/* ===================================================================
   SyncMyMind — style.css
   Component styles for editorial magazine landing page.
   =================================================================== */

/* ===================================================================
   HEADER
   =================================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(235, 235, 235, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s var(--ease-out);
}

[data-theme="dark"] .header {
  background: rgba(26, 26, 26, 0.85);
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.header__logo-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.header__logo-text {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.header__right {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__nav a {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}

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

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

/* Mobile nav */
@media (max-width: 768px) {
  .header__nav { display: none; }
}

/* ===================================================================
   HERO
   =================================================================== */

.hero {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero__content {
  max-width: 560px;
}

.hero__label {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 48ch;
}

.hero__viz {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero__viz svg {
  width: 100%;
  max-width: 500px;
  height: auto;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .hero__viz {
    order: -1;
    max-width: 400px;
    margin: 0 auto;
  }
}

/* ===================================================================
   CTA BUTTON
   =================================================================== */

.btn {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* ===================================================================
   EDITORIAL DIVIDER
   =================================================================== */

.divider {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.divider__line {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.divider__line::before,
.divider__line::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.divider__text {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-faint);
  white-space: nowrap;
}

/* ===================================================================
   FEATURES — Magazine Layout
   =================================================================== */

.features {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-10), 6vw, var(--space-20)) var(--space-6);
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-6);
}

.features__main {
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  border: 1px solid var(--color-border);
}

.features__main-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.features__main-subtitle {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
}

.features__viz-container {
  width: 100%;
  aspect-ratio: 4/3;
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.features__viz-container svg,
.features__viz-container canvas {
  width: 100%;
  height: 100%;
}

.features__main-desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 55ch;
}

.features__side {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.features__card {
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.features__card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.features__card-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

@media (max-width: 768px) {
  .features {
    grid-template-columns: 1fr;
  }
}

/* ===================================================================
   HOW IT WORKS — Horizontal Timeline
   =================================================================== */

.how-it-works {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-10), 6vw, var(--space-20)) var(--space-6);
}

.how-it-works__card {
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  border: 1px solid var(--color-border);
}

.how-it-works__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.how-it-works__step {}

.how-it-works__number {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-2xl);
  color: var(--color-text-faint);
  line-height: 1;
  margin-bottom: var(--space-3);
  opacity: 0.35;
}

.how-it-works__title {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}

.how-it-works__desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.how-it-works__note {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.how-it-works__note svg {
  display: inline-block;
  vertical-align: middle;
  margin-right: var(--space-1);
}

@media (max-width: 768px) {
  .how-it-works__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* ===================================================================
   STATEMENT SECTION
   =================================================================== */

.statement {
  padding: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-6);
  text-align: center;
}

.statement__number {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-3xl);
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.statement__question {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-faint);
}

/* ===================================================================
   WAITLIST / EARLY ACCESS
   =================================================================== */

.waitlist {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: clamp(var(--space-10), 6vw, var(--space-20)) var(--space-6);
  text-align: center;
}

.waitlist__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.waitlist__form {
  display: flex;
  gap: var(--space-3);
  max-width: 440px;
  margin: 0 auto var(--space-4);
}

.waitlist__input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-interactive);
}

.waitlist__input::placeholder {
  color: var(--color-text-faint);
}

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

.waitlist__note {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 480px) {
  .waitlist__form {
    flex-direction: column;
  }
}

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

.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-6);
}

.footer__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__left {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__logo-mark {
  width: 20px;
  height: 20px;
}

.footer__logo-text {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.footer__tagline {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__links {
  display: flex;
  gap: var(--space-6);
}

.footer__links a {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  transition: color var(--transition-interactive);
}

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

.footer__copy {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 600px) {
  .footer__inner {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }
  .footer__left {
    flex-direction: column;
    gap: var(--space-2);
  }
}

/* ===================================================================
   SCROLL ANIMATIONS
   =================================================================== */

.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* Fallback for browsers without scroll-driven animations */
.fade-in--visible {
  opacity: 1;
}

/* JS-driven fallback animation */
.fade-in-js {
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
}

.fade-in-js.is-visible {
  opacity: 1;
}

/* ===================================================================
   CONSTELLATION GRAPH (Feature SVG)
   =================================================================== */

.constellation-node {
  cursor: default;
  transition: opacity 0.3s var(--ease-out);
}

.constellation-node:hover .constellation-node__circle {
  filter: brightness(1.15);
}

.constellation-node__label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 500;
  fill: var(--color-text-muted);
  pointer-events: none;
}

.constellation-line {
  stroke: var(--color-border);
  stroke-width: 1;
  opacity: 0.5;
}

/* Gentle floating animation for constellation nodes */
@keyframes float-gentle {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(var(--float-x, 3px), var(--float-y, -4px)); }
}

.constellation-node--animated {
  animation: float-gentle var(--float-duration, 6s) var(--ease-in-out) infinite;
}

/* ===================================================================
   BUBBLE CHART (Hero SVG)
   =================================================================== */

@keyframes bubble-breathe {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(var(--bx, 2px), var(--by, -3px)) scale(var(--bs, 1.03)); }
}

.bubble--animated {
  animation: bubble-breathe var(--bubble-dur, 5s) var(--ease-in-out) infinite;
  transform-origin: center;
  transform-box: fill-box;
}

.bubble-label {
  font-family: var(--font-ui);
  font-weight: 500;
  fill: white;
  pointer-events: none;
  text-anchor: middle;
  dominant-baseline: central;
}

/* ===================================================================
   MISC UTILITIES
   =================================================================== */

.section-spacing {
  padding-block: clamp(var(--space-8), 6vw, var(--space-24));
}