:root {
  --ink: #0b1231;
  --ink-soft: #29304f;
  --teal: #00c2b2;
  --teal-dark: #008d86;
  --mint: #e6fbf8;
  --paper: #ffffff;
  --cloud: #f4f7f9;
  --line: #dce5eb;
  --coral: #ff6b6b;
  --gold: #f4b43f;
  --shadow: 0 20px 60px rgba(11, 18, 49, 0.16);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Poppins", "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  width: min(var(--max), calc(100% - 32px));
  margin: 14px auto 0;
  padding: 10px 12px 10px 16px;
  color: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  background: rgba(11, 18, 49, 0.42);
  backdrop-filter: blur(18px);
}

.site-header.scrolled {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(11, 18, 49, 0.1);
  box-shadow: 0 12px 40px rgba(11, 18, 49, 0.12);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: max-content;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-word {
  font-size: 25px;
  line-height: 1;
}

.brand-word span {
  color: var(--teal);
}

.brand-mark {
  width: 15px;
  height: 15px;
  border: 4px solid currentColor;
  border-top-color: var(--teal);
  border-radius: 50%;
}

.nav {
  justify-self: center;
  display: flex;
  gap: 4px;
}

.nav a,
.header-cta {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 700;
}

.nav a:hover,
.header-cta:hover {
  background: rgba(0, 194, 178, 0.16);
}

.header-cta {
  color: var(--ink);
  background: var(--paper);
}

.site-header.scrolled .header-cta {
  color: var(--paper);
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 82vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 114px 0 56px;
  color: var(--paper);
}

.hero-media {
  position: absolute;
  inset: 0;
  background-image: url("assets/tickoflow-hero.png");
  background-size: cover;
  background-position: center right;
  transform: scale(1.01);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(11, 18, 49, 0.9) 0%, rgba(11, 18, 49, 0.66) 34%, rgba(11, 18, 49, 0.18) 68%, rgba(11, 18, 49, 0.08) 100%),
    linear-gradient(180deg, rgba(11, 18, 49, 0.18), rgba(11, 18, 49, 0.5));
}

.hero-content {
  position: relative;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 680px;
  font-size: clamp(54px, 10vw, 124px);
  line-height: 0.9;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 610px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
}

.hero-actions,
.row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 800;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
  color: var(--ink);
  background: var(--teal);
}

.btn-secondary {
  color: var(--paper);
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.12);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 150px));
  gap: 10px;
  max-width: 510px;
  margin-top: 38px;
}

.hero-metrics div {
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.11);
  backdrop-filter: blur(10px);
}

.hero-metrics strong {
  display: block;
  font-size: 22px;
}

.hero-metrics span {
  display: block;
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 11px;
  line-height: 1.35;
}

.section {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 86px 0;
}

.section-head {
  max-width: 820px;
  margin-bottom: 34px;
}

.section-head.compact {
  max-width: 720px;
}

.section-head h2,
.demo h2 {
  margin: 0;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.03;
  letter-spacing: 0;
}

.section-head p:not(.eyebrow),
.demo p,
.system-detail p,
.flow-card p,
.audience-grid p {
  color: var(--ink-soft);
  line-height: 1.7;
}

.system-switcher {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.system-tab {
  min-height: 58px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  cursor: pointer;
  font-weight: 800;
  text-align: left;
}

.system-tab.active {
  color: var(--paper);
  border-color: var(--ink);
  background: var(--ink);
}

.tab-icon {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--mint);
  font-size: 12px;
}

.system-tab.active .tab-icon {
  background: var(--teal);
}

.system-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(330px, 0.95fr);
  gap: 16px;
}

.system-detail,
.live-panel,
.flow-card,
.calculator,
.audience-grid article,
.demo {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 14px 50px rgba(11, 18, 49, 0.07);
}

.system-detail {
  min-height: 380px;
  padding: clamp(22px, 4vw, 42px);
}

.system-kicker,
.flow-tag,
.audience-grid span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 9px;
  color: var(--teal-dark);
  border: 1px solid rgba(0, 194, 178, 0.32);
  border-radius: var(--radius);
  background: var(--mint);
  font-size: 12px;
  font-weight: 800;
}

.system-detail h3,
.flow-card h3,
.audience-grid h3 {
  margin: 18px 0 12px;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.08;
}

.feature-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 28px;
  color: var(--ink-soft);
  font-weight: 600;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: inset 0 0 0 5px var(--mint);
}

.live-panel {
  min-height: 380px;
  padding: 24px;
  color: var(--paper);
  background: var(--ink);
  overflow: hidden;
}

