/* ==========================================================================
   SITLESS - Brutalist Landing Page Styles
   Font: Space Grotesk
   Colors: Black (#000), White (#FFF), Neon Green (#00FF66), Red (#FF3333)
   ========================================================================== */

/* Import Space Grotesk */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

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

:root {
  --color-bg: #000000;
  --color-surface: #0A0A0A;
  --color-card: #111111;
  --color-border: #222222;
  --color-text: #FFFFFF;
  --color-text-secondary: rgba(255, 255, 255, 0.6);
  --color-text-tertiary: rgba(255, 255, 255, 0.38);
  --color-accent: #00FF66;
  --color-error: #FF3333;
  --color-warning: #FFAA00;
  --font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  opacity: 0.8;
}

img {
  max-width: 100%;
  height: auto;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(3rem, 8vw, 6rem);
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 600px;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0;
}

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

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

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

.nav__logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--color-text);
}

.nav__links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav__link {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: color 0.2s;
}

.nav__link:hover {
  color: var(--color-text);
  opacity: 1;
}

.nav__cta {
  padding: 10px 20px;
  background: var(--color-text);
  color: var(--color-bg);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
  color: var(--color-bg);
  opacity: 1;
}

/* Mobile Nav */
@media (max-width: 768px) {
  .nav__links {
    display: none;
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 255, 102, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-bottom: 32px;
}

.hero__title {
  margin-bottom: 24px;
}

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

.hero__subtitle {
  margin-bottom: 48px;
}

.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: 48px;
  margin-top: 80px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.hero__stat {
  text-align: left;
}

.hero__stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.hero__stat-label {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  margin-top: 8px;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn--primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
  color: var(--color-bg);
  opacity: 1;
}

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-text);
  opacity: 1;
}

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

.btn--accent:hover {
  box-shadow: 0 8px 30px rgba(0, 255, 102, 0.3);
  color: var(--color-bg);
  opacity: 1;
}

.btn--large {
  padding: 20px 40px;
  font-size: 1.125rem;
}

/* ==========================================================================
   Problem Section
   ========================================================================== */

.problem {
  text-align: center;
}

.problem__header {
  max-width: 800px;
  margin: 0 auto 80px;
}

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

.problem__card {
  padding: 40px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  text-align: left;
  transition: border-color 0.3s;
}

.problem__card:hover {
  border-color: var(--color-error);
}

.problem__card-icon {
  font-size: 2.5rem;
  margin-bottom: 24px;
}

.problem__card-stat {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-error);
  line-height: 1;
  margin-bottom: 8px;
}

.problem__card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.problem__card-text {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.problem__source {
  margin-top: 48px;
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

/* ==========================================================================
   How It Works Section
   ========================================================================== */

.how-it-works__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 80px;
}

.how-it-works__steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 48px;
}

.step {
  position: relative;
  padding: 40px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.step__number {
  position: absolute;
  top: -20px;
  left: 40px;
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-card);
  line-height: 1;
  z-index: 0;
}

.step__content {
  position: relative;
  z-index: 1;
}

.step__icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.step__title {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.step__text {
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Features Section
   ========================================================================== */

.features__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 80px;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
}

.feature {
  display: flex;
  gap: 24px;
  padding: 32px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  transition: border-color 0.3s;
}

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

.feature__icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
  font-size: 1.25rem;
}

.feature__title {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.feature__text {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* ==========================================================================
   Testimonials Section
   ========================================================================== */

.testimonials {
  text-align: center;
}

.testimonials__header {
  max-width: 700px;
  margin: 0 auto 80px;
}

.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
}

.testimonial {
  padding: 40px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  text-align: left;
}

.testimonial__stars {
  color: var(--color-accent);
  font-size: 1.25rem;
  letter-spacing: 4px;
  margin-bottom: 24px;
}

.testimonial__text {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: 32px;
  color: var(--color-text);
}

.testimonial__author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.testimonial__avatar {
  width: 48px;
  height: 48px;
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

