/* ==========================================
   CactusAI Landing — style.css
   ========================================== */

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

:root {
  --color-bg-primary:    #0D0D0D;
  --color-bg-secondary:  #1A0A2E;
  --color-bg-card:       #1C1C1E;
  --color-bg-glass:      rgba(255,255,255,0.05);

  --color-accent-yellow: #FFE000;
  --color-accent-green:  #22C55E;
  --color-accent-red:    #EF4444;
  --color-accent-purple: #7C3AED;
  --color-accent-blue:   #3B82F6;

  --color-text-primary:   #FFFFFF;
  --color-text-secondary: #A1A1AA;
  --color-text-muted:     #52525B;

  --color-border:        rgba(255,255,255,0.08);
  --color-border-accent: rgba(255,224,0,0.3);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --text-h1:      clamp(2rem, 5vw, 3.5rem);
  --text-h2:      clamp(1.5rem, 3vw, 2.5rem);
  --text-h3:      clamp(1.1rem, 2vw, 1.5rem);
  --text-body-lg: 1.125rem;
  --text-body:    1rem;
  --text-small:   0.875rem;
  --text-xs:      0.75rem;

  --container-max:   1200px;
  --container-pad-x: clamp(1rem, 5vw, 4rem);
  --section-pad-y:   clamp(4rem, 8vw, 8rem);
  --card-padding:    1.5rem;
  --card-radius:     1rem;
  --card-radius-lg:  1.5rem;

  --gap-sm: 0.75rem;
  --gap-md: 1.5rem;
  --gap-lg: 2rem;
  --gap-xl: 3rem;

  --shadow-card:        0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow-yellow: 0 0 40px rgba(255,224,0,0.15);
  --shadow-glow-purple: 0 0 40px rgba(124,58,237,0.2);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-family);
  font-size: var(--text-body);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* --- Utilities --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad-x);
}

.section-pad { padding: var(--section-pad-y) 0; }

.text-yellow  { color: var(--color-accent-yellow); }
.text-green   { color: var(--color-accent-green); }
.text-red     { color: var(--color-accent-red); }
.text-purple  { color: var(--color-accent-purple); }
.text-muted   { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.font-bold    { font-weight: 700; }
.font-black   { font-weight: 900; }

.glass-card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
}

.hero-gradient {
  background: linear-gradient(135deg, #0D0D0D 0%, #1A0A2E 50%, #0D0D0D 100%);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 52px;
  padding: 0 28px;
  border-radius: 12px;
  font-family: var(--font-family);
  font-size: var(--text-body);
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent-yellow);
  color: #000000;
}
.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,224,0,0.3);
}

.btn-outlined-white {
  background: transparent;
  color: #fff;
  border: 1.5px solid #fff;
}
.btn-outlined-white:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}

.btn-outlined-yellow {
  background: transparent;
  color: var(--color-accent-yellow);
  border: 1.5px solid var(--color-accent-yellow);
}
.btn-outlined-yellow:hover {
  background: rgba(255,224,0,0.1);
  transform: translateY(-2px);
}

.btn-outlined-purple {
  background: transparent;
  color: var(--color-accent-purple);
  border: 1.5px solid var(--color-accent-purple);
}
.btn-outlined-purple:hover {
  background: rgba(124,58,237,0.1);
  transform: translateY(-2px);
}

.btn-sm {
  height: 40px;
  padding: 0 18px;
  font-size: var(--text-small);
  border-radius: 8px;
}

/* ==========================================
   NAVIGATION
   ========================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  transition: background 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(13,13,13,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
}

.nav__logo span { color: var(--color-accent-yellow); }

/* ==========================================
   HERO
   ========================================== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__orb {
  position: absolute;
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
}

.hero__orb--purple {
  right: -10%; top: 20%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.2), transparent 70%);
  filter: blur(80px);
}

.hero__orb--yellow {
  left: -5%; bottom: 10%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,224,0,0.15), transparent 70%);
  filter: blur(60px);
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 60% 40%;
  gap: var(--gap-xl);
  align-items: center;
  width: 100%;
  padding-top: 80px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 6px 14px;
  border: 1px solid var(--color-accent-yellow);
  border-radius: 999px;
  font-size: var(--text-xs);
  color: var(--color-accent-yellow);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero__h1 {
  font-size: var(--text-h1);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero__sub {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  max-width: 540px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero__cta-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.hero__microcopy {
  font-size: var(--text-small);
  color: var(--color-text-muted);
}

