/* =============================================
   PomoBorrow — Landing Page
   Pure CSS, no frameworks, system fonts only
   ============================================= */

:root {
  --bg: #000;
  --text: #fff;
  --muted: #666;
  --accent: #3B82F6;
  --red: #EF4444;
  --gold: #D4A843;
  --work: #3B82F6;
  --gym: #F97316;
  --leisure: #10B981;
  --sleep: #1E293B;
  --commute: #8B5CF6;
  --eating: #EAB308;
}

/* ---- Reset & Base ---- */

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

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.8;
}

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

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Reveal Animation ---- */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Gradient Text ---- */

.gradient-text {
  background: linear-gradient(135deg, var(--accent), #A78BFA, var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---- Section Title ---- */

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

/* =============================================
   OPENING: THE QUESTION
   ============================================= */

.opening {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.opening-content {
  text-align: center;
  padding: 0 24px;
  max-width: 800px;
}

/* Typewriter */

.typewriter {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  overflow: hidden;
  border-right: 2px solid var(--muted);
  white-space: nowrap;
  width: 0;
  max-width: 100%;
  margin: 0 auto;
  animation: typing 2.8s steps(44) 0.5s forwards, blink 0.75s step-end infinite;
}

@keyframes typing {
  to { width: 100%; }
}

@keyframes blink {
  50% { border-color: transparent; }
}

/* Follow-up text */

.opening-follow {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--muted);
  margin-top: 1.5rem;
  opacity: 0;
  transition: opacity 1s ease;
}

.opening-follow.visible {
  opacity: 1;
}

/* Scroll indicator */

.scroll-indicator {
  margin-top: 4rem;
  opacity: 0;
  transition: opacity 1s ease;
}

.scroll-indicator.visible {
  opacity: 1;
}

.scroll-arrow {
  display: inline-block;
  font-size: 1.5rem;
  color: var(--muted);
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

/* =============================================
   HERO: THE HOURGLASS
   ============================================= */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 24px;
}

.hero-inner {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hourglass-container {
  position: relative;
  overflow: hidden;
}

.hourglass-img {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  display: block;
  filter: brightness(0.9) contrast(1.1);
  transition: transform 0.1s linear;
  will-change: transform;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.hero-quote {
  border: none;
  padding: 0;
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  line-height: 1.8;
  color: #ccc;
}

.hero-quote strong {
  color: var(--text);
}

.hero-quote em {
  color: var(--red);
  font-style: normal;
}

.hero-quote-second .gradient-text {
  font-weight: 700;
}

/* =============================================
   THE REALITY
   ============================================= */

.reality {
  padding: 8rem 0;
}

.reality-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: start;
}

.reality-divider {
  width: 1px;
  background: linear-gradient(to bottom, transparent, #333, transparent);
  min-height: 200px;
  align-self: stretch;
}

.reality-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.reality-label--think {
  color: var(--muted);
}

.reality-label--actual {
  color: var(--red);
}

.reality-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.reality-quote {
  color: var(--muted);
  font-style: italic;
  font-size: 1.1rem;
}

.reality-list--actual li {
  color: #ccc;
  font-size: 1rem;
  line-height: 1.7;
}

.reality-stat {
  color: var(--text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.reality-aside {
  display: block;
  color: var(--muted);
  font-style: italic;
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

/* =============================================
   THE SOLUTION
   ============================================= */

.solution {
  padding: 8rem 0;
}

/* Day ring */

.ring-wrapper {
  text-align: center;
  margin-bottom: 3rem;
}

.day-ring {
  width: 260px;
  height: 260px;
  margin: 0 auto 1.5rem;
}

.ring-segment {
  fill: none;
  stroke-width: 24;
  stroke-linecap: butt;
  opacity: 0;
  transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.ring-segment.visible {
  opacity: 1;
}

.ring-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 1.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.ring-legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

/* Solution description */

.solution-desc {
  text-align: center;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: #ccc;
  max-width: 640px;
  margin: 0 auto 3rem;
  line-height: 1.8;
}

/* Sensor icons */

.sensors {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.sensor-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.sensor-icon {
  font-size: 2rem;
}

.sensor-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* =============================================
   INTERACTIVE DEMO
   ============================================= */

.demo {
  padding: 8rem 0;
}

.timeline {
  display: flex;
  height: 64px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  position: relative;
}

.timeline-block {
  position: relative;
  transition: filter 0.2s, transform 0.2s;
  min-width: 2px;
}

.timeline-block:hover {
  filter: brightness(1.3);
  transform: scaleY(1.1);
  z-index: 2;
}

.timeline-hours {
  display: flex;
  justify-content: space-between;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--muted);
}

