/* Assistora — dark professional marketing site */

:root {
  --bg: #0a0e17;
  --bg-elevated: #111827;
  --bg-card: #151d2e;
  --bg-card-hover: #1a2438;
  --ink: #f1f5f9;
  --ink-muted: #94a3b8;
  --ink-soft: #64748b;
  --border: #1e293b;
  --border-light: #334155;
  --accent: #2dd4bf;
  --accent-dim: #14b8a6;
  --accent-deep: #0d9488;
  --accent-soft: rgba(45, 212, 191, 0.12);
  --accent-glow: rgba(45, 212, 191, 0.18);
  --gradient-brand: linear-gradient(135deg, #2dd4bf 0%, #38bdf8 55%, #818cf8 100%);
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "DM Sans", system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.65);
  --header-h: 76px;
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: #5eead4;
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(10, 14, 23, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.site-header.is-scrolled {
  border-color: var(--border);
  box-shadow: 0 12px 40px -24px rgba(0, 0, 0, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.logo-circle {
  display: block;
  flex-shrink: 0;
  border-radius: 50%;
  overflow: hidden;
  background: #f8fafc;
  border: 1px solid var(--border-light);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.logo-circle img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.logo-circle--header {
  width: 48px;
  height: 48px;
}

.logo-circle--footer {
  width: 40px;
  height: 40px;
}

.logo-circle--contact {
  width: 72px;
  height: 72px;
  margin-bottom: 1.25rem;
}

.logo--footer .logo-text {
  font-size: 1rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav a:not(.btn) {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

.site-nav a:not(.btn):hover {
  color: var(--ink);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  background: var(--bg-elevated);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  margin-inline: auto;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.25rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}

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

.btn-primary {
  background: var(--gradient-brand);
  color: #042f2e;
  box-shadow: 0 8px 28px -8px var(--accent-glow);
}

.btn-primary:hover {
  color: #022c22;
  box-shadow: 0 12px 32px -6px rgba(45, 212, 191, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--border-light);
}

.btn-secondary:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-muted);
}

.btn-ghost:hover {
  color: var(--ink);
  background: var(--accent-soft);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.9rem 1.6rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.text-link {
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
  color: #5eead4;
}

/* Hero */
.hero {
  position: relative;
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(4rem, 10vw, 6rem);
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -30%;
  right: -5%;
  width: min(75vw, 680px);
  aspect-ratio: 1;
  background: radial-gradient(circle, var(--accent-glow), transparent 65%);
  pointer-events: none;
}

.hero-glow::after {
  content: "";
  position: absolute;
  bottom: 20%;
  left: -30%;
  width: 50%;
  height: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.08), transparent 70%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 1.25rem;
  font-family: var(--serif);
  font-size: clamp(2.35rem, 5vw, 3.45rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero h1 em {
  font-style: italic;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  margin: 0 0 1.75rem;
  font-size: 1.125rem;
  color: var(--ink-muted);
  max-width: 38ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-stats li {
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.hero-stats strong {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 0.2rem;
  color: var(--ink);
}

.hero-stats span {
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

/* Capability panel (hero visual) */
.capability-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.capability-panel__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.15rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--border);
  background: rgba(17, 24, 39, 0.6);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.capability-list {
  margin: 0;
  padding: 0.75rem;
  list-style: none;
}

.capability-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.85rem 0.75rem;
  border-radius: 10px;
  transition: background 0.2s;
}

.capability-item.is-active {
  background: var(--accent-soft);
  border: 1px solid rgba(45, 212, 191, 0.2);
}

.capability-icon {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(45, 212, 191, 0.08);
  border-radius: 8px;
}

.capability-item strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}

.capability-item span {
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

.capability-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  padding: 0.75rem 1rem 1rem;
  border-top: 1px solid var(--border);
  background: rgba(10, 14, 23, 0.5);
}

.metric {
  text-align: center;
  padding: 0.65rem 0.25rem;
}

.metric-value {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.15rem;
}

.metric-label {
  font-size: 0.6875rem;
  color: var(--ink-soft);
  line-height: 1.3;
}

/* Logos bar */
.logos-bar {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
}

.logos-bar p {
  margin: 0 0 1rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--ink-soft);
}

.logo-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.logo-row li {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink-muted);
}

/* Sections */
.section {
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
}

.section-head {
  max-width: 540px;
  margin-bottom: 2.5rem;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-head h2 {
  margin: 0 0 0.75rem;
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  font-weight: 400;
  line-height: 1.15;
}

.section-head p:last-child {
  margin: 0;
  color: var(--ink-muted);
}

/* Products */
.products {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

.product-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr;
  gap: 1.25rem;
}

.product-card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s, background 0.2s;
}

.product-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
}

.product-card--featured {
  border-color: rgba(45, 212, 191, 0.25);
  background: linear-gradient(165deg, rgba(45, 212, 191, 0.06) 0%, var(--bg-card) 50%);
}

.product-badge {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.product-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
}

.product-tagline {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-dim);
}

.product-card > p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  color: var(--ink-muted);
}

.feature-list {
  margin: 0 0 1.25rem;
  padding-left: 1.1rem;
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.feature-list li + li {
  margin-top: 0.35rem;
}

/* Platform */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.platform-item {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.platform-icon {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.platform-item h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.platform-item p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-muted);
}

/* Why */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.check-list {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.6rem;
  margin-bottom: 0.65rem;
  color: var(--ink-muted);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 2px;
  background: var(--accent);
  transform: rotate(45deg);
}

.testimonial {
  margin: 0;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.testimonial p {
  margin: 0 0 1.25rem;
  font-family: var(--serif);
  font-size: 1.45rem;
  line-height: 1.35;
  color: var(--ink);
}

.testimonial cite {
  font-style: normal;
  font-size: 0.875rem;
  color: var(--ink-soft);
}

/* CTA band */
.cta-band {
  padding: 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 2.5rem 2.75rem;
  background: linear-gradient(125deg, rgba(45, 212, 191, 0.15) 0%, rgba(56, 189, 248, 0.08) 50%, var(--bg-card) 100%);
  border: 1px solid rgba(45, 212, 191, 0.2);
  border-radius: var(--radius-lg);
}

.cta-inner h2 {
  margin: 0 0 0.5rem;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
}

.cta-inner p {
  margin: 0;
  color: var(--ink-muted);
  max-width: 42ch;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact-form {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.field-row {
  margin-bottom: 1rem;
}

.field-row label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.field-row input,
.field-row textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  font: inherit;
  color: var(--ink);
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: 10px;
}

.field-row input::placeholder,
.field-row textarea::placeholder {
  color: var(--ink-soft);
}

.field-row input:focus,
.field-row textarea:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent-dim);
}

.form-note {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--accent);
}

.form-disclaimer {
  margin: 0.75rem 0 0;
  font-size: 0.75rem;
  color: var(--ink-soft);
}

.contact-aside {
  padding: 1.5rem 0;
}

.contact-aside p {
  margin: 0 0 1.5rem;
  color: var(--ink-muted);
}

.contact-aside dl {
  margin: 0;
}

.contact-aside dt {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 0.2rem;
}

.contact-aside dd {
  margin: 0 0 1rem;
  color: var(--ink-muted);
}

.contact-aside dd a {
  font-weight: 600;
  text-decoration: none;
  color: var(--accent);
}

/* Footer */
.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 2rem;
}

.footer-nav {
  display: flex;
  gap: 1.25rem;
  margin-right: auto;
}

.footer-nav a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}

.footer-nav a:hover {
  color: var(--ink);
}

.footer-copy {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

/* Responsive */
@media (max-width: 960px) {
  .hero-grid,
  .product-grid,
  .why-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .logo-circle--header {
    width: 42px;
    height: 42px;
  }

  .logo-text {
    font-size: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 1rem auto 1rem;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-nav .btn {
    justify-content: center;
  }

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

  .capability-metrics {
    grid-template-columns: 1fr;
  }
}