/* ============================================
   Copypasto Marketing Site
   ============================================ */

/* --- Reset & Variables --- */

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

:root {
  --color-bg: #fafafa;
  --color-bg-alt: #f2f2f2;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #666666;
  --color-text-tertiary: #999999;
  --color-border: #e5e5e5;
  --color-border-light: #f0f0f0;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-primary-subtle: #dbeafe;
  --color-accent: #0ea5e9;
  --color-success: #22c55e;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, sans-serif;
  --font-mono: "SF Mono", ui-monospace, "Cascadia Code", "Fira Code", monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.05);

  --container: 1080px;
  --container-narrow: 720px;
  --nav-height: 60px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* --- Utilities --- */

.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;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-sm);
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-sm {
  padding: 7px 14px;
  font-size: 13px;
}

.btn-lg {
  padding: 13px 28px;
  font-size: 15px;
  border-radius: var(--radius-md);
}

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

.btn-ghost:hover {
  background: var(--color-bg-alt);
  box-shadow: none;
  border-color: var(--color-text-tertiary);
}

/* --- Navigation --- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-border-light);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.nav-logo-icon {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a:not(.btn) {
  font-size: 13px;
  font-weight: 450;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

.nav-links a:not(.btn):hover {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 18px;
  height: 1.5px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 24px 20px;
  background: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-light);
}

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

.mobile-menu a:not(.btn) {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  font-weight: 450;
  color: var(--color-text-secondary);
}

.mobile-menu .btn {
  margin-top: 8px;
  text-align: center;
}

/* --- Sections --- */

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--color-surface);
}

.section-header {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 56px;
}

.section-header h2 {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Hero --- */

.hero {
  padding-top: calc(var(--nav-height) + 80px);
  padding-bottom: 64px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 550;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-subtle);
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.01em;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin-bottom: 20px;
}

.hero-sub {
  max-width: 520px;
  margin: 0 auto 36px;
  font-size: clamp(16px, 2.5vw, 18px);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 72px;
}

/* Hero visual */

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  max-width: 700px;
  margin: 0 auto;
}

.hero-window {
  flex: 1;
  max-width: 240px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.window-chrome {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-light);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.window-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.window-line {
  height: 8px;
  border-radius: 4px;
  background: var(--color-bg-alt);
}

.window-line.w-80 { width: 80%; }
.window-line.w-70 { width: 70%; }
.window-line.w-60 { width: 60%; }
.window-line.w-50 { width: 50%; }
.window-line.w-40 { width: 40%; }

.window-line.selected {
  background: var(--color-primary-subtle);
  border: 1px solid var(--color-primary);
  position: relative;
}

.window-line.pasted {
  background: #dcfce7;
  border: 1px solid var(--color-success);
  position: relative;
}

.window-line .cursor {
  position: absolute;
  right: -2px;
  top: -2px;
  bottom: -2px;
  width: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  animation: blink 1s step-end infinite;
}

.window-line.pasted .cursor {
  background: var(--color-success);
}

@keyframes blink {
  50% { opacity: 0; }
}

.window-label {
  padding: 8px 14px;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-align: center;
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg-alt);
}

/* Sync animation between windows */

.hero-sync {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 20px;
  position: relative;
}

.sync-line {
  width: 1px;
  height: 40px;
  background: var(--color-border);
  position: relative;
}

.sync-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  position: absolute;
  left: -2.5px;
  animation: sync-move 2s ease-in-out infinite;
}

@keyframes sync-move {
  0%, 100% { top: 0; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.sync-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-subtle);
  border-radius: 50%;
}

.sync-badge {
  font-size: 9px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-primary);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* --- Features --- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

/* --- How It Works --- */

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 540px;
  margin: 0 auto;
  position: relative;
}

.steps::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 48px;
  bottom: 48px;
  width: 1px;
  background: var(--color-border);
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 20px 0;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 650;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-subtle);
  border-radius: 50%;
  position: relative;
  z-index: 1;
}

.step-content h3 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
  margin-top: 2px;
}

.step-content p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

/* --- Security --- */

.security-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.security-card {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease;
}

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

.security-label {
  font-size: 11px;
  font-weight: 550;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
}

.security-value {
  font-size: 17px;
  font-weight: 650;
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
  margin-bottom: 10px;
  color: var(--color-text);
}

.security-card p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Security footer diagram */

.security-footer {
  text-align: center;
}

.security-diagram {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 24px 36px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
}

.diagram-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.diagram-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

.diagram-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--color-text-tertiary);
}

.diagram-label {
  font-size: 10px;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--color-primary);
  letter-spacing: 0.03em;
}

.diagram-caption {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

/* --- FAQ --- */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border-light);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border-light);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  transition: color 0.15s ease;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 300;
  color: var(--color-text-tertiary);
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] summary::after {
  content: "\2212";
}

.faq-item summary:hover {
  color: var(--color-primary);
}

.faq-item p {
  padding-bottom: 18px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Waitlist / CTA --- */

.waitlist {
  padding: 80px 0 96px;
}

.waitlist-card {
  text-align: center;
  padding: 56px 48px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.waitlist-card h2 {
  font-size: clamp(24px, 4vw, 30px);
  font-weight: 650;
  letter-spacing: -0.025em;
  margin-bottom: 10px;
}

.waitlist-card > p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 440px;
  margin: 0 auto 28px;
  line-height: 1.6;
}

.waitlist-form .form-row {
  display: flex;
  gap: 8px;
  max-width: 420px;
  margin: 0 auto;
}

.waitlist-form input[type="email"] {
  flex: 1;
  padding: 13px 16px;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.waitlist-form input[type="email"]:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.waitlist-form input[type="email"]::placeholder {
  color: var(--color-text-tertiary);
}

.form-note {
  margin-top: 12px;
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.waitlist-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--color-success);
}

.waitlist-success p {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

/* --- Footer --- */

.footer {
  padding: 28px 0;
  border-top: 1px solid var(--color-border-light);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.footer-logo-icon {
  color: var(--color-text-tertiary);
}

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

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .section { padding: 64px 0; }

  .hero {
    padding-top: calc(var(--nav-height) + 48px);
    padding-bottom: 40px;
  }

  .hero-cta {
    flex-direction: column;
    margin-bottom: 48px;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 280px;
  }

  .hero-visual {
    flex-direction: column;
    gap: 0;
  }

  .hero-window {
    max-width: 200px;
  }

  .hero-sync {
    padding: 12px 0;
    flex-direction: row;
    gap: 8px;
  }

  .sync-line {
    width: 40px;
    height: 1px;
  }

  .sync-dot {
    animation: sync-move-h 2s ease-in-out infinite;
    top: -2.5px;
    left: 0;
  }

  @keyframes sync-move-h {
    0%, 100% { left: 0; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { left: 100%; opacity: 0; }
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .feature-card { padding: 22px; }

  .security-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .security-diagram {
    flex-direction: column;
    padding: 24px;
    gap: 12px;
  }

  .diagram-arrow {
    transform: rotate(90deg);
  }

  .waitlist-card {
    padding: 40px 24px;
  }

  .waitlist-form .form-row {
    flex-direction: column;
  }

  .waitlist-form .btn {
    width: 100%;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 36px;
  }

  .section-header {
    margin-bottom: 36px;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* --- Focus & Accessibility --- */

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

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

/* --- Selection --- */

::selection {
  background: var(--color-primary-subtle);
  color: var(--color-text);
}