/* ============================================================
   ACU — Активне Суспільство України
   Design System & Utility CSS
   ============================================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Unbounded:wght@400;600;700&family=Onest:wght@400;500;600&family=JetBrains+Mono:wght@400;600&display=swap');

/* ============================================================
   CSS Custom Properties (Design Tokens)
   ============================================================ */
:root {
  /* Brand Colors */
  --color-orange:        #F26419;
  --color-orange-dark:   #D2510F;
  --color-teal:          #168A82;
  --color-teal-dark:     #0F6F68;

  /* Ink (Text) */
  --color-ink:           #1A1714;
  --color-ink-secondary: #4A443B;
  --color-ink-muted:     #756D62;
  --color-ink-faint:     #A89E8F;

  /* Borders */
  --color-border:        #E8E9E5;

  /* Surfaces */
  --color-surface-white: #FFFFFF;
  --color-surface-light: #F6F7F5;
  --color-surface-teal:  #EFF6F4;
  --color-surface-warm:  #FDF3EC;

  /* Typography */
  --font-display: 'Unbounded', sans-serif;
  --font-body:    'Onest', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Border Radius */
  --radius-sm:   10px;
  --radius-md:   16px;
  --radius-lg:   22px;
  --radius-pill: 100px;

  /* Spacing */
  --container-max:     1280px;
  --container-padding: 24px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26, 23, 20, 0.08), 0 1px 2px rgba(26, 23, 20, 0.05);
  --shadow-md: 0 4px 12px rgba(26, 23, 20, 0.10), 0 2px 6px rgba(26, 23, 20, 0.06);
  --shadow-lg: 0 8px 28px rgba(26, 23, 20, 0.12), 0 4px 12px rgba(26, 23, 20, 0.07);
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background-color: var(--color-surface-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

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

/* ============================================================
   Typography Utilities
   ============================================================ */
.font-display { font-family: var(--font-display); }
.font-body    { font-family: var(--font-body); }
.font-mono    { font-family: var(--font-mono); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-ink);
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p { line-height: 1.7; }

/* ============================================================
   Color Utilities — Text
   ============================================================ */
.text-ink           { color: var(--color-ink); }
.text-ink-secondary { color: var(--color-ink-secondary); }
.text-ink-muted     { color: var(--color-ink-muted); }
.text-ink-faint     { color: var(--color-ink-faint); }
.text-brand-orange  { color: var(--color-orange); }
.text-brand-teal    { color: var(--color-teal); }
.text-white         { color: var(--color-surface-white); }

/* ============================================================
   Color Utilities — Backgrounds
   ============================================================ */
.bg-white        { background-color: var(--color-surface-white); }
.bg-surface-light { background-color: var(--color-surface-light); }
.bg-surface-teal { background-color: var(--color-surface-teal); }
.bg-surface-warm { background-color: var(--color-surface-warm); }
.bg-brand-orange { background-color: var(--color-orange); }
.bg-brand-teal   { background-color: var(--color-teal); }
.bg-ink          { background-color: var(--color-ink); }

/* ============================================================
   Border Radius Utilities
   ============================================================ */
.rounded-sm   { border-radius: var(--radius-sm); }
.rounded-md   { border-radius: var(--radius-md); }
.rounded-lg   { border-radius: var(--radius-lg); }
.rounded-pill { border-radius: var(--radius-pill); }

/* ============================================================
   Layout — Container
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* ============================================================
   Layout — Grid
   ============================================================ */
.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 24px;
}

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr 1fr; }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================================
   Sections
   ============================================================ */
.section {
  padding-block: 80px;
}

.section-sm {
  padding-block: 48px;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-sm {
  font-size: 0.875rem;
  padding: 10px 20px;
}

.btn-lg {
  font-size: 1.0625rem;
  padding: 18px 36px;
}

.btn-orange {
  background-color: var(--color-orange);
  color: var(--color-surface-white);
  border-color: var(--color-orange);
}

.btn-orange:hover {
  background-color: var(--color-orange-dark);
  border-color: var(--color-orange-dark);
  color: var(--color-surface-white);
}

.btn-teal {
  background-color: var(--color-teal);
  color: var(--color-surface-white);
  border-color: var(--color-teal);
}

.btn-teal:hover {
  background-color: var(--color-teal-dark);
  border-color: var(--color-teal-dark);
  color: var(--color-surface-white);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-ink);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-ink);
  background-color: transparent;
  color: var(--color-ink);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background-color: var(--color-surface-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-light);
  color: var(--color-ink-secondary);
}

.badge-orange {
  background-color: var(--color-surface-warm);
  color: var(--color-orange-dark);
}

.badge-teal {
  background-color: var(--color-surface-teal);
  color: var(--color-teal-dark);
}

/* ============================================================
   Chips / Tags
   ============================================================ */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-light);
  color: var(--color-ink-secondary);
  border: 1px solid var(--color-border);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  cursor: default;
}

.chip:hover {
  background-color: var(--color-surface-teal);
  color: var(--color-teal);
  border-color: var(--color-teal);
}

/* ============================================================
   Alerts
   ============================================================ */
.alert-error,
.alert-success {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.5;
}

.alert-error {
  background-color: #FEF2F2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

