/*
 * PomodoroApp — автономный лендинг
 * Палитра как в приложении: тёмный фон + оранжевый акцент (и зелёный как вторичный на акцентах).
 */

:root {
  --bg-deep: #121212;
  --bg-elevated: #1a1a1a;
  --bg-card: #252525;
  --text: #f5f5f5;
  --muted: #a8a8a8;
  --border: rgba(255, 255, 255, 0.1);
  /* Оранжевый акцент — как FAB, прогресс и навигация на скриншотах */
  --accent: #ff9f1c;
  --accent-deep: #e8890b;
  --accent-glow: rgba(255, 159, 28, 0.4);
  /* Зелёный — вторая тема акцента в приложении */
  --accent-green: #4cd964;
  --cream: #ffffff;
  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "Literata", "Georgia", serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-deep: #f4f0fa;
    --bg-elevated: #ebe4f5;
    --bg-card: #ffffff;
    --text: #1c1c1e;
    --muted: #636366;
    --border: rgba(28, 28, 30, 0.12);
    --accent: #e8830a;
    --accent-deep: #c96f00;
    --accent-glow: rgba(232, 131, 10, 0.28);
    --accent-green: #34c759;
    --cream: #ffffff;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

/* Атмосфера: свечение + зернистость */
.todo-atmosphere {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 55% at 85% 12%, var(--accent-glow), transparent 55%),
    radial-gradient(ellipse 60% 40% at 10% 80%, rgba(255, 159, 28, 0.07), transparent 50%),
    var(--bg-deep);
}

.todo-atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.todo-landing {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.todo-landing-inner {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 1.35rem;
}

.todo-landing-inner--wide {
  max-width: 960px;
}

.todo-landing-top {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-deep) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.todo-landing-brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.03em;
  color: var(--text);
}

.todo-section {
  padding: clamp(2.75rem, 6vw, 4rem) 0;
  animation: todo-rise 0.85s var(--ease-out) backwards;
}

.todo-section:nth-child(1) {
  animation-delay: 0.04s;
}

.todo-section:nth-child(2) {
  animation-delay: 0.1s;
}

.todo-section:nth-child(3) {
  animation-delay: 0.16s;
}

.todo-section:nth-child(4) {
  animation-delay: 0.22s;
}

.todo-section:nth-child(5) {
  animation-delay: 0.28s;
}

.todo-section:nth-child(6) {
  animation-delay: 0.34s;
}

@keyframes todo-rise {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.todo-section--alt {
  background: color-mix(in srgb, var(--bg-elevated) 94%, transparent);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.todo-section-title {
  margin: 0 0 1.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.2vw, 1.75rem);
  line-height: 1.2;
  letter-spacing: -0.04em;
}

/* Галерея скриншотов */
.todo-gallery-intro {
  margin: -0.35rem 0 1.75rem;
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 42rem;
}

.todo-gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
  gap: 1.35rem 1.15rem;
}

@media (min-width: 700px) {
  .todo-gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.todo-gallery-item {
  margin: 0;
}

.todo-gallery-frame {
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow:
    0 20px 40px -22px rgba(0, 0, 0, 0.55),
    0 0 0 1px color-mix(in srgb, var(--text) 6%, transparent);
}

.todo-gallery-frame img {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: middle;
}

.todo-gallery-item figcaption {
  margin-top: 0.55rem;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--muted);
  line-height: 1.35;
}

/* Hero */
.todo-hero {
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(3rem, 8vw, 5rem);
}

.todo-hero-layout {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 820px) {
  .todo-hero-layout {
    grid-template-columns: 1fr minmax(200px, 260px);
    gap: 3rem;
  }
}

.todo-hero-eyebrow {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.todo-hero-title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.65rem, 4.5vw, 2.65rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

.todo-hero-lead {
  margin: 0 0 1.85rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.18rem);
  max-width: 38rem;
}

/* Декоративное кольцо Pomodoro */
.todo-hero-ring-wrap {
  position: relative;
  justify-self: center;
  width: min(220px, 70vw);
  aspect-ratio: 1;
}

