/* ZeroIdle — dark industrial, electric orange accent, Syne + DM Sans */
:root {
  --bg: #0d0d0d;
  --bg-elevated: #141414;
  --bg-card: #1c1c1c;
  --bg-card-featured: #1f1a16;
  --fg: #f2f0ed;
  --fg-muted: #7a7571;
  --fg-dim: #4a4644;
  --accent: #ff6b35;
  --accent-dim: rgba(255, 107, 53, 0.10);
  --accent-glow: rgba(255, 107, 53, 0.20);
  --accent-border: rgba(255, 107, 53, 0.30);
  --border: #252525;
  --border-light: #2e2e2e;
  --radius: 10px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ---- NAVIGATION ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 24px;
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
}

.logo-mark {
  font-size: 20px;
  color: var(--accent);
  line-height: 1;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  padding: 8px 18px;
  border-radius: 100px;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-cta:hover {
  background: var(--accent);
  color: #0d0d0d;
  border-color: var(--accent);
}

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 140px 24px 100px;
  position: relative;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.35;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 0%, transparent 100%);
}

.hero-glow {
  position: absolute;
  top: 15%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 65%);
  pointer-events: none;
  border-radius: 50%;
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  background: var(--accent-dim);
  padding: 7px 16px;
  border-radius: 100px;
  margin-bottom: 36px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.04em;
  margin-bottom: 28px;
  color: var(--fg);
}

.hero h1 .highlight {
  color: var(--accent);
}

.hero-sub {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--fg-muted);
  max-width: 580px;
  line-height: 1.75;
  font-weight: 300;
  margin-bottom: 44px;
}

/* ---- WAITLIST FORM ---- */
.hero-actions {
  margin-bottom: 60px;
}

.waitlist-form {
  display: flex;
  gap: 0;
  max-width: 460px;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-elevated);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.waitlist-form:focus-within {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.waitlist-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 14px 18px;
  min-width: 0;
}

.waitlist-input::placeholder {
  color: var(--fg-dim);
}

.waitlist-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #0d0d0d;
  border: none;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  padding: 14px 20px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s ease, opacity 0.2s ease;
  letter-spacing: 0.01em;
}

.waitlist-btn:hover:not(:disabled) {
  background: #ff8558;
}

.waitlist-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.waitlist-note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--fg-dim);
}

.waitlist-success {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  padding: 16px 0;
}

/* ---- HERO STATS ---- */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--fg);
  line-height: 1;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border-light);
  flex-shrink: 0;
}

/* ---- SECTION SHARED ---- */
.section-label {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

/* ---- PROBLEM SECTION ---- */
.problem {
  padding: 120px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.problem-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 60px;
  max-width: 680px;
  color: var(--fg);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.problem-card {
  background: var(--bg-card);
  padding: 40px 32px;
  transition: background 0.2s ease;
}

.problem-card:hover {
  background: #212121;
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: 20px;
  line-height: 1;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.problem-card p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ---- HOW IT WORKS ---- */
.how {
  padding: 120px 24px;
  border-top: 1px solid var(--border);
}

.how-inner {
  max-width: 900px;
  margin: 0 auto;
}

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 72px;
  max-width: 620px;
}

.how-steps {
  display: flex;
  flex-direction: column;
}

.how-step {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 28px;
  padding: 44px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
  transition: padding-left 0.2s ease;
}

.how-step:first-child {
  border-top: 1px solid var(--border);
}

.how-step:hover {
  padding-left: 8px;
}

.step-num {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--fg-dim);
  padding-top: 4px;
}

.how-step:hover .step-num {
  -webkit-text-stroke-color: var(--accent);
  transition: -webkit-text-stroke-color 0.2s ease;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--fg);
  letter-spacing: -0.01em;
  padding-top: 6px;
}

.step-content p {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
  font-weight: 300;
}

/* ---- SEGMENTS ---- */
.segments {
  padding: 120px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.segments-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.segments h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 60px;
  max-width: 700px;
}

.segments-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.segment-card {
  background: var(--bg-card);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.segment-card.segment-featured {
  background: var(--bg-card-featured);
  border-left: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
  margin-left: -1px;
  margin-right: -1px;
  position: relative;
  z-index: 1;
}

.segment-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  padding: 4px 12px;
  border-radius: 100px;
  width: fit-content;
}

.segment-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--fg);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.segment-card p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.65;
  font-weight: 300;
}

.segment-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.segment-list li {
  font-size: 0.88rem;
  color: var(--fg-muted);
  padding-left: 18px;
  position: relative;
}

.segment-list li::before {
  content: '\2192';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
  top: 1px;
}

/* ---- CLOSING ---- */
.closing {
  padding: 140px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.closing::before {
  content: '';
  position: absolute;
  bottom: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.closing-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}

.closing h2 .highlight {
  color: var(--accent);
}

.closing p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.75;
  font-weight: 300;
  margin-bottom: 44px;
}

.closing-form-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.closing-form-wrap .waitlist-form {
  max-width: 420px;
  width: 100%;
}

/* ---- FOOTER ---- */
footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-copy {
  font-size: 13px;
  color: var(--fg-dim);
  letter-spacing: 0.02em;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .problem-grid,
  .segments-grid {
    grid-template-columns: 1fr;
  }

  .segment-card.segment-featured {
    border-left: none;
    border-right: none;
    border-top: 2px solid var(--accent);
    border-bottom: 2px solid var(--accent);
    margin: -1px 0;
  }

  .hero-stats {
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 100px 20px 80px;
    min-height: auto;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 10vw, 3.2rem);
  }

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

  .step-num {
    font-size: 2rem;
  }

  .waitlist-form {
    flex-direction: column;
    border-radius: var(--radius);
  }

  .waitlist-input {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
  }

  .waitlist-btn {
    justify-content: center;
    padding: 14px 20px;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 16px;
  }

  .stat-divider {
    display: none;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }

  .nav {
    padding: 16px 20px;
  }
}