@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --artro-canvas: #f8fafc;
  --artro-surface: #ffffff;
  --artro-dark-bg: #0f172a;
  --artro-brand: #0d9488;
  --artro-brand-glow: #14b8a6;
  --artro-brand-dark: #0f766e;
  --artro-accent: #0284c7;
  --artro-vibe: #8b5cf6;
  --artro-ink: #0f172a;
  --artro-subtle-ink: #475569;
  --artro-border-tint: #e2e8f0;
  --artro-shadow-deep: 0 20px 60px rgba(15, 23, 42, 0.15);
  --artro-shadow-floating: 0 30px 80px rgba(15, 23, 42, 0.22);
  --artro-shadow-panel: 0 8px 24px rgba(15, 23, 42, 0.08);
  --artro-radius-soft: 16px;
  --artro-radius-pill: 999px;
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  background-color: var(--artro-canvas);
  color: var(--artro-ink);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Scroll animation indicator */
.artro-scroll-tracker {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--artro-brand), var(--artro-accent), var(--artro-vibe));
  transform-origin: left;
  z-index: 10000;
  animation: artro-bar-grow auto linear;
  animation-timeline: scroll(root);
}

@keyframes artro-bar-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* Preset K Header */
.artro-top-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  padding: 1.2rem 2rem;
}

.artro-header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.artro-brand-anchor {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--artro-ink);
}

.artro-brand-anchor svg {
  width: 36px;
  height: 36px;
  fill: var(--artro-brand);
}

.artro-brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
  color: var(--artro-dark-bg);
}

.artro-nav-toggle-checkbox {
  display: none;
}

.artro-burger-label {
  display: none;
  cursor: pointer;
  padding: 0.5rem;
}

.artro-burger-label span,
.artro-burger-label span::before,
.artro-burger-label span::after {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--artro-ink);
  position: relative;
  transition: all 0.3s ease;
}

.artro-burger-label span::before {
  content: '';
  position: absolute;
  top: -8px;
}

.artro-burger-label span::after {
  content: '';
  position: absolute;
  top: 8px;
}

.artro-nav-deck {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.artro-nav-link {
  text-decoration: none;
  color: var(--artro-subtle-ink);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.artro-nav-link:hover {
  color: var(--artro-brand);
}

.artro-nav-action-pill {
  background: var(--artro-brand);
  color: #ffffff !important;
  padding: 0.6rem 1.4rem;
  border-radius: var(--artro-radius-pill);
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.3);
  transition: transform 0.2s ease, background 0.2s ease;
}

.artro-nav-action-pill:hover {
  background: var(--artro-brand-dark);
  transform: translateY(-2px);
}

/* Preset K Hero: 100vh + Panel Stack */
.artro-hero-viewport {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(rgba(15, 23, 42, 0.65), rgba(15, 23, 42, 0.75)), url('img/bg.webp');
  background-size: cover;
  background-position: center;
  padding: 4rem 1.5rem;
}

.artro-stack-container {
  position: relative;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
}

.artro-stack-card-back {
  position: absolute;
  inset: 0;
  background: var(--artro-accent);
  border-radius: 24px;
  opacity: 0.4;
  transform: rotate(-3deg) scale(0.96) translateY(20px);
  z-index: 1;
}

.artro-stack-card-mid {
  position: absolute;
  inset: 0;
  background: var(--artro-brand);
  border-radius: 24px;
  opacity: 0.6;
  transform: rotate(2deg) scale(0.98) translateY(10px);
  z-index: 2;
}

.artro-stack-card-front {
  position: relative;
  z-index: 3;
  background: #ffffff;
  padding: 3.5rem 2.5rem;
  border-radius: 24px;
  box-shadow: var(--artro-shadow-floating);
  text-align: center;
}

.artro-hero-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--artro-dark-bg);
  margin-bottom: 1.25rem;
}

.artro-hero-description {
  font-size: 1.1rem;
  color: var(--artro-subtle-ink);
  margin-bottom: 2rem;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.artro-hero-action-btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--artro-brand), var(--artro-accent));
  color: #ffffff;
  font-family: var(--font-display);
  font-weight: 700;
  text-decoration: none;
  padding: 1.1rem 2.8rem;
  border-radius: var(--artro-radius-pill);
  box-shadow: 0 10px 25px rgba(13, 148, 136, 0.4);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.artro-hero-action-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(13, 148, 136, 0.5);
}

/* Preset K Levitating Features (3 Columns) */
.artro-floating-features-wrap {
  max-width: 1200px;
  margin: -60px auto 5rem;
  padding: 0 1.5rem;
  position: relative;
  z-index: 10;
}

.artro-features-grid-trio {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.artro-levitate-card {
  background: var(--artro-surface);
  padding: 2.5rem 2rem;
  border-radius: var(--artro-radius-soft);
  box-shadow: var(--artro-shadow-deep);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
  border: 1px solid rgba(226, 232, 240, 0.8);
}

