/* zinDbot — дизайн-система, согласованная с tools.zin.pw (Montserrat,
   primary #33c3f0 / #8774e1, тёмная тема по умолчанию). Без фреймворков —
   лёгкий CSS + нативные grid/flex. */

:root {
  --font-sans: "Montserrat", -apple-system, BlinkMacSystemFont, sans-serif;

  --color-bg: #ffffff;
  --color-fg: #2f3a40;
  --color-muted: #6b7680;
  --color-primary: #33c3f0;
  --color-primary-fg: #04222c;
  --color-card: #f7f9fb;
  --color-border: rgba(15, 23, 30, 0.08);
  --shadow-card: 0 10px 30px rgba(15, 23, 30, 0.08);
  --shadow-card-hover: 0 14px 36px rgba(15, 23, 30, 0.12);
  --color-danger: #f54c7a;

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

:root:not([data-theme="light"]) {
  --color-bg: #1a1a1e;
  --color-fg: #f5f6f7;
  --color-muted: #a2a8b0;
  --color-primary: #8774e1;
  --color-primary-fg: #ffffff;
  --color-card: #232328;
  --color-border: rgba(255, 255, 255, 0.08);
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-card-hover: 0 14px 36px rgba(0, 0, 0, 0.45);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --color-bg: #ffffff;
    --color-fg: #2f3a40;
    --color-muted: #6b7680;
    --color-primary: #33c3f0;
    --color-primary-fg: #04222c;
    --color-card: #f7f9fb;
    --color-border: rgba(15, 23, 30, 0.08);
    --shadow-card: 0 10px 30px rgba(15, 23, 30, 0.08);
    --shadow-card-hover: 0 14px 36px rgba(15, 23, 30, 0.12);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  padding: 0;
  margin: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-fg);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 64px;
}

a {
  color: inherit;
}

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

/* --- header --- */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 0;
}

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo .accent {
  color: var(--color-primary);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-fg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  transition: box-shadow 0.15s ease, transform 0.1s ease;
}

.theme-toggle:hover {
  box-shadow: var(--shadow-card);
}

.theme-toggle:active {
  transform: scale(0.94);
}

/* --- hero / resolve form --- */

.hero {
  text-align: center;
  padding: 56px 0 8px;
}

.hero-title {
  font-size: clamp(1.9rem, 5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.hero-title .accent {
  color: var(--color-primary);
}

.hero-subtitle {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin: 0 auto 32px;
  max-width: 480px;
}

.resolve-form {
  display: flex;
  gap: 10px;
  max-width: 560px;
  margin: 0 auto;
}

@media (max-width: 560px) {
  .resolve-form {
    flex-direction: column;
  }
}

.input {
  flex: 1;
  font-family: inherit;
  font-size: 1rem;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-fg);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.input::placeholder {
  color: var(--color-muted);
}

.input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.btn {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-fg);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.1s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  box-shadow: var(--shadow-card);
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
  box-shadow: none;
}

.btn-primary {
  background: var(--color-primary);
  border-color: transparent;
  color: var(--color-primary-fg);
}

.btn-block {
  width: 100%;
}

.hero-secondary {
  margin-top: 18px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.hero-secondary a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}

.hero-secondary a:hover {
  text-decoration: underline;
}

/* --- result card --- */

.result {
  max-width: 640px;
  margin: 36px auto 0;
  text-align: left;
}

.result[hidden] {
  display: none;
}

.result-error {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-danger);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  color: var(--color-fg);
}

.spinner {
  width: 28px;
  height: 28px;
  margin: 24px auto;
  border-radius: 999px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  animation: spin 0.7s linear infinite;
}

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

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 20px;
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
}

.card video,
.card audio,
.card img {
  border-radius: var(--radius-md);
  width: 100%;
}

.card video {
  max-height: 560px;
  background: #000;
}

.card audio {
  margin-top: 12px;
}

.card-title {
  font-weight: 700;
  font-size: 1.05rem;
  margin: 14px 0 4px;
}

.card-description {
  color: var(--color-muted);
  font-size: 0.92rem;
  white-space: pre-line;
  margin: 0 0 8px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-description.expanded {
  -webkit-line-clamp: unset;
  overflow: visible;
}

.card-description-toggle {
  background: none;
  border: none;
  padding: 0;
  margin: 0 0 16px;
  color: var(--color-primary);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-block;
}

.card-description-toggle:hover {
  text-decoration: underline;
}

/* --- галерея: свайп-карусель как в TikTok/Instagram, точки вместо превью --- */

.gallery-carousel {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  max-width: 420px;
  margin: 0 auto;
}

.gallery-track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.gallery-track::-webkit-scrollbar {
  display: none;
}

.gallery-slide {
  flex: 0 0 100%;
  scroll-snap-align: center;
  scroll-snap-stop: always;
  aspect-ratio: 4 / 5;
}

.gallery-slide img,
.gallery-slide video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 0;
}

.gallery-save {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: none;
  background: rgba(20, 20, 24, 0.55);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: background-color 0.15s ease, transform 0.1s ease;
  z-index: 2;
}

.gallery-save:hover {
  background: rgba(20, 20, 24, 0.8);
}

.gallery-save:active {
  transform: scale(0.92);
}

.gallery-save svg {
  width: 18px;
  height: 18px;
}

.gallery-dots {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 2;
}

.gallery-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background-color 0.15s ease, width 0.15s ease;
}

.gallery-dot.active {
  background: #fff;
  width: 16px;
}

.card-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.card-actions .btn {
  flex: 1;
  min-width: 140px;
}

/* --- sections: how it works / advantages --- */

.section {
  margin-top: 72px;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 800;
  text-align: center;
  margin: 0 0 28px;
  letter-spacing: -0.01em;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

@media (max-width: 720px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

.step-card {
  text-align: center;
}

.step-card .step-num {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--color-primary);
  color: var(--color-primary-fg);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
}

.step-card p {
  margin: 0;
  color: var(--color-fg);
  font-size: 0.95rem;
}

.advantage-card {
  text-align: center;
}

.advantage-card .emoji {
  font-size: 2rem;
  margin-bottom: 10px;
}

.advantage-card h4 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

/* --- misc pages (404 / redirect stub) --- */

.center-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}