/* ============================================
   singer.llc — Creative Design System
   ============================================ */

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

:root {
  --color-bg: #f8f9fc;
  --color-surface: #ffffff;
  --color-text: #111827;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-green: #059669;
  --color-green-light: #ecfdf5;
  --color-purple: #7c3aed;
  --color-purple-light: #f5f3ff;
  --color-pink: #db2777;
  --color-orange: #ea580c;
  --color-border: #e5e7eb;
  --color-dark: #0f172a;
  --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-logo: "Pacifico", cursive;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --max-width: 1200px;
  --section-padding: clamp(80px, 10vw, 140px);
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  letter-spacing: 0.02em;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(24px, 5vw, 60px);
}

/* --- Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 1s var(--ease-expo), transform 1s var(--ease-expo);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }
.reveal-delay-4 { transition-delay: 0.6s; }
.reveal-delay-5 { transition-delay: 0.75s; }

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(248, 249, 252, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.header.scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(255, 255, 255, 0.95);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(24px, 5vw, 60px);
}
.logo {
  font-family: var(--font-logo);
  font-size: 1.5rem;
  color: var(--color-primary);
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.3s ease;
}
.nav a:hover { color: var(--color-text); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: 100px;
  font-weight: 600;
  transition: all 0.3s ease;
}
.nav-cta:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

/* Mobile menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 32px;
  position: relative;
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text);
  position: absolute;
  left: 6px;
  transition: all 0.3s ease;
}
.menu-toggle span:nth-child(1) { top: 10px; }
.menu-toggle span:nth-child(2) { top: 15px; }
.menu-toggle span:nth-child(3) { top: 20px; }
.menu-toggle.active span:nth-child(1) { top: 15px; transform: rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { top: 15px; transform: rotate(-45deg); }

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}
.hero-gradient {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-gradient.blue { background: linear-gradient(135deg, #2563eb 0%, #312e81 100%); }
.hero-gradient.green { background: linear-gradient(135deg, #059669 0%, #0f766e 100%); }
.hero-gradient.purple { background: linear-gradient(135deg, #7c3aed 0%, #312e81 100%); }
.hero-gradient.pink { background: linear-gradient(135deg, #7c3aed 0%, #db2777 100%); }

.hero-gradient::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 40%);
}

.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
}
.hero-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 20px;
  padding: 6px 16px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 100px;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  max-width: 14em;
}
.hero-description {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  opacity: 0.8;
  line-height: 2;
  max-width: 36em;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Floating shapes */
.hero-shape {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  z-index: 1;
  animation: float 20s ease-in-out infinite;
}
.hero-shape-1 { width: 400px; height: 400px; top: -100px; right: -100px; animation-delay: 0s; }
.hero-shape-2 { width: 200px; height: 200px; bottom: 10%; right: 20%; animation-delay: -5s; }
.hero-shape-3 { width: 300px; height: 300px; bottom: -50px; left: -50px; animation-delay: -10s; }

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(10px, -20px) rotate(2deg); }
  66% { transform: translate(-10px, 10px) rotate(-1deg); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.3s var(--ease);
  cursor: pointer;
  border: none;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.3);
}
.btn-white { background: #fff; color: var(--color-text); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.btn-outline-white { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.4); }
.btn-outline-white:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
.btn-outline { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }
.btn-outline:hover { border-color: var(--color-text); transform: translateY(-2px); }
.btn-green { background: var(--color-green); color: #fff; }
.btn-green:hover { background: #047857; transform: translateY(-2px); box-shadow: 0 8px 30px rgba(5, 150, 105, 0.3); }
.btn-purple { background: var(--color-purple); color: #fff; }
.btn-purple:hover { background: #6d28d9; transform: translateY(-2px); box-shadow: 0 8px 30px rgba(124, 58, 237, 0.3); }
.btn-arrow::after { content: "\2192"; transition: transform 0.3s ease; }
.btn-arrow:hover::after { transform: translateX(4px); }

/* --- Section --- */
.section { padding: var(--section-padding) 0; }
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.section-description {
  font-size: clamp(0.9375rem, 1.2vw, 1.0625rem);
  color: var(--color-text-secondary);
  line-height: 2;
  max-width: 40em;
}
.section-header { margin-bottom: clamp(48px, 6vw, 80px); }
.section-alt { background: var(--color-surface); }

/* --- Creative Cards --- */
.card-grid {
  display: grid;
  gap: 24px;
}
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: clamp(28px, 3vw, 40px);
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: 20px 20px 0 0;
  opacity: 0;
  transition: opacity 0.4s ease;
}
.card:hover::before { opacity: 1; }
.card.accent-blue::before { background: linear-gradient(90deg, #2563eb, #60a5fa); }
.card.accent-green::before { background: linear-gradient(90deg, #059669, #34d399); }
.card.accent-purple::before { background: linear-gradient(90deg, #7c3aed, #a78bfa); }
.card.accent-orange::before { background: linear-gradient(90deg, #ea580c, #fb923c); }
.card.accent-pink::before { background: linear-gradient(90deg, #db2777, #f472b6); }

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
  margin-bottom: 20px;
  color: #fff;
}
.card-icon.blue { background: linear-gradient(135deg, #2563eb, #3b82f6); }
.card-icon.green { background: linear-gradient(135deg, #059669, #10b981); }
.card-icon.purple { background: linear-gradient(135deg, #7c3aed, #8b5cf6); }
.card-icon.orange { background: linear-gradient(135deg, #ea580c, #f97316); }
.card-icon.pink { background: linear-gradient(135deg, #db2777, #ec4899); }