.artro-levitate-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 30px 70px rgba(15, 23, 42, 0.22);
}

.artro-card-badge-icon {
  width: 56px;
  height: 56px;
  background: rgba(13, 148, 136, 0.1);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--artro-brand);
}

.artro-card-badge-icon svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.artro-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--artro-ink);
  margin-bottom: 0.75rem;
}

.artro-card-text {
  color: var(--artro-subtle-ink);
  font-size: 0.98rem;
}

/* Preset K Split Content Section */
.artro-split-content-stage {
  max-width: 1200px;
  margin: 5rem auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.artro-floating-frame-img {
  width: 100%;
  border-radius: 20px;
  box-shadow: var(--artro-shadow-floating);
  object-fit: cover;
  height: 420px;
}

.artro-raised-text-panel {
  background: var(--artro-surface);
  padding: 2.8rem;
  border-radius: 16px;
  box-shadow: var(--artro-shadow-panel);
  border: 1px solid var(--artro-border-tint);
}

.artro-panel-tag {
  color: var(--artro-brand);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
  display: block;
}

.artro-panel-heading {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--artro-ink);
  margin-bottom: 1rem;
  line-height: 1.25;
}

.artro-panel-body {
  color: var(--artro-subtle-ink);
  font-size: 1.02rem;
  margin-bottom: 1.5rem;
}

/* Preset K Secondary Card Banner */
.artro-banner-card-stage {
  max-width: 1200px;
  margin: 5rem auto;
  padding: 0 1.5rem;
}

.artro-floating-card-bg2 {
  background-image: linear-gradient(90deg, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.6)), url('img/bg2.webp');
  background-size: cover;
  background-position: center;
  border-radius: 24px;
  padding: 4rem 3rem;
  color: #ffffff;
  box-shadow: var(--artro-shadow-deep);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  max-width: 900px;
  margin: 0 auto;
}

.artro-bg2-heading {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.artro-bg2-text {
  font-size: 1.1rem;
  max-width: 650px;
  margin-bottom: 2rem;
  color: #e2e8f0;
}

/* Preset K How It Works (Elevated Pill Cards) */
.artro-steps-section {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 1.5rem;
  text-align: center;
}

.artro-section-heading {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--artro-ink);
  margin-bottom: 3rem;
}

.artro-pill-steps-flex {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 950px;
  margin: 0 auto;
}

.artro-elevated-pill-card {
  background: var(--artro-surface);
  border-radius: var(--artro-radius-pill);
  padding: 1.5rem 2.8rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  gap: 2rem;
  text-align: left;
  border: 1px solid var(--artro-border-tint);
  transition: transform 0.2s ease;
}

.artro-elevated-pill-card:hover {
  transform: scale(1.02);
}

.artro-pill-number {
  background: var(--artro-brand);
  color: #ffffff;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.artro-pill-content h4 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--artro-ink);
}

.artro-pill-content p {
  color: var(--artro-subtle-ink);
  font-size: 0.92rem;
}

/* Preset K CTA Strip */
.artro-dark-cta-strip {
  background-color: var(--artro-dark-bg);
  background-image: radial-gradient(circle at 50% 50%, rgba(13, 148, 136, 0.25), transparent 70%);
  padding: 6rem 1.5rem;
  position: relative;
  margin-top: 4rem;
}

.artro-floating-modal-panel {
  max-width: 65%;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  padding: 3.5rem 2.5rem;
  text-align: center;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
  color: #ffffff;
}

.artro-modal-heading {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.artro-modal-text {
  font-size: 1.05rem;
  color: #cbd5e1;
  margin-bottom: 2rem;
}

/* Expert Page Specifics */
.artro-expert-hero-box {
  background: var(--artro-surface);
  max-width: 1000px;
  margin: 3rem auto;
  border-radius: 24px;
  box-shadow: var(--artro-shadow-floating);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.artro-frame-bg3 {
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--artro-shadow-deep);
}

.artro-frame-bg3 img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.artro-stats-pill-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 900px;
  margin: 4rem auto;
  padding: 0 1.5rem;
}

.artro-stat-pill {
  background: var(--artro-surface);
  border-radius: var(--artro-radius-pill);
  padding: 1.8rem 2rem;
  box-shadow: var(--artro-shadow-panel);
  text-align: center;
  border: 1px solid var(--artro-border-tint);
}

.artro-stat-digit {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--artro-brand);
  display: block;
}

.artro-stat-label {
  font-size: 0.9rem;
  color: var(--artro-subtle-ink);
  font-weight: 600;
}

/* Reserve Page Specifics */
.artro-reserve-stage {
  max-width: 1100px;
  margin: 4rem auto;
  padding: 0 1.5rem;
}

.artro-reserve-floating-card {
  background: var(--artro-surface);
  border-radius: 24px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.12);
  padding: 3.5rem 3rem;
  border: 1px solid var(--artro-border-tint);
  margin-bottom: 4rem;
}