.panel-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.panel-top span {
  color: rgba(255, 255, 255, 0.65);
}

.mini-calendar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin: 24px 0;
}

.mini-calendar span {
  aspect-ratio: 1.18;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.12);
}

.mini-calendar .busy {
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(0, 194, 178, 0.14);
}

.panel-note {
  min-height: 86px;
  display: flex;
  align-items: center;
  padding: 18px;
  border-radius: var(--radius);
  color: rgba(255, 255, 255, 0.84);
  background: rgba(255, 255, 255, 0.1);
  line-height: 1.55;
}

.workflow {
  width: 100%;
  max-width: none;
  padding-left: max(16px, calc((100% - var(--max)) / 2));
  padding-right: max(16px, calc((100% - var(--max)) / 2));
  background: var(--cloud);
}

.workflow-grid {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 16px;
}

.workflow-steps {
  display: grid;
  gap: 10px;
}

.flow-step {
  min-height: 76px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  cursor: pointer;
  text-align: left;
}

.flow-step.active {
  border-color: var(--teal);
  box-shadow: inset 4px 0 0 var(--teal), 0 12px 30px rgba(0, 194, 178, 0.14);
}

.flow-step span {
  display: block;
  font-weight: 800;
}

.flow-step small {
  color: var(--ink-soft);
  font-size: 12px;
}

.flow-card {
  min-height: 420px;
  padding: clamp(22px, 4vw, 46px);
}

.flow-preview {
  display: grid;
  gap: 10px;
  max-width: 520px;
  margin-top: 32px;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--cloud);
}

.preview-line {
  min-height: 38px;
  display: flex;
  align-items: center;
  padding: 0 12px;
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink-soft);
}

.preview-line.strong {
  color: var(--ink);
  font-weight: 800;
}

.preview-status {
  width: fit-content;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: var(--radius);
  color: var(--paper);
  background: var(--coral);
  font-size: 13px;
  font-weight: 800;
}

.calculator {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 20px;
  padding: clamp(18px, 3vw, 30px);
}

.controls {
  display: grid;
  gap: 22px;
}

.controls label {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px 18px;
  align-items: center;
  color: var(--ink-soft);
  font-weight: 700;
}

.controls input {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--teal);
}

.controls strong {
  color: var(--ink);
  font-size: 20px;
}

.impact-results {
  display: grid;
  gap: 10px;
}

.result {
  min-height: 110px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
}

.result.accent {
  background: var(--teal-dark);
}

.result.warm {
  background: #8d4a00;
}

.result span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.result strong {
  margin-top: 6px;
  font-size: 34px;
  line-height: 1;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.audience-grid article {
  padding: 24px;
}

.audience-grid h3 {
  font-size: 24px;
}

.demo {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto 60px;
  padding: clamp(24px, 5vw, 48px);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
  color: var(--paper);
  background: var(--ink);
  box-shadow: var(--shadow);
}

.demo p {
  max-width: 690px;
  color: rgba(255, 255, 255, 0.76);
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    display: none;
  }

  .hero {
    min-height: 86vh;
    align-items: flex-end;
  }

  .hero-media {
    background-position: 62% center;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(11, 18, 49, 0.16) 0%, rgba(11, 18, 49, 0.58) 44%, rgba(11, 18, 49, 0.94) 100%),
      linear-gradient(90deg, rgba(11, 18, 49, 0.58), rgba(11, 18, 49, 0.2));
  }

  .hero-metrics,
  .system-switcher,
  .system-stage,
  .workflow-grid,
  .calculator,
  .audience-grid,
  .demo {
    grid-template-columns: 1fr;
  }

  .system-stage {
    gap: 12px;
  }

  .workflow {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .demo {
    align-items: start;
  }
}

@media (max-width: 560px) {
  .site-header {
    width: calc(100% - 20px);
    margin-top: 10px;
    padding: 8px 10px;
  }

  .brand-word {
    font-size: 21px;
  }

  .header-cta {
    min-height: 34px;
    padding: 0 10px;
    font-size: 12px;
  }

  .hero {
    min-height: 88vh;
    padding-bottom: 34px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .hero-actions {
    gap: 8px;
  }

  .btn {
    width: 100%;
  }

  .hero-metrics {
    gap: 8px;
  }

  .section {
    padding: 64px 0;
  }

  .section-head h2,
  .demo h2 {
    font-size: 32px;
  }

  .system-detail,
  .live-panel,
  .flow-card {
    min-height: auto;
  }

  .flow-preview {
    padding: 12px;
  }
}