/* Hero collage */
.hero__images {
  position: relative;
  height: 480px;
}

.hero__img {
  position: absolute;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  animation: heroImgIn 0.6s ease both;
}

.hero__img--main {
  width: 340px; height: 340px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: 0.1s;
}

.hero__img--tl {
  width: 220px; height: 220px;
  top: 0; right: 0;
  transform: rotate(-8deg);
  animation-delay: 0.3s;
}

.hero__img--bl {
  width: 240px; height: 240px;
  bottom: 0; left: 0;
  transform: rotate(6deg);
  animation-delay: 0.5s;
}

@keyframes heroImgIn {
  from { opacity: 0; transform: scale(0.8) var(--rot, rotate(0deg)); }
  to   { opacity: 1; transform: scale(1) var(--rot, rotate(0deg)); }
}

.hero__img-badge {
  position: absolute;
  bottom: 12px; left: 12px;
  padding: 4px 12px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  border-radius: 999px;
  font-size: var(--text-xs);
  white-space: nowrap;
}

.hero__img-wrapper {
  position: absolute;
}

.hero__img-wrapper--main {
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

.hero__img-wrapper--tl {
  top: 0; right: 0;
  transform: rotate(-8deg);
}

.hero__img-wrapper--bl {
  bottom: 0; left: 0;
  transform: rotate(6deg);
}

/* Image placeholders */
.img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  border-radius: 16px;
  background: linear-gradient(135deg, #1C1C2E, #2D1B4E);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  animation: heroImgIn 0.6s ease both;
  overflow: hidden;
  flex-direction: column;
  gap: 0.5rem;
}

.img-placeholder span.emoji { font-size: 2.5rem; }
.img-placeholder span.label {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.4);
  text-align: center;
  padding: 0 8px;
}

/* ==========================================
   PROBLEM
   ========================================== */
#problem {
  background: #F4F4F5;
  color: #0D0D0D;
}

#problem h2 { font-size: var(--text-h2); font-weight: 900; margin-bottom: 1rem; }
#problem .lead { font-size: var(--text-body-lg); margin-bottom: 2.5rem; color: #3f3f46; }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.problem-card {
  background: #fff;
  border: 1px solid #E4E4E7;
  border-radius: 16px;
  padding: 24px;
}

.problem-card__icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.problem-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #0D0D0D;
  margin-bottom: 0.4rem;
}

.problem-card__text { color: #52525B; font-size: var(--text-small); }

.problem-quote {
  border-left: 4px solid var(--color-accent-red);
  padding-left: 1.5rem;
  font-style: italic;
  font-size: var(--text-body-lg);
  max-width: 600px;
  margin: 0 auto;
  color: #3f3f46;
  line-height: 1.7;
}

/* ==========================================
   SOLUTION
   ========================================== */
#solution { background: var(--color-bg-primary); }
#solution h2 { font-size: var(--text-h2); font-weight: 900; margin-bottom: 1rem; }
#solution .lead { font-size: var(--text-body-lg); color: var(--color-text-secondary); margin-bottom: var(--gap-xl); max-width: 600px; }

.solution-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
  margin-bottom: var(--gap-xl);
}

.solution-card {
  border-radius: var(--card-radius-lg);
  padding: 32px 24px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.solution-card:hover { transform: translateY(-4px); }

.solution-card--featured {
  border-color: rgba(255,224,0,0.3) !important;
  box-shadow: 0 0 40px rgba(255,224,0,0.1);
}

.solution-card__icon { font-size: 3rem; margin-bottom: 1rem; }
.solution-card__title { font-size: var(--text-h3); font-weight: 700; margin-bottom: 0.75rem; }
.solution-card__text { color: var(--color-text-secondary); line-height: 1.7; }

/* Comparison table */
.compare-wrap {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: var(--gap-xl);
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.compare-table th, .compare-table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  font-size: var(--text-small);
}

.compare-table th {
  font-weight: 700;
  font-size: var(--text-body);
  background: rgba(255,255,255,0.02);
}

.compare-table th:last-child,
.compare-table td:last-child {
  background: rgba(255,224,0,0.06);
  font-weight: 700;
}

.compare-table tr:hover td { background: rgba(255,255,255,0.02); }
.compare-table tr:hover td:last-child { background: rgba(255,224,0,0.08); }
.compare-table tr:last-child td { border-bottom: none; }

.compare-table .good { color: var(--color-accent-green); }
.compare-table .bad  { color: #71717A; }
.compare-table .price-yellow { color: var(--color-accent-yellow); font-weight: 700; }

.solution__cta { text-align: center; }

/* ==========================================
   USE CASES
   ========================================== */
#use-cases { background: #111111; }
#use-cases h2 { font-size: var(--text-h2); font-weight: 900; margin-bottom: 1rem; }
#use-cases .lead { font-size: var(--text-body-lg); color: var(--color-text-secondary); margin-bottom: var(--gap-xl); }

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap-md);
  margin-bottom: var(--gap-xl);
}

.use-case-card {
  background: var(--color-bg-card);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.3s ease;
}
.use-case-card:hover { transform: translateY(-4px); }

.use-case-card__image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.use-case-card__image .img-placeholder {
  width: 100%; height: 100%;
  border-radius: 0;
  font-size: 2rem;
}

.use-case-badge {
  position: absolute;
  bottom: 10px; left: 10px;
  padding: 4px 12px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  border-radius: 999px;
  font-size: var(--text-xs);
}

.use-case-card__body { padding: 20px; }
.use-case-card__role { font-size: var(--text-small); color: var(--color-text-muted); margin-bottom: 0.4rem; }
.use-case-card__title { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.use-case-card__text { font-size: var(--text-small); color: var(--color-text-secondary); line-height: 1.6; }

.use-cases__cta { text-align: center; }

/* ==========================================
   MODELS
   ========================================== */
#models { background: var(--color-bg-primary); }
#models h2 { font-size: var(--text-h2); font-weight: 900; margin-bottom: 1rem; }
#models .lead { font-size: var(--text-body-lg); color: var(--color-text-secondary); margin-bottom: var(--gap-xl); }

.models-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-md);
  margin-bottom: var(--gap-md);
}

.model-card {
  border-radius: var(--card-radius-lg);
  padding: 32px 24px;
}

.model-card--banana {
  border: 1px solid rgba(255,224,0,0.2);
  background: rgba(255,224,0,0.03);
}

.model-card--kandinsky {
  border: 1px solid rgba(124,58,237,0.2);
  background: rgba(124,58,237,0.03);
}

.model-card__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 500;
}

.badge--yellow { background: rgba(255,224,0,0.1); color: var(--color-accent-yellow); }
.badge--purple { background: rgba(124,58,237,0.15); color: #A78BFA; }
.badge--green  { background: rgba(34,197,94,0.1); color: var(--color-accent-green); font-weight: 700; }

.model-card__icon { font-size: 4rem; margin-bottom: 1rem; }
.model-card__title { font-size: var(--text-h3); font-weight: 700; margin-bottom: 0.75rem; }
.model-card__slogan { font-style: italic; color: var(--color-text-secondary); margin-bottom: 1rem; line-height: 1.6; }
.model-card__desc { color: var(--color-text-secondary); margin-bottom: 1.25rem; line-height: 1.7; }

.model-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.model-tag {
  padding: 4px 12px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.model-card__image {
  height: 200px;
  border-radius: 12px;
  overflow: hidden;
}
.model-card__image .img-placeholder { width: 100%; height: 100%; border-radius: 12px; }

.models-soon {
  background: rgba(255,255,255,0.03);
  border: 1px dashed rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
}

.models-soon__title { font-size: var(--text-h3); font-weight: 700; margin-bottom: 0.75rem; }
.models-soon__text { color: var(--color-text-secondary); margin-bottom: 1.25rem; }

/* ==========================================
   PRICING
   ========================================== */
#pricing { background: #111111; }
#pricing h2 { font-size: var(--text-h2); font-weight: 900; margin-bottom: 1rem; }
#pricing .lead { font-size: var(--text-body-lg); color: var(--color-text-secondary); margin-bottom: var(--gap-xl); }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
  align-items: start;
  margin-bottom: 2rem;
}

.pricing-card {
  border-radius: 20px;
  padding: 32px 24px;
  position: relative;
}

.pricing-card--free {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
}

.pricing-card--payg {
  background: rgba(255,224,0,0.04);
  border: 2px solid rgba(255,224,0,0.4);
  box-shadow: 0 0 60px rgba(255,224,0,0.08);
}

.pricing-card--packages {
  background: rgba(124,58,237,0.04);
  border: 1px solid rgba(124,58,237,0.2);
}

.pricing-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 700;
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
}