.testimonial__name {
  font-weight: 600;
}

.testimonial__role {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

/* ==========================================================================
   Intensity Section
   ========================================================================== */

.intensity__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 80px;
}

.intensity__cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.intensity-card {
  padding: 40px;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  transition: all 0.3s;
}

.intensity-card--gentle {
  --card-color: #4CAF50;
}

.intensity-card--medium {
  --card-color: #FFAA00;
}

.intensity-card--hardcore {
  --card-color: #FF3333;
}

.intensity-card:hover {
  border-color: var(--card-color);
  transform: translateY(-4px);
}

.intensity-card__badge {
  display: inline-block;
  padding: 6px 12px;
  background: var(--card-color);
  color: var(--color-bg);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

.intensity-card__title {
  font-size: 1.75rem;
  margin-bottom: 16px;
  color: var(--card-color);
}

.intensity-card__list {
  list-style: none;
  margin-bottom: 24px;
}

.intensity-card__list li {
  padding: 8px 0;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
}

.intensity-card__list li:last-child {
  border-bottom: none;
}

.intensity-card__list span {
  color: var(--color-text);
  font-weight: 600;
}

.intensity-card__desc {
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
  font-style: italic;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta {
  text-align: center;
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}

.cta__content {
  max-width: 700px;
  margin: 0 auto;
}

.cta__title {
  margin-bottom: 24px;
}

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

.cta__subtitle {
  margin: 0 auto 48px;
}

.cta__buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta__note {
  margin-top: 32px;
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

/* App Store Buttons */
.store-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: all 0.2s;
}

.store-btn:hover {
  border-color: var(--color-text);
  opacity: 1;
}

.store-btn__icon {
  font-size: 1.5rem;
}

.store-btn__text {
  text-align: left;
}

.store-btn__label {
  font-size: 0.625rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.05em;
}

.store-btn__store {
  font-size: 1rem;
  font-weight: 600;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  padding: 80px 0 40px;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 48px;
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  margin-bottom: 16px;
}

.footer__tagline {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.footer__links {
  display: flex;
  gap: 64px;
}

.footer__column h4 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 20px;
}

.footer__column ul {
  list-style: none;
}

.footer__column li {
  margin-bottom: 12px;
}

.footer__column a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  transition: color 0.2s;
}

.footer__column a:hover {
  color: var(--color-text);
  opacity: 1;
}

.footer__bottom {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__copyright {
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
}

.footer__legal {
  display: flex;
  gap: 24px;
}

.footer__legal a {
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
}

.footer__legal a:hover {
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Legal Pages (Privacy, Terms)
   ========================================================================== */

.legal {
  padding-top: 120px;
}

.legal__header {
  margin-bottom: 64px;
}

.legal__title {
  margin-bottom: 16px;
}

.legal__updated {
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
}

.legal__content {
  max-width: 800px;
}

.legal__content h2 {
  font-size: 1.5rem;
  margin: 48px 0 24px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.legal__content h2:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.legal__content h3 {
  font-size: 1.125rem;
  margin: 32px 0 16px;
}

.legal__content p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.legal__content ul, .legal__content ol {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  padding-left: 24px;
}

.legal__content li {
  margin-bottom: 8px;
}

.legal__content strong {
  color: var(--color-text);
}

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

.legal__highlight {
  padding: 24px;
  background: var(--color-card);
  border-left: 4px solid var(--color-accent);
  margin: 32px 0;
}

.legal__highlight p {
  color: var(--color-text);
  margin: 0;
}

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

@media (max-width: 768px) {
  .section {
    padding: 80px 0;
  }

  .hero__stats {
    flex-direction: column;
    gap: 24px;
  }

  .footer__inner {
    flex-direction: column;
  }

  .footer__links {
    flex-direction: column;
    gap: 32px;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .features__grid {
    grid-template-columns: 1fr;
  }

  .feature {
    flex-direction: column;
  }
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease-out forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }