/* ============================================================
   AI Webhost — Main stylesheet
   Constructivist minimalism, no framework dependencies.
   ============================================================ */

/* CSS Custom Properties */
:root {
  --color-black: #0a0a0b;
  --color-white: #f7f7f5;
  --color-orange: #ff4d00;
  --color-orange-dark: #cc3d00;
  --color-gray-100: #e8e8e6;
  --color-gray-300: #b8b8b6;
  --color-gray-500: #6e6e6e;
  --color-gray-700: #3a3a3c;
  --color-gray-900: #1c1c1e;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'Space Mono', monospace;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;

  --radius: 0;
  --radius-sm: 0.25rem;

  --max-width: 1200px;
  --header-height: 4rem;

  color-scheme: dark;
}

/* Reset & base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-white);
  background-color: var(--color-black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  margin: 0;
  overflow-wrap: break-word;
}

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

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

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

fieldset {
  border: 0;
  padding: 0;
  margin: 0 0 var(--space-xl);
}

legend {
  padding: 0;
  margin-bottom: var(--space-md);
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
}

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

.sr-only,
.skip-link {
  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:focus {
  position: fixed;
  top: var(--space-md);
  left: var(--space-md);
  z-index: 10000;
  width: auto;
  height: auto;
  padding: var(--space-sm) var(--space-md);
  margin: 0;
  clip: auto;
  background: var(--color-orange);
  color: var(--color-white);
  font-weight: 700;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(10, 10, 11, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-gray-900);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-mark {
  color: var(--color-orange);
  font-size: 1.5rem;
  line-height: 1;
}

.main-nav {
  display: none;
  gap: var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--color-orange);
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--color-white);
}

.mobile-menu {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-black);
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.mobile-menu[hidden] {
  display: none;
}

@media (min-width: 768px) {
  .main-nav {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
  .mobile-menu {
    display: none !important;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 2px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover,
.btn:focus {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-orange);
  color: var(--color-white);
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--color-orange-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-gray-700);
}

.btn-secondary:hover,
.btn-secondary:focus {
  border-color: var(--color-orange);
  color: var(--color-orange);
}

.btn-block {
  width: 100%;
}

/* Typography helpers */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-orange);
  margin-bottom: var(--space-sm);
}

.section {
  padding-block: var(--space-3xl);
}

.section-intro {
  max-width: 680px;
  margin-bottom: var(--space-2xl);
}

.section-intro h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.section-intro p {
  color: var(--color-gray-300);
  font-size: 1.125rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100svh - var(--header-height));
  display: flex;
  align-items: center;
  padding-block: var(--space-2xl);
  overflow: hidden;
}

.speed-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.15;
}

.speed-lines span {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--color-orange), transparent);
  animation: speedLine 3s linear infinite;
}

.speed-lines span:nth-child(1) { left: 10%; animation-delay: 0s; }
.speed-lines span:nth-child(2) { left: 25%; animation-delay: 0.6s; }
.speed-lines span:nth-child(3) { left: 50%; animation-delay: 1.2s; }
.speed-lines span:nth-child(4) { left: 75%; animation-delay: 1.8s; }
.speed-lines span:nth-child(5) { left: 90%; animation-delay: 2.4s; }

@keyframes speedLine {
  0% { transform: translateY(-100%); opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { transform: translateY(100%); opacity: 0; }
}

.hero-grid {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 800px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 6rem);
  line-height: 1.0;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.hero h1 .line {
  display: block;
}

.hero h1 .accent {
  color: var(--color-orange);
}

.hero-lead {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--color-gray-300);
  max-width: 560px;
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-gray-900);
}

.stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.125rem;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-orange);
}

.stat-suffix {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-orange);
  margin-right: var(--space-sm);
}

.stat-label {
  width: 100%;
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

/* Problem section */
.problem-grid {
  display: grid;
  gap: var(--space-lg);
}

.problem-card {
  padding: var(--space-xl);
  border: 1px solid var(--color-gray-900);
  background: var(--color-gray-900);
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--color-orange);
}

.problem-card p {
  color: var(--color-gray-300);
}

@media (min-width: 768px) {
  .problem-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Configurator */
.configurator {
  background: var(--color-gray-900);
}

.configurator-layout {
  display: grid;
  gap: var(--space-2xl);
  align-items: start;
}

.config-form fieldset {
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-gray-700);
}

