/* ============================================
   ShushFile Landing Page — style.css
   Mobile-first responsive design
   ============================================ */

/* ----- CSS Variables ----- */
:root {
  --color-primary: #6C5CE7;
  --color-primary-dark: #5A4BD1;
  --color-primary-light: #A29BFE;
  --color-secondary: #00CEC9;
  --color-secondary-dark: #00B5B0;
  --color-bg: #F8F9FA;
  --color-bg-white: #FFFFFF;
  --color-text: #2D3436;
  --color-text-light: #636E72;
  --color-text-muted: #B2BEC3;
  --color-border: #DFE6E9;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --container-max: 1140px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --transition: 0.3s ease;
}

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

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

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 700;
}

/* ----- Container ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  border-radius: 50px;
  padding: 10px 24px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(108, 92, 231, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--white {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}
.btn--white:hover {
  background: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255,255,255,0.3);
}

.btn--small {
  padding: 6px 18px;
  font-size: 0.85rem;
}

.btn--large {
  padding: 14px 32px;
  font-size: 1.05rem;
}

/* ----- Section Shared ----- */
.section__title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 12px;
  color: var(--color-text);
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 48px;
}

/* ----- Reveal Animation ----- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== NAVBAR ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--color-primary);
}

.logo__icon {
  font-size: 1.5rem;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Language toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 32px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-light);
  transition: all var(--transition);
}
.lang-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Hamburger */
.navbar__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}
.navbar__hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.navbar__hamburger.active span:nth-child(2) {
  opacity: 0;
}
.navbar__hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.navbar__mobile-menu {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 20px;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-md);
}
.navbar__mobile-menu.open {
  display: flex;
}
.navbar__mobile-menu a {
  font-weight: 500;
  font-size: 1rem;
  padding: 8px 0;
  color: var(--color-text);
}
.navbar__mobile-menu a:hover {
  color: var(--color-primary);
}

/* Desktop: hide hamburger, show inline links */
@media (min-width: 768px) {
  .navbar__hamburger {
    display: none;
  }
  .navbar__mobile-menu {
    display: none !important; /* hide mobile dropdown on desktop */
  }
}

/* ========== HERO ========== */
.hero {
  padding: 100px 0 60px;
  background: linear-gradient(135deg, #F8F9FA 0%, #EDE7F6 50%, #E8F5E9 100%);
  overflow: hidden;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 48px;
}

.hero__content {
  text-align: center;
  max-width: 600px;
}

.hero__title {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--color-text);
}
.hero__title br {
  display: block;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* P2P Diagram */
.hero__visual {
  width: 100%;
  max-width: 500px;
}

.p2p-diagram {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 24px 0 48px;
}

.p2p-device {
  position: relative;
  z-index: 2;
}

.p2p-device__screen {
  width: 90px;
  height: 110px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 2px solid var(--color-border);
  transition: all var(--transition);
}
.p2p-device:hover .p2p-device__screen {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.p2p-device__icon {
  font-size: 2rem;
}

.p2p-device__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-light);
}

/* Connection line */
.p2p-connection {
  position: relative;
  width: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.p2p-connection__line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
  transform: translateY(-50%);
}

.p2p-connection__lock {
  position: relative;
  z-index: 2;
  font-size: 1.4rem;
  background: #fff;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

/* Animated particles */
.p2p-connection__particles {
  position: absolute;
  top: 50%;
  left: 10px;
  right: 10px;
  height: 3px;
  transform: translateY(-50%);
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 8px;
  height: 3px;
  background: var(--color-secondary);
  border-radius: 2px;
  animation: particleMove 2s linear infinite;
  opacity: 0;
}
.particle:nth-child(1) { animation-delay: 0s; }
.particle:nth-child(2) { animation-delay: 0.4s; }
.particle:nth-child(3) { animation-delay: 0.8s; }
.particle:nth-child(4) { animation-delay: 1.2s; }
.particle:nth-child(5) { animation-delay: 1.6s; }

@keyframes particleMove {
  0% { left: 0; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { left: calc(100% - 8px); opacity: 0; }
}

/* No server badge */
.p2p-noserver {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  padding: 6px 14px;
  border-radius: 50px;
  box-shadow: var(--shadow-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-light);
  white-space: nowrap;
}

.p2p-noserver__icon {
  font-size: 0.9rem;
}

/* ========== HOW IT WORKS ========== */
.how-it-works {
  padding: 80px 0;
  background: var(--color-bg-white);
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.step {
  flex: 0 1 240px;
  text-align: center;
  padding: 24px 16px;
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  border-radius: 50%;
  margin-bottom: 16px;
}

.step__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  color: var(--color-primary);
}
.step__icon svg {
  width: 100%;
  height: 100%;
}

.step__title {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.step__desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.step__arrow {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  padding-top: 80px;
  color: var(--color-text-muted);
}
.step__arrow svg {
  width: 40px;
  height: 24px;
}

@media (min-width: 768px) {
  .step__arrow {
    display: flex;
  }
  .steps {
    flex-wrap: nowrap;
  }
}

/* ========== FEATURES ========== */
.features {
  padding: 80px 0;
  background: var(--color-bg);
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 600px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 900px) {
  .features__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: var(--color-primary);
}
.feature-card__icon svg {
  width: 100%;
  height: 100%;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* ========== COMPARISON ========== */
.comparison {
  padding: 80px 0;
  background: var(--color-bg-white);
}

.comparison__table {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.comparison__header,
.comparison__row {
  display: grid;
  grid-template-columns: 1.8fr repeat(4, 1fr);
}

