/*
 * Design Brief: Velocore ← inspired by https://creao.ai/
 *
 * Structure: hero-centered → trust-bar → tabbed-platform → integration-strip
 *   → split-schedule-control → memory-learning-panel → metrics-dashboard
 *   → technology-frontier → cta-band → footer-multi-column
 *
 * Hero: centered typography-led, warm white bg, black headline, dual CTAs
 * (solid black primary + outline secondary). Trust logo strip below fold.
 *
 * Tokens derived from creao.ai: high-contrast B/W, emerald live-status accent,
 * generous whitespace, subtle borders, restrained enterprise motion.
 */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Inter:wght@400;500;600&display=swap');

:root {
  --color-bg: #fafafa;
  --color-bg-alt: #f4f4f5;
  --color-bg-dark: #0a0a0a;
  --color-surface: #ffffff;
  --color-text: #0a0a0a;
  --color-text-muted: #71717a;
  --color-text-on-dark: #fafafa;
  --color-text-muted-on-dark: #a1a1aa;
  --color-accent: #10b981;
  --color-accent-hover: #059669;
  --color-accent-soft: rgba(16, 185, 129, 0.12);
  --color-border: #e4e4e7;
  --color-border-strong: #d4d4d8;

  --font-display: 'DM Sans', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --space-section: clamp(4rem, 8vw, 7rem);
  --space-grid: clamp(1.5rem, 3vw, 2.5rem);
  --container-max: 1200px;
  --container-narrow: 900px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.08);

  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-reveal: 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

img, svg {
  display: block;
  max-width: 100%;
}

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

.container {
  width: min(100% - 2rem, var(--container-max));
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - 2rem, var(--container-narrow));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
}

.eyebrow__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 52ch;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: background var(--transition-base), color var(--transition-base),
    border-color var(--transition-base), transform var(--transition-base);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.btn--primary:hover {
  background: #27272a;
  transform: translateY(-1px);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}

.btn--secondary:hover {
  border-color: var(--color-text);
  transform: translateY(-1px);
}

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

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

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn--ghost:hover {
  border-color: var(--color-text);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: 1.5rem;
}

.site-header__logo img {
  height: 28px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.site-nav__links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

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

.site-nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero — centered typography */
.hero--centered {
  padding-block: clamp(3rem, 8vw, 6rem) clamp(2rem, 5vw, 4rem);
  text-align: center;
}

.hero--centered .hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 18ch;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 42ch;
  line-height: 1.55;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* Trust bar */
.trust-bar {
  padding-block: 2.5rem 3rem;
  border-top: 1px solid var(--color-border);
}

.trust-bar__label {
  text-align: center;
  margin-bottom: 1.75rem;
}

.trust-bar__logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 2rem 3rem;
}

.trust-bar__logos span {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  opacity: 0.55;
  letter-spacing: -0.01em;
}

/* Platform — tabbed layout */
.platform-section {
  padding-block: var(--space-section);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.platform-section__header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-grid);
  align-items: start;
  margin-bottom: 3rem;
}

.platform-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.platform-tab {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.25rem;
  text-align: left;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  transition: border-color var(--transition-base), background var(--transition-base),
    box-shadow var(--transition-base);
}

.platform-tab:hover {
  border-color: var(--color-border-strong);
}

.platform-tab.is-active {
  border-color: var(--color-text);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
}

.platform-tab__status {
  flex-shrink: 0;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
}

.platform-tab__status--live {
  background: var(--color-accent-soft);
  color: var(--color-accent-hover);
}

.platform-tab__status--scheduled {
  background: #fef3c7;
  color: #b45309;
}

.platform-tab__status--review {
  background: #dbeafe;
  color: #1d4ed8;
}

.platform-tab__content h3 {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.platform-tab__content p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.platform-panel {
  display: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.platform-panel.is-active {
  display: block;
}

.platform-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 0.8125rem;
}

.platform-panel__live {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-weight: 600;
  color: var(--color-accent-hover);
}

.platform-panel__live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse-live 2s ease-in-out infinite;
}

.platform-panel__body {
  padding: 1.5rem;
}

.platform-panel__mock {
  font-family: ui-monospace, monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.platform-panel__mock strong {
  color: var(--color-text);
  font-weight: 600;
}

.platform-layout {
  display: grid;
  grid-template-columns: minmax(240px, 320px) 1fr;
  gap: 2rem;
  align-items: start;
}

/* Integrations strip */
.integrations-section {
  padding-block: var(--space-section);
}

.integrations-section__header {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: 3rem;
}

.integrations-section__header .section-desc {
  margin-inline: auto;
}

.integrations-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.integration-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.125rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  font-size: 0.875rem;
  font-weight: 500;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.integration-chip:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.integration-chip__icon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  font-weight: 700;
}

.integrations-more {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 2rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  transition: gap var(--transition-base);
}

.integrations-more:hover {
  gap: 0.5rem;
}

/* Capabilities — split schedule control */
.capabilities-section {
  padding-block: var(--space-section);
  background: var(--color-bg-alt);
}

.capabilities-section__intro {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 4rem;
}

.capability-blocks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-grid);
}

.capability-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: box-shadow var(--transition-base);
}

.capability-block:hover {
  box-shadow: var(--shadow-md);
}

.capability-block h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.capability-block > p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.schedule-mock {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: 0.8125rem;
}

.schedule-mock__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.625rem 1rem;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.approval-mock {
  padding: 1rem;
}

.approval-mock__subject {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.approval-mock__preview {
  padding: 0.75rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.approval-mock__actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.approval-mock__actions .btn {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

/* Solutions — staggered use cases */
.solutions-section {
  padding-block: var(--space-section);
}

.solutions-section__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.solutions-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.solution-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: center;
  padding: 1.5rem 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.solution-row:hover {
  border-color: var(--color-border-strong);
  transform: translateX(4px);
}

.solution-row__index {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-muted);
  width: 2rem;
}

.solution-row__content h3 {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.solution-row__content p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.solution-row__tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* Technology — metrics dashboard */
.technology-section {
  padding-block: var(--space-section);
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.technology-section .section-label,
.technology-section .section-desc {
  color: var(--color-text-muted-on-dark);
}

.technology-section .section-title {
  color: var(--color-text-on-dark);
}

.technology-section__header {
  margin-bottom: 3rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.metric-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.metric-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
}

.metric-card__label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted-on-dark);
  margin-bottom: 0.75rem;
}

.metric-card__value {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.metric-card__detail {
  font-size: 0.8125rem;
  color: var(--color-text-muted-on-dark);
  line-height: 1.5;
}

.metric-card__trend {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.8125rem;
  margin-top: 0.75rem;
}

.quality-bar {
  margin-top: 3rem;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  align-items: center;
}

.quality-bar__stat {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
}

.quality-bar__chart {
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.quality-bar__fill {
  height: 100%;
  width: 95%;
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.4), var(--color-accent));
  border-radius: var(--radius-pill);
}

.model-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.5rem;
}

.model-chip {
  padding: 0.5rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted-on-dark);
}

/* CTA band */
.cta-section {
  padding-block: var(--space-section);
  text-align: center;
}

.cta-section__inner {
  max-width: 640px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.cta-section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.cta-section__desc {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

.cta-section__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* Footer */
.site-footer {
  padding-block: 4rem 2rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.site-footer__brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  max-width: 28ch;
}

.site-footer__brand img {
  height: 24px;
}

.site-footer__col h4 {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.site-footer__col ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.site-footer__col a {
  font-size: 0.9375rem;
  color: var(--color-text);
  transition: color var(--transition-base);
}

.site-footer__col a:hover {
  color: var(--color-accent-hover);
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.site-footer__bottom a {
  transition: color var(--transition-base);
}

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

/* Modals */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal__panel {
  position: relative;
  width: min(100%, 520px);
  max-height: 85vh;
  overflow-y: auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: background var(--transition-base), color var(--transition-base);
}

.modal__close:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.modal__panel h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-right: 2rem;
}

.modal__panel p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.modal__panel ul {
  margin-bottom: 1.5rem;
  padding-left: 0;
}

.modal__panel li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.modal__panel li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
}

.modal__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

@keyframes pulse-live {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}