.option-group {
  display: grid;
  gap: var(--space-sm);
}

.option-group.multi {
  grid-template-columns: repeat(2, 1fr);
}

.option-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  border: 1px solid var(--color-gray-700);
  background: var(--color-black);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.option-card:hover,
.option-card:focus-within {
  border-color: var(--color-orange);
}

.option-card input {
  accent-color: var(--color-orange);
  width: 1.1rem;
  height: 1.1rem;
}

.option-card input:checked + span {
  color: var(--color-orange);
}

.option-card:has(input:checked) {
  border-color: var(--color-orange);
  background: rgba(255, 77, 0, 0.08);
}

.config-summary {
  position: sticky;
  top: calc(var(--header-height) + var(--space-lg));
}

.summary-card {
  padding: var(--space-xl);
  border: 1px solid var(--color-gray-700);
  background: var(--color-black);
}

.summary-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--color-gray-500);
  margin-bottom: var(--space-xs);
}

.summary-price {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-orange);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.summary-note {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: var(--space-lg);
}

.summary-meta {
  display: grid;
  gap: var(--space-sm);
  padding-block: var(--space-lg);
  border-top: 1px solid var(--color-gray-900);
  border-bottom: 1px solid var(--color-gray-900);
  margin-bottom: var(--space-lg);
}

.summary-meta span {
  color: var(--color-gray-500);
}

.summary-specs {
  display: grid;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.summary-specs li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--color-gray-300);
}

.summary-specs li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-orange);
  font-weight: 700;
}

@media (min-width: 900px) {
  .configurator-layout {
    grid-template-columns: 1.2fr 0.8fr;
  }
  .option-group:not(.multi) {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tiers */
.tiers-grid {
  display: grid;
  gap: var(--space-lg);
}

.tier-card {
  position: relative;
  padding: var(--space-xl);
  border: 1px solid var(--color-gray-900);
  background: var(--color-gray-900);
  display: flex;
  flex-direction: column;
}

.tier-card.featured {
  border-color: var(--color-orange);
}

.tier-badge {
  position: absolute;
  top: 0;
  right: var(--space-md);
  transform: translateY(-50%);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-orange);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.tier-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.tier-price {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-block: var(--space-xs);
}

.tier-note {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: var(--space-lg);
}

.tier-list {
  display: grid;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  flex: 1;
}

.tier-list li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--color-gray-300);
}

.tier-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-orange);
}

.tier-enterprise .tier-price {
  color: var(--color-orange);
}

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

@media (min-width: 1024px) {
  .tiers-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* Demos */
.demos {
  background: var(--color-gray-900);
}

.demos-grid {
  display: grid;
  gap: var(--space-lg);
}

.demo-card {
  background: var(--color-black);
  border: 1px solid var(--color-gray-900);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.demo-card:hover,
.demo-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--color-gray-700);
}

.demo-preview {
  height: 180px;
  display: grid;
  place-items: center;
  background: var(--demo-bg, var(--color-gray-900));
}

.demo-icon {
  width: 4rem;
  height: 4rem;
  opacity: 0.9;
}

.demo-content {
  padding: var(--space-lg);
}

.demo-price {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-orange);
  margin-bottom: var(--space-xs);
}

.demo-content h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.demo-content p {
  color: var(--color-gray-300);
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.demo-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--color-orange);
  border-bottom: 1px solid var(--color-orange);
  padding-bottom: 2px;
}

.demo-link:hover,
.demo-link:focus {
  color: var(--color-white);
  border-color: var(--color-white);
}

.demo-featured {
  grid-column: 1 / -1;
}

@media (min-width: 768px) {
  .demos-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .demo-featured {
    grid-column: span 2;
  }
}

@media (min-width: 1024px) {
  .demos-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .demo-featured {
    grid-column: span 3;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .demo-featured .demo-preview {
    height: auto;
  }
}

/* Speed */
.speed-grid {
  display: grid;
  gap: var(--space-2xl);
  align-items: center;
}

.speed-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.speed-content p {
  color: var(--color-gray-300);
  margin-bottom: var(--space-lg);
}

.speed-list {
  display: grid;
  gap: var(--space-sm);
}

.speed-list li {
  position: relative;
  padding-left: 1.5rem;
}

.speed-list li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--color-orange);
}

.speed-meter {
  display: grid;
  place-items: center;
}

.meter-ring {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  border: 4px solid var(--color-gray-900);
  display: grid;
  place-items: center;
  text-align: center;
  position: relative;
}

