/* === Sotro Landing Page Styles === */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-background);
  min-height: 100vh;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-xxl);
}

/* === Header === */
.site-header {
  padding: var(--spacing-xxxl) 0 var(--spacing-l) 0;
  text-align: center;
}

.logo {
  height: 180px;
  width: auto;
}

/* === Hero Section === */
.hero {
  text-align: center;
  padding: var(--spacing-xxl) 0 var(--spacing-section) 0;
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xxl);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xxxl);
  line-height: 1.7;
}

.hero-form {
  max-width: 380px;
  margin: 0 auto;
}

/* === Signup Form === */
.signup-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-m);
}

.signup-form input[type="email"] {
  text-align: center;
}

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

.waitlist-message {
  font-size: var(--font-size-m);
  min-height: 20px;
  margin-top: var(--spacing-s);
}

.waitlist-message.success {
  color: var(--color-success);
}

.waitlist-message.error {
  color: var(--color-error);
}

/* === Problem Statement === */
.problem-section {
  text-align: center;
  padding: var(--spacing-section) 0;
  max-width: 640px;
  margin: 0 auto;
}

.problem-text {
  font-size: 1.4rem;
  color: var(--color-primary);
  line-height: 1.7;
  font-weight: 400;
}

/* === Feature Sections === */
.feature-section {
  padding: var(--spacing-xxxl) 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xxxl);
  align-items: center;
}

.feature-content {
  padding: var(--spacing-l) 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.2;
}

.feature-text {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-l);
}

.feature-text:last-child {
  margin-bottom: 0;
}

.feature-highlight {
  background: var(--color-accent-light);
  padding: var(--spacing-l);
  border-radius: var(--radius-l);
  border-left: 3px solid var(--color-accent);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding: var(--spacing-s) 0;
  padding-left: var(--spacing-xxl);
  position: relative;
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* === Device Frame (iPhone-style) === */
.feature-screenshot {
  display: flex;
  justify-content: center;
}

.device-frame {
  width: 280px;
  position: relative;
  background: #1a1a1a;
  border-radius: 44px;
  padding: 12px;
  box-shadow:
    0 0 0 2px #2a2a2a,
    0 20px 48px rgba(47, 62, 47, 0.2),
    0 4px 12px rgba(47, 62, 47, 0.08),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.device-frame::after {
  content: '';
  position: absolute;
  right: -2px;
  top: 130px;
  width: 3px;
  height: 70px;
  background: #2a2a2a;
  border-radius: 0 2px 2px 0;
}

.device-screen {
  width: 100%;
  border-radius: 32px;
  overflow: hidden;
  background: var(--color-background);
  position: relative;
}

.device-frame img,
.device-frame video {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-card) 100%);
  color: var(--color-text-secondary);
  gap: var(--spacing-l);
}

.screenshot-placeholder::after {
  content: attr(data-label);
  font-size: var(--font-size-m);
  font-weight: 500;
  color: var(--color-text-secondary);
  opacity: 0.6;
}

.placeholder-icon {
  width: 48px;
  height: 48px;
  opacity: 0.3;
}

/* === Philosophy Section === */
.philosophy-section {
  text-align: center;
  padding: var(--spacing-section) 0;
  max-width: 640px;
  margin: 0 auto;
}

.philosophy-section .section-title {
  margin-bottom: var(--spacing-xxl);
}

.philosophy-text {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* === CTA Section === */
.cta-section {
  padding: var(--spacing-xxxl) 0;
}

.card {
  background-color: var(--color-card);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xxxl);
}

.cta-card {
  text-align: center;
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.cta-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-s);
}

.cta-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xxl);
}

.cta-card .signup-form {
  max-width: 380px;
  margin: 0 auto;
}

/* === Co-Founder Section === */
.cofounder-section {
  padding: var(--spacing-xxxl) 0;
}

.cofounder-card {
  max-width: var(--container-narrow);
  margin: 0 auto;
  background: linear-gradient(135deg, var(--color-card) 0%, rgba(244, 240, 232, 0.5) 100%);
  border-color: var(--color-accent);
}

.cofounder-text {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-xxl);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-s);
  margin-bottom: var(--spacing-xxl);
}

.tech-tag {
  padding: var(--spacing-s) var(--spacing-l);
  background-color: var(--color-background);
  color: var(--color-text);
  border-radius: var(--radius-round);
  font-size: var(--font-size-m);
  font-weight: 500;
  border: 1px solid var(--color-border);
}

.cofounder-author {
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-xxl);
}

.cofounder-cta {
  display: inline-flex;
}

/* === Contact Section === */
.contact-section {
  text-align: center;
  padding: var(--spacing-xxl) 0 var(--spacing-xxxl);
  font-size: var(--font-size-m);
  color: var(--color-text-secondary);
}

.contact-link {
  color: var(--color-secondary);
  text-decoration: none;
  font-weight: 500;
}

.contact-link:hover {
  text-decoration: underline;
}

/* === Footer === */
.site-footer {
  text-align: center;
  padding: var(--spacing-xxl) var(--spacing-l);
  border-top: 1px solid var(--color-border);
}

.footer-trademark {
  font-size: var(--font-size-s);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-m);
  line-height: 1.6;
}

.footer-copyright {
  font-size: var(--font-size-s);
  color: var(--color-text-secondary);
}

/* === Fade-in Animation === */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* === Responsive === */
@media (min-width: 768px) {
  .hero-title {
    font-size: 3.5rem;
  }

  .hero-subtitle {
    font-size: 1.35rem;
  }

  .problem-text {
    font-size: 1.6rem;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-section);
  }

  .feature-grid.reverse {
    direction: rtl;
  }

  .feature-grid.reverse > * {
    direction: ltr;
  }

  .device-frame {
    width: 300px;
  }

  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-l);
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .problem-text {
    font-size: 1.2rem;
  }

  .device-frame {
    width: 220px;
  }

  .card {
    padding: var(--spacing-xxl);
  }
}