.card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.9;
}
.card ul li {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding: 5px 0 5px 20px;
  position: relative;
}
.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--color-dark);
  border-radius: 20px;
  overflow: hidden;
}
.stat-item {
  padding: clamp(28px, 4vw, 48px);
  text-align: center;
  color: #fff;
  position: relative;
}
.stat-item + .stat-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: rgba(255,255,255,0.1);
}
.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.2;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 0.8125rem;
  opacity: 0.6;
  margin-top: 4px;
}

/* --- Course Card --- */
.course-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  overflow: hidden;
  transition: all 0.4s var(--ease);
}
.course-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.course-header {
  padding: clamp(28px, 3vw, 40px);
  color: #fff;
  position: relative;
}
.course-header.blue { background: linear-gradient(135deg, #2563eb, #312e81); }
.course-header.purple { background: linear-gradient(135deg, #7c3aed, #312e81); }
.course-header.green { background: linear-gradient(135deg, #059669, #0f766e); }
.course-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 100px;
  margin-bottom: 16px;
}
.course-header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.course-price {
  font-size: 2rem;
  font-weight: 900;
}
.course-price small {
  font-size: 0.5em;
  font-weight: 500;
  opacity: 0.8;
}
.course-body {
  padding: clamp(28px, 3vw, 40px);
}
.course-meta {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.course-meta i {
  color: var(--color-primary);
  margin-right: 6px;
}

/* --- Curriculum Timeline --- */
.timeline {
  position: relative;
  padding-left: 32px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  position: relative;
  margin-bottom: 24px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
}
.timeline-item h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.timeline-item p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* --- Steps --- */
.steps-creative {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.step-item {
  text-align: center;
  counter-increment: step;
  position: relative;
}
.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-purple));
  color: #fff;
  font-size: 1.25rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.step-item h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-item p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* --- Pricing Table --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}
.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: clamp(28px, 3vw, 40px);
  text-align: center;
  transition: all 0.4s var(--ease);
}
.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
  position: relative;
}
.pricing-card.featured::before {
  content: "おすすめ";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 100px;
}
.pricing-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.pricing-amount {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--color-primary);
  margin-bottom: 4px;
}
.pricing-amount small {
  font-size: 0.4em;
  font-weight: 500;
  color: var(--color-text-secondary);
}
.pricing-period {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}
.pricing-features {
  text-align: left;
  margin-bottom: 28px;
}
.pricing-features li {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding: 8px 0;
  padding-left: 28px;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-features li::before {
  content: "\e12c";
  font-family: "remixicon";
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-size: 1rem;
}

/* --- Testimonial --- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: clamp(28px, 3vw, 40px);
}
.testimonial-quote {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  font-style: italic;
}
.testimonial-author {
  font-size: 0.9375rem;
  font-weight: 700;
}
.testimonial-role {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* --- Case Study --- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: clamp(28px, 3vw, 40px);
}
.case-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.case-tag.blue { background: var(--color-primary-light); color: var(--color-primary); }
.case-tag.green { background: var(--color-green-light); color: var(--color-green); }
.case-tag.purple { background: var(--color-purple-light); color: var(--color-purple); }
.case-card h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: 8px; }
.case-card p { font-size: 0.875rem; color: var(--color-text-secondary); line-height: 1.8; margin-bottom: 16px; }
.case-result {
  font-size: 1.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Contact Form --- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
}
.form-label .required {
  color: #ef4444;
  margin-left: 4px;
}
.form-input,
.form-select,
.form-textarea {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  background: var(--color-surface);
  color: var(--color-text);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.form-textarea { min-height: 140px; resize: vertical; }

/* --- FAQ --- */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--color-surface);
}
.faq-question {
  padding: 20px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.3s ease;
}
.faq-question:hover { background: var(--color-bg); }
.faq-question .icon {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
  color: var(--color-text-muted);
}
.faq-item.open .faq-question .icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.9;
}

/* --- CTA Section --- */
.cta-section {
  background: var(--color-dark);
  color: #fff;
  padding: var(--section-padding) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(124, 58, 237, 0.1) 0%, transparent 40%);
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section .section-label { color: rgba(255,255,255,0.4); }
.cta-section h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-section p {
  color: rgba(255,255,255,0.6);
  font-size: 1rem;
  max-width: 32em;
  margin: 0 auto 36px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.5);
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { font-size: 0.8125rem; line-height: 1.9; }
.footer h4 {
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.footer-links a {
  display: block;
  font-size: 0.8125rem;
  padding: 4px 0;
  transition: color 0.3s ease;
}
.footer-links a:hover { color: #fff; }
.footer-contact p {
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.75rem;
  text-align: center;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .nav { display: none; }
  .menu-toggle { display: block; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    padding: 40px;
    gap: 24px;
    z-index: 99;
  }
  .nav.open a { font-size: 1.125rem; }
  .card-grid.cols-3,
  .card-grid.cols-4,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .testimonial-grid,
  .case-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .card-grid.cols-2,
  .card-grid.cols-3,
  .card-grid.cols-4,
  .pricing-grid,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  .stats-bar .stat-item + .stat-item::before { display: none; }
  .hero-actions, .cta-actions { flex-direction: column; }
  .btn { justify-content: center; width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
  .steps-creative { grid-template-columns: 1fr; }
}