hover { background: var(--color-primary-600); color: #FFFFFF; text-decoration: none; }
.btn--primary:active { background: var(--color-primary-700); }

.btn--accent { background: var(--color-accent-500); color: #FFFFFF; }
.btn--accent:hover { background: var(--color-accent-600); color: #FFFFFF; text-decoration: none; }

.btn--outline {
  background: transparent;
  color: var(--color-primary-600);
  border-color: var(--color-primary-500);
}
.btn--outline:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
  text-decoration: none;
}

.btn--ghost { background: transparent; color: var(--color-text); padding-left: var(--space-3); padding-right: var(--space-3); }
.btn--ghost:hover { background: var(--color-neutral-100); color: var(--color-text-heading); text-decoration: none; }

.btn--sm { padding: var(--space-2) var(--space-4); font-size: var(--text-sm); }
.btn--lg { padding: var(--space-4) var(--space-8); font-size: var(--text-lg); }
.btn--block { width: 100%; }

.btn[data-loading="true"] { pointer-events: none; opacity: 0.7; }
.btn[data-loading="true"] .btn__label::after {
  content: '...';
  animation: dots 1.2s steps(3, end) infinite;
}
@keyframes dots {
  0%, 20% { content: ''; }
  40% { content: '.'; }
  60% { content: '..'; }
  80%, 100% { content: '...'; }
}

/* ============================================================
   Forms
   ============================================================ */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
}
.label--required::after { content: ' *'; color: var(--color-danger-500); }
.label__hint { color: var(--color-neutral-400); font-weight: var(--weight-regular); }

.input, .select, .textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--text-base);
  color: var(--color-text-heading);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.textarea { resize: vertical; min-height: 80px; line-height: var(--leading-normal); }
.select { appearance: none; padding-right: var(--space-10); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B6B5F' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right var(--space-3) center; }

.input::placeholder, .textarea::placeholder { color: var(--color-neutral-400); }

.input:hover, .select:hover, .textarea:hover { border-color: var(--color-border-strong); }

.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: var(--shadow-focus);
}

.input--success { border-color: var(--color-success-500); }
.input--error   { border-color: var(--color-danger-500); }

/* Селект, заповнений із query-параметра (?service=…) — підсвічуємо як у фокусі */
.select--prefilled { border-color: var(--color-primary-500); box-shadow: var(--shadow-focus); }

.hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.hint--success { color: var(--color-success-text); }
.hint--error   { color: var(--color-danger-text); }

/* ============================================================
   Badges / Tags
   ============================================================ */

.tag, .badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-full);
  background: var(--color-neutral-100);
  color: var(--color-neutral-800);
}

.tag--primary, .badge--primary { background: var(--color-primary-50); color: var(--color-primary-700); }
.tag--accent,  .badge--accent  { background: var(--color-accent-100); color: var(--color-accent-700); }
.badge--success { background: var(--color-success-bg); color: var(--color-success-text); }
.badge--warning { background: var(--color-warning-bg); color: var(--color-warning-text); }
.badge--danger  { background: var(--color-danger-bg);  color: var(--color-danger-text); }

/* ============================================================
   Section header (спільний для всіх блоків)
   ============================================================ */

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-10);
}

.section-header__eyebrow {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--color-primary-700);
  background: var(--color-primary-50);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-header__title {
  font-size: var(--text-3xl);
  line-height: var(--leading-snug);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-heading);
  margin: 0 0 var(--space-3);
}
@media (min-width: 768px) {
  .section-header__title { font-size: var(--text-4xl); }
}

.section-header__subtitle {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-muted);
  margin: 0;
}

/* ============================================================
   Reduced motion
   ============================================================ */

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