/* ========================================
   SKULT — Site Vitrine
   Theme: Dark + Blue Accent (#1f59ff)
   ======================================== */

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

:root {
  --color-bg: #050505;
  --color-bg-alt: #0a0a0a;
  --color-surface: #111111;
  --color-surface-hover: #1a1a1a;
  --color-border: #1f1f1f;
  --color-border-light: #2a2a2a;
  --color-text: #ffffff;
  --color-text-secondary: #a0a0a0;
  --color-text-muted: #606060;
  --color-primary: #1f59ff;
  --color-primary-light: #4a7aff;
  --color-primary-dark: #1545cc;
  --color-primary-glow: rgba(31, 89, 255, 0.15);
  --color-primary-glow-strong: rgba(31, 89, 255, 0.3);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

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

.section {
  padding: 120px 0;
  position: relative;
}

/* --- Typography --- */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 72px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-glow);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 540px;
  margin: 0 auto;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, #52b4f8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-family);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-sm {
  font-size: 14px;
  padding: 10px 20px;
}

.btn-lg {
  font-size: 16px;
  padding: 16px 32px;
  border-radius: var(--radius-lg);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 24px rgba(31, 89, 255, 0.3);
  -webkit-tap-highlight-color: transparent;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border-light);
  -webkit-tap-highlight-color: transparent;
}

@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover {
    background: var(--color-primary-light);
    box-shadow: 0 8px 32px rgba(31, 89, 255, 0.4);
    transform: translateY(-2px);
  }

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

.btn-primary:active {
  background: var(--color-primary-dark);
  transform: scale(0.97);
}

.btn-outline:active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: scale(0.97);
}

.btn-full {
  width: 100%;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(5, 5, 5, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
}

.footer-logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
  margin-bottom: 12px;
}

.logo-text {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 0.1em;
  background: linear-gradient(135deg, #fff 0%, #a0a0a0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

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

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

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

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-gradient {
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 900px;
  background: radial-gradient(circle, rgba(31, 89, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black 20%, transparent 100%);
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 40px;
}

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


/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(31, 89, 255, 0.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card::after {
  content: '';
  position: absolute;
  top: -1px;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(31, 89, 255, 0.4), transparent);
  border-radius: 1px;
}

@media (hover: hover) and (pointer: fine) {
  .feature-card:hover {
    border-color: rgba(31, 89, 255, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
  }

  .feature-card:hover::before {
    opacity: 1;
  }
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* --- Steps --- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-card {
  text-align: center;
  padding: 40px 28px;
}

.step-number {
  font-size: 4rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary) 0%, rgba(31, 89, 255, 0.2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 24px;
}

.step-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- CTA Section --- */
.cta {
  padding: 160px 0;
}

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

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 40px;
}

/* --- Contact Page --- */
.contact-hero {
  padding: 160px 0 0;
  position: relative;
  overflow: visible;
}

.contact-hero .hero-bg {
  position: absolute;
  inset: 0;
  bottom: -200px;
}

.contact-hero .section-header {
  margin-bottom: 0;
}

.contact-section {
  padding-top: 48px;
  position: relative;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}

.contact-layout-centered {
  grid-template-columns: 1fr;
  max-width: 600px;
  margin: 0 auto;
}

/* --- Form Styles --- */
.contact-form {
  position: relative;
  background: linear-gradient(145deg, rgba(17, 17, 17, 0.8), rgba(10, 10, 10, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  padding: 44px 40px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03),
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 0 80px rgba(31, 89, 255, 0.04);
}

.contact-form::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(31, 89, 255, 0.4), transparent);
  border-radius: 1px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  font-family: var(--font-family);
  font-size: 15px;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: all var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a0a0a0' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
  background-color: rgba(255, 255, 255, 0.04);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: rgba(31, 89, 255, 0.5);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 3px rgba(31, 89, 255, 0.1), 0 0 20px rgba(31, 89, 255, 0.05);
}

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

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .btn-full {
  margin-top: 6px;
  border-radius: var(--radius-md);
}

.form-success {
  display: none;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  padding: 16px 20px;
  background: rgba(31, 89, 255, 0.06);
  border: 1px solid rgba(31, 89, 255, 0.15);
  border-radius: var(--radius-md);
}

.form-success.show {
  display: flex;
}

.form-success p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin: 0;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 60px 0 32px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 60px;
  margin-bottom: 48px;
}


.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  transition: color var(--transition);
}

