/* ═══════════════════════════════════════════
   Zenmori Landing Page — Design System
   Theme: Professional (Refined Minimalism)
   ═══════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
  /* Brand colors */
  --color-brand: #2D5F4A;
  --color-cta: #3A7D63;
  --color-sage: #7AAE8A;
  --color-accent: #F4B354;
  --color-text: #374151;
  --color-text-secondary: #6B7280;
  --color-text-muted: #9CA3AF;
  --color-success: #10B981;
  --color-error: #EF4444;

  /* Surfaces */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8F9FA;
  --color-surface: #F3F4F6;
  --color-border: #E5E7EB;

  /* Typography */
  --font-family-ui: 'Outfit', system-ui, -apple-system, sans-serif;

  /* Type scale */
  --text-h1-size: 3.5rem;
  --text-h1-mobile: 2.5rem;
  --text-h2-size: 2.25rem;
  --text-h3-size: 1.25rem;
  --text-body-size: 1rem;
  --text-small-size: 0.875rem;
  --text-caption-size: 0.75rem;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-sm-md: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-xxxl: 64px;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

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

html {
  font-family: var(--font-family-ui);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: var(--text-body-size);
}

input, textarea, select, button,
input::placeholder, textarea::placeholder {
  font-family: inherit;
}

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

a {
  color: var(--color-brand);
  text-decoration: none;
}

/* ── Utility ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

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

.section__title {
  font-size: var(--text-h2-size);
  font-weight: 700;
  color: var(--color-brand);
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.section__subtitle {
  font-size: var(--text-body-size);
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.7;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: var(--text-body-size);
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: inherit;
  text-decoration: none;
  line-height: 1.4;
}

.btn--primary {
  background: var(--color-cta);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-brand);
}

.btn--primary:active {
  transform: scale(0.98);
}

.btn--secondary {
  background: transparent;
  color: var(--color-brand);
  border: 1.5px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-cta);
  color: var(--color-cta);
}

.btn--secondary:active {
  transform: scale(0.98);
}

.btn--large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--text-body-size);
}

/* ── Navigation ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  font-size: var(--text-h3-size);
  font-weight: 700;
  color: var(--color-brand);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav__logo svg,
.nav__logo img,
.footer__logo img {
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav__link {
  color: var(--color-text-secondary);
  font-size: var(--text-small-size);
  font-weight: 500;
}

.nav__link:hover {
  color: var(--color-brand);
}

.nav__cta {
  margin-left: var(--spacing-lg);
}

.nav__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--color-text);
}

.nav__mobile-menu {
  display: none;
}

/* ── Hero ── */
.hero {
  padding: var(--spacing-xxxl) 0;
  position: relative;
  overflow: hidden;
}

.hero__bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.05;
  pointer-events: none;
}

.hero__bg-orb--1 {
  width: 600px;
  height: 600px;
  background: var(--color-brand);
  top: -200px;
  right: -100px;
}

.hero__bg-orb--2 {
  width: 400px;
  height: 400px;
  background: var(--color-sage);
  bottom: -100px;
  left: -100px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxxl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__headline {
  font-size: var(--text-h1-size);
  font-weight: 800;
  color: var(--color-brand);
  line-height: 1.15;
  margin-bottom: var(--spacing-md);
}

.hero__subheadline {
  font-size: var(--text-body-size);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
  max-width: 540px;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero__visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
}

.hero__visual img {
  width: 100%;
  display: block;
}

.hero__play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.15);
  cursor: pointer;
}

.hero__play-btn {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.hero__play-btn svg {
  margin-left: 3px;
}

.hero__caption {
  text-align: center;
  font-size: var(--text-small-size);
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
  font-style: italic;
}

/* ── Problem Section ── */
.problem {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.problem__text {
  font-size: var(--text-body-size);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.problem__closing {
  font-weight: 600;
  color: var(--color-brand);
  font-size: var(--text-body-size);
  margin-top: var(--spacing-lg);
}

/* ── Feature Cards ── */
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
}

.feature-card:hover {
  border-color: color-mix(in srgb, var(--color-cta) 30%, transparent);
  box-shadow: var(--shadow-xl);
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--spacing-md);
  color: var(--color-brand);
}

.feature-card__title {
  font-size: var(--text-h3-size);
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: var(--spacing-sm);
}

.feature-card__quote {
  font-style: italic;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
  font-size: var(--text-small-size);
}

.feature-card__desc {
  color: var(--color-text-secondary);
  font-size: var(--text-small-size);
  line-height: 1.6;
}

/* ── Timeline (How It Works) ── */
.timeline__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxxl);
  align-items: start;
}

.timeline__steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.timeline__step {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  cursor: pointer;
  position: relative;
}

.timeline__step:hover {
  border-color: color-mix(in srgb, var(--color-cta) 30%, transparent);
}

.timeline__step--active {
  border-color: var(--color-cta);
  background: color-mix(in srgb, var(--color-cta) 4%, transparent);
}

.timeline__step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-small-size);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.timeline__step--active .timeline__step-number {
  background: var(--color-cta);
  color: #fff;
}

.timeline__step-title {
  font-size: var(--text-h3-size);
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: var(--spacing-xs);
}

.timeline__step-desc {
  font-size: var(--text-small-size);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Timeline visual panel */
.timeline__visual {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline__visual-panel {
  display: none;
  width: 100%;
}

.timeline__visual-panel--active {
  display: block;
}

/* Waveform (Step 1) */
.waveform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 120px;
}

.waveform__bar {
  width: 4px;
  border-radius: 2px;
  background: var(--color-sage);
  animation: waveform 1.2s ease-in-out infinite alternate;
}

@keyframes waveform {
  0% { height: 15%; }
  100% { height: 85%; }
}

/* Entity cards (Step 2) */
.entity-cards {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.entity-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-sm-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-small-size);
  animation: entitySlideIn 0.3s ease-out;
}

.entity-card__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.entity-card__dot--task { background: var(--color-brand); }
.entity-card__dot--contact { background: var(--color-sage); }
.entity-card__dot--wiki { background: var(--color-cta); }

@keyframes entitySlideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Nudge card (Step 3) */
.nudge-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
}

.nudge-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--spacing-sm);
  background: color-mix(in srgb, var(--color-sage) 15%, transparent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-brand);
}

.nudge-card__title {
  font-size: var(--text-h3-size);
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: var(--spacing-xs);
}

.nudge-card__text {
  font-size: var(--text-small-size);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ── Scenarios ── */
.scenarios__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.scenario-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
}

.scenario-card:hover {
  border-color: color-mix(in srgb, var(--color-cta) 30%, transparent);
  box-shadow: var(--shadow-md);
}

.scenario-card__title {
  font-size: var(--text-h3-size);
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: var(--spacing-sm);
}

.scenario-card__quote {
  font-style: italic;
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: var(--text-small-size);
}

.scenarios__closing {
  text-align: center;
  font-weight: 600;
  color: var(--color-brand);
  margin-top: var(--spacing-xl);
  font-size: var(--text-body-size);
}

/* ── Comparison Section ── */
.comparison__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  max-width: 960px;
  margin: 0 auto;
}

.comparison-card {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  text-align: center;
}

.comparison-card--highlight {
  border-color: var(--color-cta);
  background: color-mix(in srgb, var(--color-cta) 3%, transparent);
}

.comparison-card__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  margin-bottom: var(--spacing-sm);
  font-size: var(--text-h3-size);
  font-weight: 700;
}

.comparison-card__badge--x {
  background: color-mix(in srgb, var(--color-error) 10%, transparent);
  color: var(--color-error);
}

.comparison-card__badge--check {
  background: color-mix(in srgb, var(--color-success) 10%, transparent);
  color: var(--color-success);
}

.comparison-card__title {
  font-size: var(--text-h3-size);
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: var(--spacing-sm);
}

.comparison-card__desc {
  font-size: var(--text-small-size);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.comparison__closing {
  text-align: center;
  font-weight: 600;
  color: var(--color-brand);
  margin-top: var(--spacing-xl);
}

