/* Crystal Academy — Dropbox-inspired design tokens */
:root {
  --dbx-blue: #0061FE;
  --dbx-blue-hover: #004DC7;
  --dbx-blue-light: #B4D1FF;
  --dbx-blue-wash: #F2F7FF;
  --dbx-canvas: #F7F5F2;
  --dbx-canvas-white: #FFFFFF;
  --dbx-ink: #1E1919;
  --dbx-ink-soft: #44403D;
  --dbx-muted: #736C64;
  --dbx-muted-strong: #5B5650;
  --dbx-surface: #FFFFFF;
  --dbx-surface-soft: #EBE9E6;
  --dbx-border: #D3CEC9;
  --dbx-dark: #1E1919;
  --dbx-dark-elevated: #2D2B29;
  --dbx-yellow: #FAD24B;
  --dbx-lime: #B4DC19;
  --dbx-orange: #FA551E;
  --dbx-pink: #C0154C;
  --dbx-purple: #C8AFF0;
  --dbx-success: #0F503C;
  --font-display: "DM Sans", "Sharp Grotesk", SharpGrotesk, "Atlas Grotesk", system-ui, sans-serif;
  --font-body: "Inter", "Atlas Grotesk Web", "Atlas Grotesk", AtlasGrotesk, system-ui, sans-serif;
  --r-xs: 4px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-pill: 9999px;
  --space-section: 96px;
  --space-hero: 128px;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--dbx-ink);
  background: var(--dbx-canvas);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--dbx-blue);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--dbx-blue);
  color: var(--dbx-canvas);
  border-radius: var(--r-md);
  font-weight: 500;
}

.skip-link:focus {
  top: 16px;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
.display-xl {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0;
}

.headline {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.625rem;
  font-weight: 500;
  line-height: 1.3;
  margin: 0;
}

.body-lg {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--dbx-muted);
  margin: 0;
}

.body-md {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--dbx-muted);
  margin: 0;
}

.label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--dbx-blue);
  margin: 0 0 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--r-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
  text-align: center;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  padding: 16px 24px;
  background: var(--dbx-blue);
  color: var(--dbx-canvas);
  border-color: var(--dbx-blue);
}

.btn-primary:hover {
  background: var(--dbx-blue-hover);
  border-color: var(--dbx-blue-hover);
}

.btn-secondary {
  padding: 14px 22px;
  background: transparent;
  color: var(--dbx-ink);
  border-color: var(--dbx-border);
}

.btn-secondary:hover {
  background: var(--dbx-surface-soft);
}

.btn-on-dark {
  padding: 14px 22px;
  background: transparent;
  color: var(--dbx-canvas);
  border-color: rgba(247, 245, 242, 0.35);
}

.btn-on-dark:hover {
  background: rgba(247, 245, 242, 0.08);
}

.btn-arrow::after {
  content: "→";
  transition: transform 0.2s ease;
}

.btn-arrow:hover::after {
  transform: translateX(3px);
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  background: var(--dbx-canvas-white);
  border-bottom: 1px solid var(--dbx-border-soft, var(--dbx-surface-soft));
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.125rem;
  color: var(--dbx-ink);
}

.nav__logo {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: var(--dbx-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav__logo svg {
  width: 18px;
  height: 18px;
}

.nav__links {
  display: none;
  align-items: center;
  gap: 28px;
}

.nav__links a {
  font-size: 1rem;
  color: var(--dbx-ink-soft);
  transition: color 0.2s ease;
}

.nav__links a:hover {
  color: var(--dbx-blue);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--dbx-border);
  border-radius: var(--r-md);
  cursor: pointer;
  color: var(--dbx-ink);
}

.nav__toggle svg {
  width: 20px;
  height: 20px;
}

.nav__mobile-menu {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--dbx-canvas-white);
  border-bottom: 1px solid var(--dbx-border);
  padding: 16px 24px 24px;
  flex-direction: column;
  gap: 4px;
}

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

.nav__mobile-menu a {
  padding: 12px 0;
  font-size: 1rem;
  color: var(--dbx-ink-soft);
  border-bottom: 1px solid var(--dbx-surface-soft);
}

.nav__mobile-menu .btn {
  margin-top: 12px;
  width: 100%;
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }

  .nav__toggle {
    display: none;
  }
}

/* Hero */
.hero {
  padding: 64px 0 var(--space-hero);
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.hero__content {
  max-width: 560px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 20px;
  background: var(--dbx-blue-wash);
  border-radius: var(--r-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--dbx-blue);
}

.hero__eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dbx-lime);
}

.hero__title {
  margin-bottom: 20px;
}

.hero__title-accent {
  color: var(--dbx-blue);
}

.hero__subtitle {
  margin-bottom: 32px;
  max-width: 520px;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero__trust-line {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--dbx-muted-strong);
}