.alert-success {
  background-color: var(--color-surface-teal);
  color: var(--color-teal-dark);
  border: 1px solid #A7D7D4;
}

/* ============================================================
   Flash Messages
   ============================================================ */
.flash-message {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  min-width: 280px;
  max-width: 420px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-weight: 500;
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}

label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-ink-secondary);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="number"],
input[type="search"],
input[type="url"],
input[type="date"],
textarea,
select {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-ink);
  background-color: var(--color-surface-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(22, 138, 130, 0.15);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-ink-faint);
}

textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

select {
  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='%23756D62' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 42px;
}

.form-error {
  font-size: 0.8125rem;
  color: #DC2626;
}

/* ============================================================
   Site Header / Navigation
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-ink);
  max-width: 130px;
}

.desktop-nav {
  display: none;
  align-items: center;
  gap: 4px;
  flex: 1;
}

@media (min-width: 1024px) {
  .desktop-nav { display: flex; }
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-light);
}

.nav-link.active {
  color: var(--color-teal);
  background-color: var(--color-surface-teal);
  font-weight: 600;
}

.header-actions {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

@media (min-width: 768px) {
  .header-actions { display: flex; }
}

.menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  margin-left: auto;
  transition: background-color var(--transition-fast);
}

.menu-btn:hover {
  background-color: var(--color-surface-light);
}

@media (min-width: 1024px) {
  .menu-btn { display: none; }
}

/* Mobile Nav */
.mobile-nav {
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-white);
  padding: 16px var(--container-padding) 24px;
}

.mobile-nav[hidden] { display: none; }

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 20px;
}

.mobile-nav-link {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-ink-secondary);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.mobile-nav-link:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-light);
}

.mobile-nav-link.active {
  color: var(--color-teal);
  background-color: var(--color-surface-teal);
  font-weight: 600;
}

.mobile-nav-actions {
  display: flex;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero {
  background-color: var(--color-surface-light);
  padding-block: 96px 80px;
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: 16px;
}

.hero-title {
  margin-bottom: 20px;
  max-width: 720px;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-ink-secondary);
  max-width: 580px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ============================================================
   Site Footer
   ============================================================ */
.site-footer {
  background-color: var(--color-ink);
  color: var(--color-ink-faint);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.5fr repeat(3, 1fr); }
}

.footer-brand .logo-text {
  color: var(--color-surface-white);
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-ink-faint);
  margin-top: 16px;
  line-height: 1.7;
  max-width: 280px;
}

.footer-socials {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.07);
  color: var(--color-ink-faint);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.footer-social-link:hover {
  background-color: var(--color-orange);
  color: var(--color-surface-white);
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-surface-white);
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--color-ink-faint);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-surface-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-block: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
}

.footer-bottom a {
  color: var(--color-ink-muted);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover {
  color: var(--color-surface-white);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ============================================================
   Admin Layout
   ============================================================ */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 260px;
  flex-shrink: 0;
  background-color: var(--color-ink);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.admin-main {
  flex: 1;
  padding: 40px 48px;
  background-color: var(--color-surface-light);
  overflow-x: hidden;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink-faint);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.sidebar-link:hover {
  color: var(--color-surface-white);
  background-color: rgba(255, 255, 255, 0.08);
}

.sidebar-link.active {
  color: var(--color-surface-white);
  background-color: var(--color-teal);
}

.sidebar-section-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  padding: 16px 14px 8px;
}

/* ============================================================
   FAQ Accordion
   ============================================================ */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 8px;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-ink);
  background-color: var(--color-surface-white);
  cursor: pointer;
  text-align: left;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--color-surface-light);
}

.faq-question-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  transition: transform var(--transition-base);
  color: var(--color-ink-muted);
}

.faq-item.open .faq-question-icon {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 24px 24px;
  color: var(--color-ink-secondary);
  line-height: 1.7;
  background-color: var(--color-surface-white);
}

.faq-item.open .faq-answer {
  display: block;
}

/* ============================================================
   Lightbox
   ============================================================ */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 9998;
  background-color: rgba(26, 23, 20, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.lightbox-close {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  background-color: rgba(255, 255, 255, 0.15);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.lightbox-close:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

/* ============================================================
   Gallery Images
   ============================================================ */
.gallery-img {
  cursor: zoom-in;
  border-radius: var(--radius-md);
  transition: opacity var(--transition-fast);
}

.gallery-img:hover {
  opacity: 0.92;
}

/* ============================================================
   Miscellaneous Utilities
   ============================================================ */
.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;
}

.text-center  { text-align: center; }
.text-left    { text-align: left; }
.text-right   { text-align: right; }

.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

.w-full  { width: 100%; }
.mt-2    { margin-top: 8px; }
.mt-4    { margin-top: 16px; }
.mt-6    { margin-top: 24px; }
.mb-2    { margin-bottom: 8px; }
.mb-4    { margin-bottom: 16px; }
.mb-6    { margin-bottom: 24px; }

.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: 32px;
}

/* Loading spinner for buttons */
.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   Responsive Helpers
   ============================================================ */
@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
  .section     { padding-block: 56px; }
  .section-sm  { padding-block: 36px; }
  .admin-main  { padding: 24px 16px; }
}

@media (min-width: 768px) {
  .hide-desktop { display: none !important; }
}