/* Squawkbox - Marketing Site
   Theme matches Squawkbox application (Linear/SST inspired) */

/* ===== CSS Variables ===== */
:root {
  /* Colors - Light mode */
  --color-bg: #fafafa;
  --color-bg-elevated: #ffffff;
  --color-bg-subtle: #f4f4f5;
  --color-bg-muted: #e4e4e7;
  --color-border: #e4e4e7;

  --color-text: #18181b;
  --color-text-secondary: #52525b;
  --color-text-tertiary: #a1a1aa;

  --color-accent: #7c3aed;
  --color-accent-hover: #6d28d9;
  --color-accent-subtle: #ede9fe;
  --color-accent-dark: #5b21b6;

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.75rem;
  --text-5xl: 3.5rem;

  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #09090b;
    --color-bg-elevated: #18181b;
    --color-bg-subtle: #27272a;
    --color-bg-muted: #3f3f46;
    --color-border: #3f3f46;

    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-tertiary: #71717a;

    --color-accent: #a78bfa;
    --color-accent-hover: #8b5cf6;
    --color-accent-subtle: rgba(139, 92, 246, 0.15);
    --color-accent-dark: #7c3aed;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.4);
  }
}

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

* {
  margin: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4 {
  line-height: var(--leading-tight);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--text-4xl);
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-xl);
  font-weight: 600;
}

h4 {
  font-size: var(--text-lg);
  font-weight: 600;
}

p {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul {
  padding-left: var(--space-6);
}

li {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

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

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ===== Header ===== */
.site-header {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background-color: rgba(9, 9, 11, 0.8);
  }
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-text);
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.site-nav a {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.nav-cta {
  background-color: var(--color-accent);
  color: white !important;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
}

.nav-cta:hover {
  background-color: var(--color-accent-hover);
  color: white !important;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

.mobile-menu-btn.open span:nth-child(2) {
  opacity: 0;
}

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

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-4) var(--space-6);
    gap: var(--space-4);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    font-size: var(--text-base);
  }

  .nav-cta {
    text-align: center;
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: var(--leading-normal);
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-primary {
  background-color: var(--color-accent);
  color: white;
  box-shadow: var(--shadow-md), 0 0 0 0 var(--color-accent-subtle);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg), 0 0 0 4px var(--color-accent-subtle);
}

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

.btn-secondary:hover {
  background-color: var(--color-bg-subtle);
  color: var(--color-text);
  border-color: var(--color-text-tertiary);
}

.btn-full {
  width: 100%;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: calc(var(--space-32) + 4rem) 0 var(--space-24);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-accent-subtle) 0%, var(--color-bg) 50%, var(--color-bg-subtle) 100%);
  z-index: -1;
}

@media (prefers-color-scheme: dark) {
  .hero-bg {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.15) 0%, var(--color-bg) 50%, var(--color-bg-subtle) 100%);
  }
}

.hero-content {
  max-width: 48rem;
}

.hero-badge {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-accent-subtle);
  color: var(--color-accent-dark);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

@media (prefers-color-scheme: dark) {
  .hero-badge {
    color: var(--color-accent);
  }
}

.hero h1 {
  font-size: var(--text-5xl);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 40rem;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .hero {
    padding: calc(var(--space-24) + 4rem) 0 var(--space-16);
  }

  .hero h1 {
    font-size: var(--text-3xl);
  }

  .hero-subtitle {
    font-size: var(--text-lg);
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

/* ===== Value Props ===== */
.value-props {
  padding: var(--space-12) 0;
  background-color: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

.value-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.value-icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  border-radius: var(--radius-lg);
}

.value-text {
  display: flex;
  flex-direction: column;
}

.value-text strong {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.value-text span {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

@media (max-width: 1024px) {
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

@media (max-width: 640px) {
  .value-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto var(--space-16);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-lg);
}

/* ===== Features ===== */
.features {
  padding: var(--space-24) 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.feature-card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.feature-icon-lg {
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-6);
}

.feature-card h3 {
  margin-bottom: var(--space-3);
}

.feature-card p {
  margin: 0;
  font-size: var(--text-base);
}

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

@media (max-width: 640px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    padding: var(--space-6);
  }
}

/* ===== How It Works ===== */
.how-it-works {
  padding: var(--space-24) 0;
  background-color: var(--color-bg-subtle);
}

.steps {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  max-width: 56rem;
  margin: 0 auto;
}

.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-number {
  width: 4rem;
  height: 4rem;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-xl);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-lg);
}

.step-content h3 {
  margin-bottom: var(--space-3);
}

.step-content p {
  margin: 0;
}

.step-connector {
  flex: 0 0 4rem;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-dark));
  margin-top: 2rem;
  border-radius: 1px;
}

@media (max-width: 768px) {
  .steps {
    flex-direction: column;
    gap: var(--space-8);
  }

  .step-connector {
    display: none;
  }

  .step {
    flex-direction: row;
    text-align: left;
    gap: var(--space-6);
  }

  .step-number {
    flex-shrink: 0;
    margin-bottom: 0;
  }
}

/* ===== About ===== */
.about {
  padding: var(--space-24) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-content h2 {
  margin-bottom: var(--space-6);
}

.about-content p {
  margin-bottom: var(--space-4);
}

.about-content p:last-child {
  margin-bottom: 0;
}

.about-company {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-sm);
}

.about-visual {
  display: flex;
  justify-content: center;
}

.about-card {
  background: linear-gradient(135deg, var(--color-accent-subtle), var(--color-bg-elevated));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  text-align: center;
  max-width: 16rem;
}

.about-card-icon {
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.about-card h4 {
  margin-bottom: var(--space-2);
}

.about-card p {
  font-size: var(--text-sm);
  margin: 0;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .about-visual {
    order: -1;
  }
}

/* ===== Contact ===== */
.contact {
  padding: var(--space-24) 0;
  background-color: var(--color-bg-subtle);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info h2 {
  margin-bottom: var(--space-4);
}

.contact-info > p {
  margin-bottom: var(--space-8);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-secondary);
}

.contact-item svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

.contact-item a {
  color: var(--color-text);
  font-weight: 500;
}

.contact-item a:hover {
  color: var(--color-accent);
}

.contact-form-wrapper {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-group textarea {
  resize: vertical;
  min-height: 6rem;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0;
}

.footer-content {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-logo {
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
}

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

.footer-brand p {
  font-size: var(--text-sm);
  margin: 0;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

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

@media (max-width: 640px) {
  .footer-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-nav {
    justify-content: center;
  }
}

/* ===== Legal Content (Privacy Policy) ===== */
.legal-content {
  padding: calc(var(--space-16) + 4rem) 0 var(--space-16);
}

.legal-content h1 {
  margin-bottom: var(--space-2);
}

.legal-content .last-updated {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  margin-bottom: var(--space-12);
}

.legal-content section {
  margin-bottom: var(--space-10);
}

.legal-content section:last-child {
  margin-bottom: 0;
}

.legal-content h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

.legal-content h3 {
  font-size: var(--text-lg);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.legal-content p {
  margin-bottom: var(--space-4);
}

.legal-content ul {
  margin-bottom: var(--space-4);
}