.hero__trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero__trust-item svg {
  flex-shrink: 0;
  color: var(--dbx-success);
}

/* Product mockup */
.hero__mockup {
  position: relative;
  min-height: 380px;
}

.mockup-desktop {
  background: var(--dbx-surface);
  border: 1px solid var(--dbx-border);
  border-radius: var(--r-xl);
  box-shadow: 0 24px 48px rgba(30, 25, 25, 0.08);
  overflow: hidden;
}

.mockup-desktop__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: var(--dbx-surface-soft);
  border-bottom: 1px solid var(--dbx-border);
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.mockup-dot--red { background: var(--dbx-pink); }
.mockup-dot--yellow { background: var(--dbx-yellow); }
.mockup-dot--green { background: var(--dbx-lime); }

.mockup-desktop__title {
  margin-left: 8px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--dbx-muted);
}

.mockup-desktop__body {
  padding: 20px;
  display: grid;
  gap: 12px;
}

.mockup-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--dbx-canvas);
  border-radius: var(--r-md);
  border: 1px solid var(--dbx-border-soft, var(--dbx-surface-soft));
}

.mockup-row--live {
  background: var(--dbx-blue-wash);
  border-color: var(--dbx-blue-light);
}

.mockup-row__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.mockup-row__icon--blue { background: var(--dbx-blue-light); }
.mockup-row__icon--yellow { background: #FEF3C7; }
.mockup-row__icon--lime { background: #E8F5C8; }
.mockup-row__icon--orange { background: #FFE4D6; }

.mockup-row__text {
  flex: 1;
  min-width: 0;
}

.mockup-row__name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--dbx-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mockup-row__meta {
  font-size: 0.75rem;
  color: var(--dbx-muted);
}

.mockup-row__badge {
  padding: 4px 10px;
  border-radius: var(--r-pill);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}

.mockup-row__badge--live {
  background: var(--dbx-orange);
  color: white;
}

.mockup-row__badge--new {
  background: var(--dbx-blue-light);
  color: var(--dbx-blue);
}

.mockup-mobile {
  position: absolute;
  bottom: -20px;
  right: -8px;
  width: 200px;
  background: var(--dbx-surface);
  border: 1px solid var(--dbx-border);
  border-radius: 20px;
  box-shadow: 0 16px 32px rgba(30, 25, 25, 0.12);
  overflow: hidden;
}

.mockup-mobile__notch {
  height: 24px;
  background: var(--dbx-surface-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mockup-mobile__notch-bar {
  width: 48px;
  height: 4px;
  background: var(--dbx-border);
  border-radius: var(--r-pill);
}

.mockup-mobile__body {
  padding: 16px;
}

.mockup-mobile__stat {
  text-align: center;
  padding: 12px;
  background: var(--dbx-blue-wash);
  border-radius: var(--r-md);
  margin-bottom: 10px;
}

.mockup-mobile__stat-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--dbx-blue);
}

.mockup-mobile__stat-label {
  font-size: 0.6875rem;
  color: var(--dbx-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mockup-mobile__msg {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 8px;
  background: var(--dbx-canvas);
  border-radius: var(--r-sm);
}

.mockup-mobile__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--dbx-purple);
  flex-shrink: 0;
}

.mockup-mobile__msg-text {
  font-size: 0.6875rem;
  color: var(--dbx-ink-soft);
  line-height: 1.4;
}

@media (min-width: 960px) {
  .hero__grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }

  .hero {
    padding-top: var(--space-hero);
  }
}

/* Benefits strip */
.benefits {
  padding: 48px 0;
  background: var(--dbx-canvas-white);
  border-top: 1px solid var(--dbx-border);
  border-bottom: 1px solid var(--dbx-border);
}

.benefits__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.benefit-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.benefit-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  background: var(--dbx-blue-wash);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--dbx-blue);
}

.benefit-card__title {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 500;
  margin: 0 0 4px;
  color: var(--dbx-ink);
}

.benefit-card__text {
  font-size: 0.9375rem;
  color: var(--dbx-muted);
  margin: 0;
}

@media (min-width: 640px) {
  .benefits__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .benefits__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Feature sections */
.feature {
  padding: var(--space-section) 0;
}

.feature--alt {
  background: var(--dbx-canvas-white);
}

.feature__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.feature__grid--reverse .feature__content {
  order: 2;
}

.feature__grid--reverse .feature__media {
  order: 1;
}

.feature__content {
  max-width: 520px;
}

.feature__headline {
  margin: 8px 0 16px;
}

.feature__copy {
  margin-bottom: 24px;
}

.feature__list {
  margin-bottom: 28px;
}

.feature__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.9375rem;
  color: var(--dbx-ink-soft);
}