/* Tooltip */

.timeline-tooltip {
  position: fixed;
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.85rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 100;
  max-width: 280px;
  line-height: 1.5;
}

.timeline-tooltip.active {
  opacity: 1;
}

.tooltip-activity {
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.tooltip-time {
  color: var(--muted);
  font-size: 0.8rem;
}

.tooltip-detail {
  color: #aaa;
  margin-top: 4px;
}

.demo-note {
  text-align: center;
  color: var(--muted);
  font-size: 1rem;
  margin-top: 2rem;
}

/* =============================================
   THE ANSWER
   ============================================= */

.answer-section {
  padding: 8rem 0;
  text-align: center;
}

.answer-content {
  max-width: 600px;
  margin: 0 auto;
}

.answer-question {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 2rem;
}

.answer-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s ease 0.5s, transform 1s ease 0.5s;
}

.answer-content.visible .answer-reveal {
  opacity: 1;
  transform: translateY(0);
}

.answer-activity {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.answer-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  display: inline-block;
}

.answer-label {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}

.answer-detail {
  font-size: 1.15rem;
  color: #ccc;
  margin-bottom: 0.25rem;
}

.answer-detail-sub {
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 2.5rem;
}

.answer-closer {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--text);
  font-weight: 600;
  opacity: 0;
  transition: opacity 1s ease 1.2s;
}

.answer-content.visible .answer-closer {
  opacity: 1;
}

/* =============================================
   PRIVACY
   ============================================= */

.privacy-section {
  padding: 8rem 0;
}

.privacy-stats {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-bottom: 2rem;
}

.privacy-stat {
  text-align: center;
}

.privacy-number {
  display: block;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), #A78BFA);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.privacy-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.privacy-desc {
  text-align: center;
  color: #ccc;
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto;
}

/* =============================================
   HOW IT LEARNS
   ============================================= */

.learns {
  padding: 8rem 0;
}

.learns-phases {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
}

.learns-phase {
  text-align: center;
  max-width: 240px;
  padding: 0 1.5rem;
}

.phase-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}

.phase-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.phase-desc {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.6;
}

.learns-connector {
  width: 60px;
  height: 2px;
  background: linear-gradient(to right, var(--accent), #A78BFA);
  margin-top: 24px;
  flex-shrink: 0;
}

/* =============================================
   WAITLIST
   ============================================= */

.waitlist {
  padding: 8rem 0;
}

.waitlist-form {
  display: flex;
  max-width: 480px;
  margin: 0 auto 1rem;
  gap: 0;
}

.waitlist-input {
  flex: 1;
  padding: 14px 18px;
  border: 1px solid #333;
  border-right: none;
  border-radius: 8px 0 0 8px;
  background: #111;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.waitlist-input:focus {
  border-color: var(--accent);
}

.waitlist-input::placeholder {
  color: #555;
}

.waitlist-btn {
  padding: 14px 24px;
  background: var(--accent);
  color: var(--text);
  border: none;
  border-radius: 0 8px 8px 0;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
}

.waitlist-btn:hover {
  background: #2563EB;
}

.waitlist-success {
  text-align: center;
  color: var(--leisure);
  font-size: 1rem;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 0.5s, max-height 0.5s;
}

.waitlist-success.show {
  opacity: 1;
  max-height: 3rem;
}

.waitlist-links {
  text-align: center;
  margin-top: 2rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.waitlist-link {
  color: var(--accent);
}

.waitlist-divider {
  margin: 0 0.75rem;
  color: #333;
}

.waitlist-badge {
  color: var(--muted);
}

/* =============================================
   FOOTER
   ============================================= */

.footer {
  padding: 3rem 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid #111;
}

.footer a {
  color: var(--muted);
}

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

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .hourglass-img {
    max-width: 320px;
  }

  .reality-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .reality-divider {
    width: 100%;
    height: 1px;
    min-height: auto;
  }

  .learns-phases {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }

  .learns-connector {
    width: 2px;
    height: 40px;
    margin: 0;
  }

  .privacy-stats {
    gap: 2rem;
  }

  .timeline {
    height: 48px;
  }

  .waitlist-form {
    flex-direction: column;
    gap: 0.5rem;
  }

  .waitlist-input {
    border-right: 1px solid #333;
    border-radius: 8px;
  }

  .waitlist-btn {
    border-radius: 8px;
  }

  .typewriter {
    white-space: normal;
    animation: fade-in 1.5s ease 0.3s forwards;
    border-right: none;
    width: auto;
  }

  @keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
  }
}

@media (max-width: 480px) {
  .sensors {
    gap: 1.25rem;
  }

  .sensor-icon {
    font-size: 1.5rem;
  }

  .privacy-stats {
    flex-direction: column;
    gap: 1.5rem;
  }
}