/* ============================================
   KONZEPT — Brandbook Concept Studio
   Design System & Styles
   ============================================ */

/* ---- Variables ---- */
:root {
  --bg: #080808;
  --bg-alt: #0f0f0f;
  --surface: #141414;
  --surface-2: #1a1a1a;
  --border: #2a2a2a;
  --border-bright: #3a3a3a;

  --text: #f0f0f0;
  --text-dim: #888;
  --text-muted: #555;

  --accent: #8b5cf6;
  --accent-2: #ec4899;
  --accent-glow: rgba(139, 92, 246, 0.3);
  --gradient: linear-gradient(135deg, #8b5cf6, #ec4899);
  --gradient-subtle: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(236, 72, 153, 0.15));

  --font: 'Inter', -apple-system, system-ui, sans-serif;
  --font-heading: 'Space Grotesk', var(--font);
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;

  --max-w: 1200px;
  --section-pad: 120px 24px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { border: none; background: none; cursor: pointer; color: inherit; font: inherit; }

/* ---- Utility ---- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  background: rgba(8, 8, 8, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
}
.nav.scrolled {
  background: rgba(8, 8, 8, 0.9);
  border-bottom-color: var(--border);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 3px;
}
.nav-logo-mark {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 20px;
}
.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-size: 14px;
  color: var(--text-dim);
  transition: color 0.3s;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  font-size: 13px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 100px;
  background: var(--gradient);
  color: #fff;
  transition: transform 0.3s, box-shadow 0.3s;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}
#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}
.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 100px;
  margin-bottom: 32px;
  background: rgba(139, 92, 246, 0.08);
}
.hero-title {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.05;
  margin-bottom: 24px;
}
.hero-line {
  display: block;
  font-size: clamp(40px, 8vw, 80px);
}
.hero-line.accent {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.price-highlight {
  position: relative;
}
.price-highlight::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient);
  border-radius: 4px;
  opacity: 0.6;
}
.hero-desc {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 60px;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  z-index: 1;
}
.hero-scroll span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-muted);
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}
.scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0% { top: -100%; }
  100% { top: 100%; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  cursor: pointer;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  border: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px var(--accent-glow);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-bright);
}
.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(139, 92, 246, 0.08);
}
.btn-large {
  padding: 18px 40px;
  font-size: 16px;
}

/* ============================================
   SECTIONS (general)
   ============================================ */
.section {
  padding: var(--section-pad);
  max-width: var(--max-w);
  margin: 0 auto;
}
.section-dark {
  max-width: none;
  background: var(--bg-alt);
}
.section-dark > .section-header,
.section-dark > .about-grid,
.section-dark > .winwin,
.section-dark > .portfolio-grid,
.section-dark > .faq-list {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}
.section-header {
  margin-bottom: 64px;
}
.section-number {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 2px;
  display: block;
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
}
.section-desc {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 540px;
  line-height: 1.7;
}

/* ============================================
   PROCESS
   ============================================ */
.process-grid {
  display: flex;
  align-items: stretch;
  gap: 24px;
}
.process-card {
  flex: 1;
  padding: 40px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  transition: transform 0.3s, border-color 0.3s;
}
.process-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}
.process-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 20px;
}
.process-icon {
  margin-bottom: 20px;
  color: var(--accent);
}
.process-icon svg {
  display: block;
}
.process-card h3 {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
}
.process-card p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
}
.process-time {
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  padding: 6px 16px;
  background: rgba(139, 92, 246, 0.1);
  border-radius: 100px;
  display: inline-block;
}
.process-arrow {
  display: flex;
  align-items: center;
  font-size: 24px;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ============================================
   ABOUT
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 80px;
}
.about-card {
  padding: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.3s, border-color 0.3s;
}
.about-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}
.about-icon {
  margin-bottom: 16px;
  color: var(--accent);
}
.about-icon svg {
  display: block;
}
.about-card h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
}
.about-card p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
}

/* Win-Win */
.winwin {
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.winwin-card {
  flex: 1;
  padding: 48px 40px;
}
.winwin-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.winwin-card h3 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}
.winwin-card p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
}
.winwin-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px;
  position: relative;
}
.winwin-divider span {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 3px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.winwin-line {
  width: 1px;
  flex: 1;
  background: var(--border);
}

/* ============================================
   COMPARISON
   ============================================ */
.compare-grid {
  display: flex;
  align-items: stretch;
  gap: 0;
}
.compare-card {
  flex: 1;
  padding: 48px 40px;
  border: 1px solid var(--border);
}
.compare-old {
  background: var(--surface);
  border-radius: var(--radius) 0 0 var(--radius);
}
.compare-new {
  background: var(--surface-2);
  border-radius: 0 var(--radius) var(--radius) 0;
  border-color: var(--accent);
  position: relative;
}
.compare-new::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--gradient);
  z-index: -1;
  opacity: 0.3;
}
.compare-label {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.compare-new .compare-label {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border-bottom-color: rgba(139, 92, 246, 0.3);
}
.compare-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  font-size: 15px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.compare-icon {
  color: var(--text-dim);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}
.compare-icon svg {
  display: block;
}
.compare-new .compare-icon {
  color: var(--accent);
}
.compare-vs {
  display: flex;
  align-items: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  color: var(--text-muted);
  padding: 0 24px;
  background: var(--bg);
  z-index: 1;
}