.feature__list li::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--dbx-blue);
  flex-shrink: 0;
}

.feature-card-stack {
  display: grid;
  gap: 12px;
}

.feature-panel {
  background: var(--dbx-surface);
  border: 1px solid var(--dbx-border);
  border-radius: var(--r-lg);
  padding: 24px;
}

.feature-panel--highlight {
  background: var(--dbx-blue-wash);
  border-color: var(--dbx-blue-light);
}

.feature-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.feature-panel__tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: var(--r-pill);
}

.feature-panel__tag--live {
  background: var(--dbx-orange);
  color: white;
}

.feature-panel__tag--study {
  background: var(--dbx-lime);
  color: var(--dbx-ink);
}

.feature-panel__tag--qa {
  background: var(--dbx-purple);
  color: var(--dbx-ink);
}

.feature-panel__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  margin: 0 0 8px;
}

.feature-panel__desc {
  font-size: 0.875rem;
  color: var(--dbx-muted);
  margin: 0;
}

@media (min-width: 960px) {
  .feature__grid {
    grid-template-columns: 1fr 1fr;
    gap: 80px;
  }

  .feature__grid--reverse .feature__content {
    order: 1;
  }

  .feature__grid--reverse .feature__media {
    order: 2;
  }
}

/* Social proof */
.social-proof {
  padding: var(--space-section) 0;
  background: var(--dbx-surface-soft);
}

.social-proof__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.social-proof__header .body-lg {
  margin-top: 12px;
}

.testimonials {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.testimonial {
  background: var(--dbx-surface);
  border: 1px solid var(--dbx-border);
  border-radius: var(--r-lg);
  padding: 28px;
}

.testimonial__stars {
  display: flex;
  gap: 2px;
  margin-bottom: 16px;
  color: var(--dbx-yellow);
}

.testimonial__quote {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--dbx-ink-soft);
  margin: 0 0 20px;
}

.testimonial__author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--dbx-blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--dbx-blue);
}

.testimonial__name {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--dbx-ink);
  margin: 0;
}

.testimonial__meta {
  font-size: 0.8125rem;
  color: var(--dbx-muted);
  margin: 0;
}

@media (min-width: 768px) {
  .testimonials {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .testimonials {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Dark security / trust panel */
.trust-panel {
  padding: var(--space-section) 0;
}

.trust-panel__card {
  background: var(--dbx-dark);
  color: var(--dbx-canvas);
  border-radius: var(--r-xl);
  padding: 48px 32px;
  display: grid;
  gap: 40px;
  align-items: center;
}

.trust-panel__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--r-lg);
  background: var(--dbx-dark-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--dbx-lime);
}

.trust-panel__headline {
  margin-bottom: 16px;
}

.trust-panel__copy {
  color: rgba(247, 245, 242, 0.75);
  margin-bottom: 28px;
  max-width: 520px;
}

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

.trust-stat {
  background: var(--dbx-dark-elevated);
  border-radius: var(--dbx-lg, var(--r-lg));
  padding: 24px;
  text-align: center;
}

.trust-stat__value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 500;
  color: var(--dbx-canvas);
  margin: 0 0 4px;
}

.trust-stat__label {
  font-size: 0.8125rem;
  color: rgba(247, 245, 242, 0.6);
  margin: 0;
}

.trust-panel__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 768px) {
  .trust-panel__card {
    grid-template-columns: 1.2fr 1fr;
    padding: 64px;
  }

  .trust-panel__stats {
    grid-template-columns: 1fr;
  }
}

/* Final CTA */
.final-cta {
  padding: var(--space-section) 0;
  background: var(--dbx-blue-wash);
}

.final-cta__inner {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.final-cta__inner .headline {
  margin-bottom: 16px;
}

.final-cta__inner .body-lg {
  margin-bottom: 32px;
}

.final-cta__note {
  margin-top: 16px;
  font-size: 0.8125rem;
  color: var(--dbx-muted);
}

/* Footer */
.footer {
  background: var(--dbx-dark);
  color: rgba(247, 245, 242, 0.75);
  padding: 64px 0 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer__brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--dbx-canvas);
  margin: 0 0 12px;
}

.footer__desc {
  font-size: 0.9375rem;
  max-width: 320px;
  margin: 0;
}

.footer__heading {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--dbx-canvas);
  margin: 0 0 16px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  font-size: 0.9375rem;
  transition: color 0.2s ease;
}

.footer__links a:hover {
  color: var(--dbx-canvas);
}

.footer__bottom {
  padding-top: 32px;
  border-top: 1px solid var(--dbx-dark-elevated);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.8125rem;
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}