@media (hover: hover) and (pointer: fine) {
  .footer-col a:hover {
    color: var(--color-text);
  }
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* --- Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* --- Legal pages --- */
.legal-section {
  padding-top: 48px;
  position: relative;
}

.legal-content {
  max-width: 760px;
  margin: 0 auto;
  color: var(--color-text-secondary);
  line-height: 1.8;
  font-size: 0.95rem;
}

.legal-content h2 {
  color: var(--color-text);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 40px 0 12px;
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p {
  margin-bottom: 12px;
}

.legal-content ul {
  margin: 0 0 16px 20px;
  padding: 0;
  list-style: disc;
}

.legal-content ul li {
  margin-bottom: 6px;
}

.legal-content a {
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity 0.2s;
}

.legal-content a:hover {
  opacity: 0.8;
}

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

/* --- iPhone-only App Store button enhancement --- */
.ios-only {
  display: none;
}

body.is-ios .ios-only {
  display: inline-flex;
}

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

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .section-header {
    margin: 0 auto 48px;
  }

  .section-title {
    font-size: clamp(1.6rem, 6vw, 2.5rem);
    margin-bottom: 14px;
  }

  .section-subtitle {
    font-size: 0.95rem;
  }

  .section-tag {
    font-size: 11px;
    padding: 5px 12px;
    margin-bottom: 14px;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(5, 5, 5, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 998;
  }

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

  .nav-links a {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
  }

  .mobile-menu-btn {
    display: flex;
    z-index: 999;
  }

  .nav-actions .btn {
    display: none;
  }

  .hero {
    min-height: 100vh;
    min-height: 100dvh;
    padding: 0 0;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .hero-content {
    padding: 0 8px;
  }

  .hero-title {
    font-size: clamp(2rem, 9vw, 3rem);
    margin-bottom: 16px;
  }

  .hero-subtitle {
    font-size: 0.95rem;
    margin: 0 auto 32px;
    max-width: 400px;
  }

  .hero-cta {
    gap: 12px;
  }

  .hero-gradient {
    width: 500px;
    height: 500px;
    top: -20%;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .feature-card {
    padding: 20px 16px;
  }

  .feature-icon {
    margin-bottom: 12px;
  }

  .feature-icon svg {
    width: 22px;
    height: 22px;
  }

  .feature-card h3 {
    font-size: 0.9rem;
    margin-bottom: 6px;
  }

  .feature-card p {
    font-size: 0.8rem;
    line-height: 1.5;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .step-card {
    padding: 28px 20px;
  }

  .step-number {
    font-size: 2.5rem;
    margin-bottom: 14px;
  }

  .step-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
  }

  .step-card p {
    font-size: 0.85rem;
  }

  .cta {
    padding: 72px 0;
  }

  .contact-hero {
    padding: 120px 0 0;
  }

  .contact-form {
    padding: 28px 20px;
    border-radius: var(--radius-lg);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-group {
    margin-bottom: 14px;
  }

  .form-group label {
    font-size: 12px;
    margin-bottom: 6px;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    font-size: 16px;
    padding: 12px 14px;
  }

  .btn-lg {
    font-size: 15px;
    padding: 14px 28px;
  }

  .footer {
    padding: 32px 0 20px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 24px;
    text-align: center;
  }

  .footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .footer-brand p {
    font-size: 0.8rem;
  }

  .footer-links {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    text-align: center;
  }

  .footer-col a {
    margin-bottom: 8px;
    font-size: 13px;
  }

  .footer-col h4 {
    font-size: 12px;
    margin-bottom: 10px;
  }

  .footer-bottom {
    padding-top: 16px;
  }

  .footer-bottom p {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    min-height: 100vh;
    min-height: 100dvh;
    padding: 0;
  }

  .hero-title {
    font-size: clamp(1.8rem, 10vw, 2.5rem);
  }

  .hero-subtitle {
    font-size: 0.88rem;
    line-height: 1.6;
    max-width: 320px;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

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

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .feature-card {
    padding: 16px 12px;
  }

  .feature-card h3 {
    font-size: 0.85rem;
  }

  .feature-card p {
    font-size: 0.75rem;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .section-title {
    font-size: clamp(1.5rem, 7vw, 2rem);
  }

  .footer-content {
    gap: 20px;
    margin-bottom: 20px;
  }

  .footer-links {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .footer-col a {
    font-size: 12px;
    margin-bottom: 6px;
  }

  .footer-col h4 {
    font-size: 11px;
    margin-bottom: 8px;
  }
}