/* ── Knowledge Graph ── */
.graph__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxxl);
  align-items: center;
}

.graph__text {
  max-width: 480px;
}

.graph__text h2 {
  font-size: var(--text-h2-size);
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: var(--spacing-md);
}

.graph__text p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
  font-size: var(--text-body-size);
}

.graph__text strong {
  color: var(--color-brand);
}

.graph__cta {
  margin-top: var(--spacing-lg);
}

.graph__container {
  display: flex;
  align-items: center;
  justify-content: center;
}

.graph__svg {
  width: 100%;
  max-width: 520px;
}

.graph__svg .graph-node {
  cursor: pointer;
}

.graph__svg .graph-node circle {
  transition: stroke-width 0.15s, filter 0.15s;
}

.graph__svg .graph-edge {
  transition: stroke-width 0.15s, stroke 0.15s, filter 0.15s;
}

/* ── Pricing ── */
.pricing__card {
  max-width: 420px;
  margin: 0 auto;
  background: var(--color-bg);
  border: 2px solid var(--color-cta);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xxl);
  text-align: center;
  position: relative;
}

.pricing__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-text);
  font-size: var(--text-caption-size);
  font-weight: 700;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing__price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-brand);
  margin-bottom: var(--spacing-xs);
}

.pricing__price span {
  font-size: var(--text-body-size);
  font-weight: 400;
  color: var(--color-text-secondary);
}

.pricing__trial {
  font-size: var(--text-small-size);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.pricing__features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--spacing-xl);
}

.pricing__features li {
  padding: var(--spacing-xs) 0;
  font-size: var(--text-small-size);
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.pricing__features li::before {
  content: '';
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%2310B981' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") no-repeat center;
}

/* ── Final CTA ── */
.final-cta {
  background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-cta) 100%);
  padding: var(--spacing-xxxl) 0;
  text-align: center;
}

.final-cta__title {
  font-size: var(--text-h2-size);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--spacing-sm);
}

.final-cta__subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-body-size);
  max-width: 560px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.7;
}

.final-cta .btn--primary {
  background: #fff;
  color: var(--color-brand);
}

.final-cta .btn--primary:hover {
  background: var(--color-bg-alt);
}

/* ── Footer ── */
.footer {
  background: var(--color-bg-alt);
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer__logo {
  font-size: var(--text-h3-size);
  font-weight: 700;
  color: var(--color-brand);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer__links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.footer__link {
  color: var(--color-text-secondary);
  font-size: var(--text-small-size);
}

.footer__link:hover {
  color: var(--color-brand);
}

.footer__copy {
  font-size: var(--text-small-size);
  color: var(--color-text-muted);
}

/* ── Responsive ── */
@media (max-width: 1023px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .hero__visual {
    max-width: 560px;
    margin: 0 auto;
  }

  .features__grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .timeline__grid {
    grid-template-columns: 1fr;
  }

  .timeline__visual {
    order: -1;
    min-height: 240px;
  }

  .scenarios__grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

  .comparison__grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }

  .graph__grid {
    grid-template-columns: 1fr;
  }

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

  .graph__cta {
    display: flex;
    justify-content: center;
  }
}

@media (max-width: 767px) {
  :root {
    --text-h1-size: var(--text-h1-mobile);
    --text-h2-size: 1.75rem;
  }

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

  .container {
    padding: 0 var(--spacing-md);
  }

  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: block;
  }

  .nav__mobile-menu {
    display: none;
    flex-direction: column;
    padding: var(--spacing-md) var(--spacing-lg);
    gap: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
  }

  .nav__mobile-menu--open {
    display: flex;
  }

  .nav__mobile-menu .nav__link {
    padding: var(--spacing-sm) 0;
    font-size: var(--text-body-size);
  }

  .nav__mobile-menu .btn {
    width: 100%;
    margin-top: var(--spacing-sm);
  }

  .hero {
    padding: var(--spacing-xxl) 0;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}