.todo-hero-ring {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: conic-gradient(
    from -90deg,
    var(--accent) 0deg,
    var(--accent) 252deg,
    color-mix(in srgb, var(--bg-card) 88%, var(--border)) 252deg,
    color-mix(in srgb, var(--bg-card) 88%, var(--border)) 360deg
  );
  box-shadow:
    inset 0 0 0 3px var(--bg-deep),
    0 24px 48px -12px rgba(0, 0, 0, 0.45),
    0 0 0 1px var(--border);
}

.todo-hero-ring-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 2.75rem);
  letter-spacing: -0.06em;
  color: var(--cream);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

@media (prefers-color-scheme: light) {
  .todo-hero-ring-label {
    color: var(--text);
    text-shadow: none;
  }
}

.todo-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none;
  color: var(--cream);
  background: linear-gradient(165deg, var(--accent), var(--accent-deep));
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--cream) 18%, transparent);
  box-shadow:
    0 4px 20px var(--accent-glow),
    inset 0 1px 0 color-mix(in srgb, var(--cream) 22%, transparent);
  transition:
    transform 0.2s var(--ease-out),
    box-shadow 0.2s ease,
    filter 0.2s ease;
}

.todo-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow:
    0 8px 32px var(--accent-glow),
    inset 0 1px 0 color-mix(in srgb, var(--cream) 28%, transparent);
}

.todo-btn:active {
  transform: translateY(0) scale(0.98);
}

.todo-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.todo-btn--large {
  padding: 0.92rem 1.85rem;
  font-size: 1.05rem;
}

/* About */
.todo-section-pop .todo-prose p:first-child::first-letter {
  font-size: 2.75rem;
  font-weight: 600;
  float: left;
  line-height: 0.85;
  margin-right: 0.45rem;
  font-family: var(--font-display);
  color: var(--accent);
}

.todo-prose p {
  margin: 0 0 1.15rem;
  color: var(--muted);
}

.todo-prose p:last-child {
  margin-bottom: 0;
}

/* Features */
.todo-feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 540px) {
  .todo-feature-list {
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem 1.25rem;
  }
}

.todo-feature-list li {
  padding: 0.85rem 1rem 0.85rem 1rem;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--bg-card) 65%, transparent);
  border-radius: 0 12px 12px 0;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.45;
  border-top: 1px solid var(--border);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  transition: transform 0.2s var(--ease-out), border-color 0.2s ease;
}

.todo-feature-list li:hover {
  transform: translateX(4px);
  border-top-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  border-right-color: color-mix(in srgb, var(--accent) 25%, var(--border));
  border-bottom-color: color-mix(in srgb, var(--accent) 25%, var(--border));
}

/* How */
.todo-steps-flow {
  margin: 0;
  padding: 1.15rem 1.25rem;
  font-size: clamp(0.98rem, 2.2vw, 1.08rem);
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.7;
  color: var(--text);
  border-radius: 14px;
  border: 1px dashed color-mix(in srgb, var(--accent) 55%, var(--border));
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

/* CTA */
.todo-cta {
  padding: clamp(3rem, 9vw, 5rem) 0;
}

.todo-cta .todo-landing-inner {
  max-width: 580px;
}

.todo-cta-panel {
  padding: clamp(2rem, 5vw, 2.75rem);
  text-align: center;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: linear-gradient(
    165deg,
    color-mix(in srgb, var(--bg-card) 92%, var(--accent)),
    var(--bg-elevated)
  );
  box-shadow: 0 28px 60px -24px rgba(0, 0, 0, 0.55);
}

.todo-cta-title {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.8vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.todo-cta-lead {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.06rem;
}

.todo-download-meta {
  margin: 1rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.45;
}

.todo-download-meta code {
  font-size: 0.92em;
  padding: 0.12rem 0.35rem;
  border-radius: 6px;
  background: color-mix(in srgb, var(--bg-deep) 65%, var(--border));
}

/* Footer */
.todo-footer {
  margin-top: auto;
  padding: 1.75rem 0 2.25rem;
  border-top: 1px solid var(--border);
}

.todo-footer-note {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
  text-align: center;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

@media (prefers-reduced-motion: reduce) {
  .todo-section {
    animation: none;
  }

  .todo-btn:hover {
    transform: none;
  }

  .todo-feature-list li:hover {
    transform: none;
  }
}