.comparison__header {
  background: var(--color-text);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
}

.comparison__row {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}
.comparison__row:last-child {
  border-bottom: none;
}
.comparison__row:nth-child(even) {
  background: var(--color-bg);
}

.comparison__cell {
  padding: 14px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  text-align: center;
}

.comparison__cell--label {
  justify-content: flex-start;
  font-weight: 500;
  color: var(--color-text);
}

.comparison__cell--highlight {
  background: rgba(108, 92, 231, 0.08);
  font-weight: 600;
  color: var(--color-primary);
}

.comparison__header .comparison__cell--highlight {
  background: var(--color-primary);
  color: #fff;
}

/* Mobile: smaller font */
@media (max-width: 600px) {
  .comparison__header,
  .comparison__row {
    grid-template-columns: 1.5fr repeat(4, 1fr);
  }
  .comparison__cell {
    padding: 10px 6px;
    font-size: 0.75rem;
  }
}

/* Comparison: small text cells */
.comparison__cell--small-text {
  font-size: 0.7rem;
  line-height: 1.3;
  color: var(--color-text-light);
}
.comparison__cell--highlight.comparison__cell--small-text {
  color: var(--color-primary);
}

@media (max-width: 600px) {
  .comparison__cell--small-text {
    font-size: 0.6rem;
  }
}

/* ========== PRICING ========== */
.pricing {
  padding: 80px 0;
  background: var(--color-bg);
}

.pricing__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

@media (min-width: 600px) {
  .pricing__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .pricing__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing__card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
}

.pricing__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pricing__card--featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.pricing__card--featured:hover {
  box-shadow: var(--shadow-lg);
}

.pricing__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 50px;
  white-space: nowrap;
}

.pricing__card-header {
  margin-bottom: 24px;
}

.pricing__plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.pricing__price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 12px;
}

.pricing__amount {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-text);
}

.pricing__period {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.pricing__desc {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.pricing__features {
  list-style: none;
  text-align: left;
  margin-bottom: 24px;
  flex: 1;
}

.pricing__features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  padding-left: 28px;
}

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

.pricing__features li::before {
  content: "\2713";
  position: absolute;
  left: 4px;
  color: var(--color-secondary);
  font-weight: 700;
}

.pricing__cta {
  width: 100%;
}

.pricing__note {
  text-align: center;
  margin-top: 40px;
  font-size: 0.9rem;
  color: var(--color-text-light);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.pricing__note a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
}

.pricing__note a:hover {
  color: var(--color-primary-dark);
}

/* ========== PLATFORMS ========== */
.platforms {
  padding: 80px 0;
  background: var(--color-bg-white);
}

.platforms__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}

@media (min-width: 500px) {
  .platforms__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .platforms__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.platform-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: all var(--transition);
  position: relative;
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.platform-card--soon {
  opacity: 0.7;
}

.platform-card--soon:hover {
  opacity: 1;
}

.platform-card__badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--color-bg);
  color: var(--color-text-light);
  font-size: 0.65rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.platform-card__icon {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
}

.platform-card__icon svg {
  width: 100%;
  height: 100%;
}

.platform-card h3 {
  font-size: 1.05rem;
  color: var(--color-text);
}

.platform-card p {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 1.4;
  flex: 1;
}

.btn--disabled {
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}

/* ========== CTA BANNER ========== */
.cta-banner {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #8B7CF6 50%, var(--color-secondary) 100%);
}

.cta-banner__inner {
  text-align: center;
  color: #fff;
}

.cta-banner__inner h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.cta-banner__inner p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

/* ========== FOOTER ========== */
.footer {
  padding: 48px 0 24px;
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
}

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

.footer__brand .navbar__logo {
  color: #fff;
  margin-bottom: 8px;
}

.footer__tagline {
  font-size: 0.9rem;
  opacity: 0.6;
}

.footer__links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.footer__links a {
  font-size: 0.9rem;
  transition: color var(--transition);
}
.footer__links a:hover {
  color: #fff;
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer__made-by {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
}

.footer__webbit {
  display: inline-flex;
  align-items: center;
}

.footer__webbit-logo {
  height: 24px;
  width: auto;
  opacity: 0.6;
  transition: opacity var(--transition);
  filter: brightness(0) invert(1);
}
.footer__webbit-logo:hover {
  opacity: 1;
}

.footer__copy {
  font-size: 0.8rem;
  opacity: 0.5;
}

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
  }
  .footer__brand {
    flex: 1;
  }
  .footer__links {
    flex: 1;
    justify-content: center;
  }
  .footer__bottom {
    flex: 0 0 100%;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* ========== DESKTOP ENHANCEMENTS ========== */
@media (min-width: 768px) {
  .hero {
    padding: 120px 0 80px;
  }
  .hero__inner {
    flex-direction: row;
    text-align: left;
  }
  .hero__content {
    text-align: left;
    flex: 1;
  }
  .hero__title {
    font-size: 3rem;
  }
  .hero__actions {
    justify-content: flex-start;
  }
  .hero__visual {
    flex: 1;
  }
  .section__title {
    font-size: 2.4rem;
  }
  .cta-banner__inner h2 {
    font-size: 2.6rem;
  }
}

@media (min-width: 1024px) {
  .hero__title {
    font-size: 3.4rem;
  }
  .p2p-device__screen {
    width: 110px;
    height: 130px;
  }
  .p2p-connection {
    width: 180px;
  }
}