/* ========================================
   silico/6 — Style Sheet
   ======================================== */

/* --- Custom Properties --- */
:root {
  --color-primary: #0E0F11;
  --color-secondary: #6B7280;
  --color-accent: #D6A84F;
  --color-bg: #15171A;
  --color-bg-light: #1A1D21;
  --color-border: #2A2D32;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1120px;
  --nav-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-mono);
  background-color: var(--color-bg);
  color: var(--color-secondary);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #fff;
}

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

ul {
  list-style: none;
}

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

.section {
  padding: 100px 0;
}

.section-label {
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(24px, 4vw, 36px);
  color: #fff;
  font-weight: 600;
  margin-bottom: 24px;
  line-height: 1.3;
}

.section-desc {
  max-width: 640px;
  margin-bottom: 48px;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(21, 23, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}

.nav-logo span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 13px;
  letter-spacing: 0.5px;
}

.nav-links a.active {
  color: #fff;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 1px;
  transition: all 0.3s;
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Mobile Nav --- */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    gap: 40px;
    font-size: 18px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links a {
    font-size: 18px;
  }
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
}

.hero-content {
  max-width: 720px;
}

.hero-title {
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-tagline {
  font-size: clamp(16px, 2.5vw, 20px);
  line-height: 1.6;
  margin-bottom: 40px;
}

.accent {
  color: var(--color-accent);
}

.hero-cursor {
  display: inline-block;
  width: 0.6em;
  height: 2px;
  background: var(--color-accent);
  margin-left: 6px;
  vertical-align: baseline;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-line {
  width: 48px;
  height: 2px;
  background: var(--color-accent);
  margin-bottom: 24px;
  animation: expandLine 1.5s ease forwards;
}

@keyframes expandLine {
  from { width: 0; }
  to { width: 48px; }
}

/* --- About Section --- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.about-card {
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg-light);
  transition: border-color 0.3s;
}

.about-card:hover {
  border-color: var(--color-accent);
}

.about-card h3 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 12px;
  font-weight: 600;
}

.about-card p {
  font-size: 14px;
  line-height: 1.7;
}

/* --- How We Work Section --- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg-light);
  counter-increment: step;
}

.step::before {
  content: "0" counter(step);
  display: block;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 16px;
  line-height: 1;
}

.step h3 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 12px;
  font-weight: 600;
}

.step p {
  font-size: 13px;
  line-height: 1.7;
}

/* connector line between steps on desktop */
@media (min-width: 1024px) {
  .step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 44px;
    right: -17px;
    width: 32px;
    height: 2px;
    background: var(--color-border);
  }
}

/* --- Contact Section --- */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

@media (max-width: 768px) {
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-secondary);
}

.form-group input,
.form-group textarea {
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 12px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  color: #fff;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group .error-msg {
  font-size: 12px;
  color: #e05252;
  display: none;
}

.form-group.has-error .error-msg {
  display: block;
}

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: #e05252;
}

.form-error {
  font-size: 13px;
  color: #e05252;
  padding: 12px 16px;
  background: rgba(224, 82, 82, 0.1);
  border: 1px solid rgba(224, 82, 82, 0.3);
  border-radius: 6px;
  display: none;
}

.form-error:not(:empty) {
  display: block;
}

/* Honeypot — hidden from users */
.form-hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
  pointer-events: none;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.radio-label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--color-secondary);
  cursor: pointer;
  padding: 10px 16px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  transition: all 0.2s;
}

.radio-label span {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.radio-label strong {
  display: block;
  font-size: 14px;
}

.radio-label small {
  display: block;
  font-size: 11px;
  opacity: 0.7;
  font-weight: normal;
}

.radio-label:hover {
  border-color: var(--color-secondary);
}

.radio-label input[type="radio"] {
  accent-color: var(--color-accent);
  cursor: pointer;
}

.radio-label:has(input:checked) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.form-challenge {
  font-size: 13px;
  color: var(--color-secondary);
}

.form-challenge span {
  color: var(--color-accent);
  font-weight: 600;
}

.btn {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  padding: 14px 32px;
  border: 1px solid var(--color-accent);
  border-radius: 6px;
  background: transparent;
  color: var(--color-accent);
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
  align-self: flex-start;
}

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

.form-success {
  display: none;
  padding: 16px;
  border: 1px solid var(--color-accent);
  border-radius: 6px;
  color: var(--color-accent);
  font-size: 14px;
}

.contact-info h3 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 16px;
}

.contact-info p {
  font-size: 14px;
  margin-bottom: 32px;
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 18px;
  transition: all 0.2s;
}

.social-links a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 12px;
  color: var(--color-secondary);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 12px;
}

/* --- Demos Page --- */
.page-header {
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 40px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg-light);
  transition: border-color 0.3s;
}

.card:hover {
  border-color: var(--color-accent);
}

.card-badge {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 4px;
  background: rgba(214, 168, 79, 0.12);
  color: var(--color-accent);
  margin-bottom: 16px;
  font-weight: 600;
}

.card h3 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 12px;
  font-weight: 600;
}

.card p {
  font-size: 13px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.card-link {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}

.card-link:hover {
  color: var(--color-accent);
  gap: 10px;
}

.card-link::after {
  content: "→";
}

.card-link {
  display: flex;
}

.card-link + .card-link {
  margin-top: 8px;
}

.card-link--disabled {
  opacity: 0.45;
  cursor: default;
}

.card-link--disabled:hover {
  gap: 6px;
}

/* --- Demos two-column layout --- */
.demos-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.demos-columns .section-desc {
  margin-bottom: 24px;
}

.card-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

@media (max-width: 768px) {
  .demos-columns {
    grid-template-columns: 1fr;
    gap: 64px;
  }
}

/* --- Blog cards --- */
.blog-card-platform {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-secondary);
  margin-bottom: 12px;
}

/* --- Responsive tweaks --- */
@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .hero {
    min-height: calc(100vh - 40px);
  }
}