.meter-ring::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 4px solid transparent;
  border-top-color: var(--color-orange);
  border-right-color: var(--color-orange);
  transform: rotate(45deg);
}

.meter-value {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-orange);
  line-height: 1;
}

.meter-value span {
  font-size: 1.5rem;
}

.meter-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--color-gray-500);
  margin-top: var(--space-sm);
}

@media (min-width: 768px) {
  .speed-grid {
    grid-template-columns: 1fr 0.8fr;
  }
}

/* Domain check */
.domain-check {
  background: var(--color-black);
}

.domain-form {
  max-width: 720px;
  margin-inline: auto;
}

.domain-input-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.domain-input-wrap input {
  flex: 1;
  padding: var(--space-md);
  background: var(--color-gray-900);
  border: 1px solid var(--color-gray-700);
  color: var(--color-white);
}

.domain-input-wrap input:focus {
  outline: 2px solid var(--color-orange);
  outline-offset: 2px;
}

.domain-result {
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  border: 1px solid var(--color-gray-900);
  background: var(--color-gray-900);
  min-height: 3.5rem;
  display: flex;
  align-items: center;
}

.domain-result.available {
  border-color: #22c55e;
  color: #86efac;
}

.domain-result.unavailable {
  border-color: #ef4444;
  color: #fca5a5;
}

@media (min-width: 640px) {
  .domain-input-wrap {
    flex-direction: row;
  }
}

/* Process */
.process-grid {
  display: grid;
  gap: var(--space-lg);
  counter-reset: step;
}

.process-step {
  padding: var(--space-xl);
  border: 1px solid var(--color-gray-900);
  background: var(--color-gray-900);
}

.process-number {
  display: block;
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-orange);
  margin-bottom: var(--space-sm);
  opacity: 0.6;
}

.process-step h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.process-step p {
  color: var(--color-gray-300);
}

@media (min-width: 768px) {
  .process-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* FAQ */
.faq-container {
  max-width: 760px;
}

.faq-list {
  display: grid;
  gap: var(--space-md);
}

.faq-item {
  border: 1px solid var(--color-gray-900);
  background: var(--color-gray-900);
}

.faq-item summary {
  padding: var(--space-lg);
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-family: var(--font-mono);
  color: var(--color-orange);
  font-size: 1.5rem;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-gray-300);
}

/* Contact */
.contact {
  background: var(--color-gray-900);
}

.contact-grid {
  display: grid;
  gap: var(--space-2xl);
}

.contact-info h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.contact-info p {
  color: var(--color-gray-300);
  margin-bottom: var(--space-xl);
}

.contact-details {
  display: grid;
  gap: var(--space-md);
}

.contact-details dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--color-gray-500);
}

.contact-details dd {
  margin: 0;
}

.contact-details a:hover,
.contact-details a:focus {
  color: var(--color-orange);
}

.contact-form {
  display: grid;
  gap: var(--space-md);
}

.contact-form label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--color-gray-500);
}

.contact-form input,
.contact-form textarea {
  padding: var(--space-md);
  background: var(--color-black);
  border: 1px solid var(--color-gray-700);
  color: var(--color-white);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--color-orange);
  outline-offset: 2px;
}

.form-status {
  font-size: 0.9375rem;
  min-height: 1.5rem;
}

.form-status.success {
  color: #86efac;
}

.form-status.error {
  color: #fca5a5;
}

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

/* Footer */
.site-footer {
  padding-block: var(--space-2xl);
  border-top: 1px solid var(--color-gray-900);
}

.footer-grid {
  display: grid;
  gap: var(--space-xl);
}

.footer-brand p {
  color: var(--color-gray-500);
  margin-top: var(--space-sm);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
}

.footer-nav a:hover,
.footer-nav a:focus {
  color: var(--color-orange);
}

.footer-legal {
  color: var(--color-gray-500);
  font-size: 0.875rem;
}

.footer-legal a:hover,
.footer-legal a:focus {
  color: var(--color-orange);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr auto auto;
    align-items: start;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: 2px;
}

/* Print */
@media print {
  .site-header,
  .hero-actions,
  .speed-lines,
  .config-summary,
  .domain-form,
  .contact-form,
  .site-footer {
    display: none;
  }
  body {
    color: #000;
    background: #fff;
  }
}