.artro-reserve-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.artro-form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.artro-form-group label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--artro-ink);
}

.artro-input-ctrl {
  width: 100%;
  padding: 1rem 1.2rem;
  border: 2px solid var(--artro-border-tint);
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.artro-input-ctrl:focus {
  outline: none;
  border-color: var(--artro-brand);
}

.artro-check-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.artro-check-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--artro-brand);
}

.artro-check-label {
  font-size: 0.88rem;
  color: var(--artro-subtle-ink);
}

.artro-check-label a {
  color: var(--artro-brand);
  text-decoration: underline;
}

.artro-info-grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.artro-info-num-card {
  background: var(--artro-surface);
  padding: 2rem;
  border-radius: 16px;
  box-shadow: var(--artro-shadow-panel);
  border: 1px solid var(--artro-border-tint);
}

.artro-badge-list {
  list-style: none;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.artro-badge-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--artro-subtle-ink);
}

.artro-dot-badge {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--artro-brand);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.artro-faq-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 3rem;
}

.artro-faq-card {
  background: var(--artro-surface);
  border-radius: 16px;
  padding: 1.8rem 2rem;
  box-shadow: var(--artro-shadow-panel);
  border: 1px solid var(--artro-border-tint);
  transition: transform 0.2s ease;
}

.artro-faq-card:hover {
  transform: translateY(-4px);
}

.artro-faq-q {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--artro-ink);
  margin-bottom: 0.5rem;
}

.artro-faq-a {
  color: var(--artro-subtle-ink);
  font-size: 0.95rem;
}

/* Static Pages (Privacy, Terms, Thank) */
.artro-doc-article {
  max-width: 900px;
  margin: 4rem auto;
  padding: 3rem 2.5rem;
  background: var(--artro-surface);
  border-radius: 20px;
  box-shadow: var(--artro-shadow-panel);
}

.artro-doc-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--artro-dark-bg);
}

.artro-doc-paragraph {
  color: var(--artro-subtle-ink);
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

/* Cookie Banner */
.artro-cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--artro-dark-bg);
  color: #ffffff;
  padding: 1.5rem 2rem;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.2);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.artro-cookie-text {
  font-size: 0.95rem;
  color: #cbd5e1;
}

.artro-cookie-actions {
  display: flex;
  gap: 1rem;
  flex-shrink: 0;
}

.artro-cookie-btn-accept {
  background: var(--artro-brand);
  color: #ffffff;
  border: none;
  padding: 0.6rem 1.4rem;
  border-radius: var(--artro-radius-pill);
  font-weight: 600;
  cursor: pointer;
}

.artro-cookie-btn-decline {
  background: transparent;
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.6rem 1.4rem;
  border-radius: var(--artro-radius-pill);
  font-weight: 600;
  cursor: pointer;
}

/* Footer */
.artro-site-footer {
  background: var(--artro-dark-bg);
  color: #94a3b8;
  padding: 4rem 1.5rem 2rem;
  margin-top: auto;
}

.artro-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.artro-footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 2rem;
}

.artro-footer-links {
  display: flex;
  gap: 1.8rem;
  list-style: none;
}

.artro-footer-link-item {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.artro-footer-link-item:hover {
  color: var(--artro-brand-glow);
}

.artro-disclaimer-box {
  background: rgba(255, 255, 255, 0.04);
  padding: 1.25rem 1.5rem;
  border-radius: 12px;
  border-left: 4px solid var(--artro-brand);
  font-size: 0.88rem;
  line-height: 1.5;
  color: #cbd5e1;
}

.artro-copyright-text {
  text-align: center;
  font-size: 0.85rem;
  color: #64748b;
}

/* Animations with Scroll View */
@supports (animation-timeline: view()) {
  .artro-levitate-card,
  .artro-raised-text-panel,
  .artro-elevated-pill-card,
  .artro-stat-pill {
    animation: artro-fade-up auto linear both;
    animation-timeline: view();
    animation-range: entry 10% cover 30%;
  }
}

@keyframes artro-fade-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive queries */
@media (max-width: 992px) {
  .artro-split-content-stage,
  .artro-expert-hero-box {
    grid-template-columns: 1fr;
  }

  .artro-floating-modal-panel {
    max-width: 90%;
  }

  .artro-pill-steps-flex {
    gap: 1rem;
  }

  .artro-elevated-pill-card {
    border-radius: 20px;
    padding: 1.5rem;
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .artro-burger-label {
    display: block;
  }

  .artro-nav-deck {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    display: none;
  }

  .artro-nav-toggle-checkbox:checked ~ .artro-nav-deck {
    display: flex;
  }

  .artro-stack-card-front {
    padding: 2.5rem 1.5rem;
  }

  .artro-cookie-banner {
    flex-direction: column;
    text-align: center;
  }

  .artro-stats-pill-grid {
    grid-template-columns: 1fr;
  }
}