/* ============================================
   PORTFOLIO
   ============================================ */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.portfolio-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.3s,
              box-shadow 0.4s;
}
.portfolio-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent);
  box-shadow: 0 20px 60px rgba(139, 92, 246, 0.15);
}
.portfolio-preview {
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.portfolio-preview-content {
  text-align: center;
  z-index: 1;
}
.preview-dots {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 12px;
}
.preview-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: block;
}
.preview-title {
  font-family: var(--font-heading);
}
.preview-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  margin-top: 6px;
}
.portfolio-info {
  padding: 24px;
}
.portfolio-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.portfolio-info h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.portfolio-info p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}
.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 8, 8, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
  backdrop-filter: blur(4px);
}
.portfolio-card:hover .portfolio-overlay { opacity: 1; }
.portfolio-overlay span {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 18px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   PRICING
   ============================================ */
.pricing-container {
  display: flex;
  justify-content: center;
}
.pricing-card {
  width: 100%;
  max-width: 520px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}
.pricing-glow {
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  height: 4px;
  background: var(--gradient);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.pricing-header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.pricing-name {
  font-family: var(--font-heading);
  font-size: 14px;
  letter-spacing: 4px;
  color: var(--accent);
  margin-bottom: 12px;
}
.pricing-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
}
.pricing-value {
  font-family: var(--font-heading);
  font-size: 64px;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.pricing-currency {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 600;
  color: var(--text-dim);
}
.pricing-period {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}
.pricing-features {
  margin-bottom: 40px;
}
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  font-size: 15px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.pricing-features .check {
  color: var(--accent);
  font-weight: 700;
  font-size: 16px;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}
.pricing-card .btn {
  width: 100%;
  justify-content: center;
}

/* ============================================
   FAQ
   ============================================ */
.faq-list {
  max-width: 700px;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 24px 0;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  text-align: left;
  transition: color 0.3s;
}
.faq-question:hover { color: var(--accent); }
.faq-toggle {
  font-size: 24px;
  font-weight: 300;
  color: var(--text-muted);
  transition: transform 0.3s;
  flex-shrink: 0;
  width: 32px;
  text-align: center;
}
.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1),
              padding 0.4s;
}
.faq-item.active .faq-answer {
  max-height: 300px;
}
.faq-answer p {
  padding-bottom: 24px;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.8;
}

/* ============================================
   CTA
   ============================================ */
.section-cta {
  max-width: none;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.section-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
}
.cta-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
}
.cta-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
}
.cta-content p {
  font-size: 17px;
  color: var(--text-dim);
  margin-bottom: 40px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 60px 24px;
  text-align: center;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 3px;
  margin-bottom: 12px;
}
.footer-mark {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.footer-note {
  font-size: 13px;
  color: var(--text-muted);
}

/* ============================================
   MODAL
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s, visibility 0.4s;
}
.modal.open {
  opacity: 1;
  visibility: visible;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
}
.modal-close {
  font-size: 20px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background 0.3s;
}
.modal-close:hover { background: var(--surface-2); }
.modal-iframe {
  flex: 1;
  width: 100%;
  border: none;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .portfolio-grid { grid-template-columns: 1fr; max-width: 500px; }
  .process-grid { flex-direction: column; }
  .process-arrow { 
    transform: rotate(90deg); 
    justify-content: center;
    padding: 8px 0;
  }
  .compare-grid { flex-direction: column; }
  .compare-old { border-radius: var(--radius) var(--radius) 0 0; }
  .compare-new { border-radius: 0 0 var(--radius) var(--radius); }
  .compare-vs { padding: 16px; justify-content: center; }
}

@media (max-width: 768px) {
  :root { --section-pad: 80px 20px; }

  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav { padding: 14px 20px; }

  /* Mobile Menu */
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(8, 8, 8, 0.95);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 0;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open li a {
    display: block;
    padding: 14px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--border);
  }

  .hero-stats { flex-direction: column; gap: 24px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .about-grid { grid-template-columns: 1fr; }
  .winwin { flex-direction: column; }
  .winwin-divider { flex-direction: row; padding: 16px 40px; }
  .winwin-line { width: auto; height: 1px; flex: 1; }
  .cta-actions { flex-direction: column; align-items: center; }
  .pricing-card { padding: 36px 24px; }
  .pricing-value { font-size: 48px; }
}