.pricing-badge--hot { background: var(--color-accent-yellow); color: #000; }

.pricing-card__title { font-size: 1.1rem; font-weight: 700; margin-bottom: 1rem; }

.pricing-card__price {
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 900;
  margin-bottom: 1.5rem;
  line-height: 1;
}

.pricing-card__price span {
  font-size: var(--text-small);
  font-weight: 400;
  color: var(--color-text-muted);
  display: block;
  margin-top: 4px;
}

.pricing-list { margin-bottom: 1.5rem; }
.pricing-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 6px 0;
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.pricing-list li:last-child { border-bottom: none; }
.pricing-list .check { color: var(--color-accent-green); flex-shrink: 0; }
.pricing-list .soon { color: var(--color-text-muted); flex-shrink: 0; }
.pricing-list .strong { color: #fff; font-weight: 700; }

.pricing-note {
  font-style: italic;
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.pricing-card .btn { width: 100%; }

.pricing-microcopy {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-small);
}

/* ==========================================
   FAQ
   ========================================== */
#faq { background: var(--color-bg-primary); }
#faq h2 { font-size: var(--text-h2); font-weight: 900; margin-bottom: var(--gap-xl); }

.accordion {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item { border-bottom: 1px solid var(--color-border); }
.accordion-item:last-child { border-bottom: none; }

.accordion-header {
  width: 100%;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--text-body-lg);
  font-weight: 600;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  text-align: left;
  gap: 1rem;
  transition: background 0.2s ease;
}
.accordion-header:hover { background: rgba(255,255,255,0.03); }

.accordion-icon {
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 1;
  flex-shrink: 0;
  transition: transform 0.2s ease;
  color: var(--color-accent-yellow);
}
.accordion-item.open .accordion-icon { transform: rotate(45deg); }

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.accordion-item.open .accordion-body { max-height: 400px; }

.accordion-body__inner {
  padding: 0 24px 20px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: var(--text-body);
}
.accordion-body__inner a { color: var(--color-accent-yellow); text-decoration: underline; }

/* ==========================================
   FINAL CTA
   ========================================== */
#final-cta {
  text-align: center;
  position: relative;
  overflow: hidden;
}

#final-cta .hero__orb--purple { right: -5%; top: 10%; }
#final-cta .hero__orb--yellow { left: -5%; bottom: 10%; }

.final-cta__inner { position: relative; z-index: 1; }
.final-cta__title { font-size: var(--text-h2); font-weight: 900; margin-bottom: 1rem; }
.final-cta__sub { font-size: var(--text-body-lg); color: var(--color-text-secondary); margin-bottom: var(--gap-lg); max-width: 560px; margin-left: auto; margin-right: auto; }
.final-cta__buttons { display: flex; gap: var(--gap-md); justify-content: center; flex-wrap: wrap; margin-bottom: 1rem; }
.final-cta__note { font-size: var(--text-small); color: var(--color-text-muted); }

/* ==========================================
   FOOTER
   ========================================== */
footer {
  background: #0A0A0A;
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__logo {
  font-size: 1.1rem;
  font-weight: 700;
}
.footer__logo span { color: var(--color-accent-yellow); }

.footer__links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer__links a {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  transition: color 0.2s;
}
.footer__links a:hover { color: var(--color-text-secondary); }

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ==========================================
   AOS-like Scroll Animations
   ========================================== */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}
[data-aos][data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos][data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos][data-aos-delay="300"] { transition-delay: 0.3s; }
[data-aos][data-aos-delay="400"] { transition-delay: 0.4s; }
[data-aos][data-aos-delay="500"] { transition-delay: 0.5s; }

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; padding-top: 100px; }
  .hero__images { height: 320px; margin-top: 2rem; }
  .hero__img--main { width: 240px; height: 240px; }
  .hero__img--tl  { width: 160px; height: 160px; }
  .hero__img--bl  { width: 170px; height: 170px; }
  .solution-cards { grid-template-columns: 1fr; }
  .models-grid    { grid-template-columns: 1fr; }
  .pricing-grid   { grid-template-columns: 1fr; }
  .use-cases-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .problem-grid { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
  .final-cta__buttons { flex-direction: column; align-items: center; }
  .nav__logo { font-size: 1rem; }

  /* mobile use-cases horizontal scroll */
  .use-cases-grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 1rem;
    padding-bottom: 1rem;
    -webkit-overflow-scrolling: touch;
  }
  .use-case-card {
    scroll-snap-align: start;
    min-width: 280px;
    flex-shrink: 0;
  }
}