/* ============================================
   УТРЕННИЙ БРИФ — Landing Page
   Aesthetic: Light, warm, editorial-clean
   Font: Onest (geometric, great for Russian)
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Warm light palette */
  --bg: #FAFAF7;
  --bg-alt: #FFFFFF;
  --surface: #FFFFFF;
  --surface-hover: #F5F5F0;
  --border: #E8E6E1;
  --border-light: #F0EEE9;

  /* Text hierarchy */
  --text: #1A1A18;
  --text-secondary: #5C5C58;
  --text-muted: #9C9C96;

  /* Accent — warm amber/orange (sunrise energy) */
  --accent: #E8720C;
  --accent-light: #FFF3E8;
  --accent-hover: #D06000;

  /* Telegram blue for auth button context */
  --telegram: #229ED9;

  /* Supplementary */
  --green: #2D9D4E;
  --green-light: #EEFAF1;
  --red-light: #FFF0EE;
  --red: #D94830;

  /* Layout */
  --max-w: 1120px;
  --section-py: 96px;
  --radius: 16px;
  --radius-sm: 10px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Onest', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---- NAV ---- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 247, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-icon {
  font-size: 1.4rem;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
}

/* ---- HERO ---- */

.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 32px 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--text);
}

.hero-accent {
  color: var(--accent);
  position: relative;
}

.hero-accent::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--accent);
  opacity: 0.18;
  border-radius: 3px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-top: 20px;
  max-width: 440px;
  line-height: 1.65;
}

.hero-list {
  list-style: none;
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hero-list li {
  font-size: 1.05rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-list-icon {
  font-size: 1.15rem;
  flex-shrink: 0;
}

.hero-cta {
  margin-top: 36px;
}

.btn-telegram {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #229ED9;
  color: #fff;
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
  margin-bottom: 12px;
}

.btn-telegram:hover {
  background: #1a8ac2;
  transform: translateY(-1px);
}

.btn-telegram-icon {
  flex-shrink: 0;
}

.hero-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.hero-phone {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-phone-img {
  width: 100%;
  max-width: 380px;
  height: auto;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.12));
  animation: phoneFloat 6s ease-in-out infinite;
}

@keyframes phoneFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ---- SECTIONS ---- */

.section {
  padding: var(--section-py) 0;
}

.section--light {
  background: var(--bg-alt);
}

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

.section-label {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-title--left {
  text-align: left;
  margin: 0 0 20px;
}

.section-body {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
}

.section-body--muted {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 8px;
}

/* ---- STEPS ---- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.section--light .step {
  background: var(--bg);
}

.step:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 800;
  font-size: 1.15rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.steps-footnote {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---- FEATURES GRID ---- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ---- SPLIT SECTION (Calendar) ---- */

.section-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.calendar-visual {
  display: flex;
  justify-content: center;
}

.calendar-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 340px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}

.section--light .calendar-card {
  background: var(--bg);
}

.calendar-card-header {
  font-weight: 700;
  font-size: 0.95rem;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.calendar-card-item {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.calendar-card-item + .calendar-card-item {
  border-top: 1px solid var(--border-light);
}

.calendar-time {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--accent);
  min-width: 42px;
  font-variant-numeric: tabular-nums;
}

/* ---- PROBLEM / SOLUTION ---- */

.problem-solution {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.problem-block,
.solution-block {
  border-radius: var(--radius);
  padding: 40px 36px;
}

.problem-block {
  background: var(--red-light);
  border: 1px solid #F5D5D0;
}

.solution-block {
  background: var(--green-light);
  border: 1px solid #C8E8D0;
}

.section-label--problem {
  color: var(--red);
}

.section-label--solution {
  color: var(--green);
}

.problem-block h3,
.solution-block h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.problem-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.problem-list li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
}

.problem-list li::before {
  content: '×';
  position: absolute;
  left: 0;
  color: var(--red);
  font-weight: 700;
}

.problem-result {
  font-size: 0.9rem;
  color: var(--red);
  font-weight: 600;
  margin-top: 8px;
}

.solution-tagline {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--green);
  margin-top: 4px;
}

/* ---- AUDIENCE ---- */

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.audience-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  transition: transform 0.3s ease;
}

.section--light .audience-card {
  background: var(--bg);
}

.audience-card:hover {
  transform: translateY(-3px);
}

.audience-emoji {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 12px;
}

.audience-card p {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ---- ADVANTAGES ---- */

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

.advantage {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 24px 20px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.3s ease;
}

.advantage:hover {
  transform: translateY(-2px);
}

.advantage-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.advantage h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.advantage p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ---- CTA SECTION ---- */

.section--cta {
  background: var(--text);
  color: var(--bg);
  text-align: center;
}

.cta-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta-subtitle {
  font-size: 1.1rem;
  color: #B0B0A8;
  max-width: 480px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.cta-login {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}

.cta-fine {
  font-size: 0.82rem;
  color: #787870;
}

.cta-returning {
  font-size: 0.85rem;
  color: #787870;
  margin-top: 12px;
}

.cta-returning a {
  color: var(--accent);
  text-decoration: underline;
}

.btn-telegram-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #229ED9;
  color: #fff;
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
  cursor: pointer;
  border: none;
}

.btn-telegram-cta:hover {
  background: #1a8ac2;
  transform: translateY(-1px);
}

.btn-telegram-cta svg {
  flex-shrink: 0;
}

/* ---- FAQ ---- */

.faq-list {
  max-width: 640px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item summary {
  padding: 20px 0;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color 0.2s;
}

.faq-item summary:hover {
  color: var(--accent);
}

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 0 20px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---- FOOTER ---- */

.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---- LOGGED-IN STATE ---- */

.welcome {
  display: none;
  max-width: 500px;
  margin: 0 auto;
  padding: 120px 24px;
  text-align: center;
}

.welcome.visible {
  display: block;
}

.welcome h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.welcome p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 16px 36px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* Keep old .btn class working for dev mode button */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
}

.btn:hover {
  background: var(--accent-hover);
}

/* ---- UTILITY ---- */

.hidden {
  display: none !important;
}

/* ---- SCROLL ANIMATIONS ---- */

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- RESPONSIVE ---- */

@media (max-width: 900px) {
  :root {
    --section-py: 72px;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 48px 24px 40px;
    text-align: center;
    gap: 40px;
  }

  .hero-title {
    font-size: 2.6rem;
  }

  .hero-subtitle {
    margin: 16px auto 0;
  }

  .hero-list {
    align-items: center;
  }

  .hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-phone {
    order: -1;
  }

  .hero-phone-img {
    max-width: 280px;
  }

  .steps {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto 32px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .section-split {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .section-title--left {
    text-align: center;
  }

  .section-body {
    text-align: center;
    margin: 0 auto;
  }

  .section-body--muted {
    text-align: center;
  }

  .problem-solution {
    grid-template-columns: 1fr;
  }

  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .advantages {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .section-inner {
    padding: 0 24px;
  }

  .nav-inner {
    padding: 14px 24px;
  }

  .nav-links {
    gap: 20px;
  }

  .section-title {
    font-size: 1.75rem;
    margin-bottom: 36px;
  }

  .cta-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-phone-img {
    max-width: 220px;
  }

  .nav-links {
    display: none;
  }

  .audience-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .audience-card {
    padding: 24px 12px;
  }

  .problem-block,
  .solution-block {
    padding: 28px 24px;
  }
}