/* ==========================================================================
   AI CPO Landing Page — Standalone styles
   ========================================================================== */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

:root {
  --l-bg: #ffffff;
  --l-bg-2: #f8f9fb;
  --l-bg-3: #f1f3f6;
  --l-bg-card: #ffffff;
  --l-border: rgba(0,0,0,0.08);
  --l-border-2: rgba(0,0,0,0.12);
  --l-text: #1a1a2e;
  --l-text-2: #5a5a72;
  --l-text-3: #8e8ea0;
  --l-accent: #3b6df0;
  --l-accent-2: #2b5cd6;
  --l-accent-dim: rgba(59,109,240,0.06);
  --l-accent-glow: rgba(59,109,240,0.12);
  --l-green: #16a34a;
  --l-green-dim: rgba(22,163,74,0.08);
  --l-amber: #d97706;
  --l-amber-dim: rgba(217,119,6,0.08);
  --l-purple: #7c3aed;
  --l-purple-dim: rgba(124,58,237,0.06);
  --l-font: 'Inter', system-ui, -apple-system, sans-serif;
  --l-max-w: 1120px;
  --l-r: 12px;
  --l-r-lg: 20px;
}

body {
  font-family: var(--l-font);
  background: var(--l-bg);
  color: var(--l-text);
  line-height: 1.6;
  overflow-x: hidden;
  padding-top: 60px;
}

/* --- Sticky Header --- */
.l-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 60px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--l-border);
  transition: background 0.3s;
}
.l-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.l-header__logo {
  font-size: 18px;
  font-weight: 800;
  color: var(--l-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.l-header__nav {
  display: flex;
  gap: 24px;
}
.l-header__nav a {
  font-size: 14px;
  color: var(--l-text-2);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.l-header__nav a:hover { color: var(--l-text); }
.l-header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.l-header__login {
  font-size: 14px;
  color: var(--l-text-2);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.l-header__login:hover { color: var(--l-text); }
.l-header__cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  background: var(--l-accent);
  color: #fff;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.l-header__cta:hover {
  background: var(--l-accent-2);
  transform: translateY(-1px);
}

.container {
  max-width: var(--l-max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Animations --- */
.anim-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.anim-fade[data-anim="slide-up"] { transform: translateY(40px); }
.anim-fade.visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
}
.hero-glow--1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59,109,240,0.12), transparent 70%);
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  animation: glow-pulse 8s ease-in-out infinite;
}
.hero-glow--2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124,58,237,0.08), transparent 70%);
  bottom: -100px;
  right: -100px;
  animation: glow-pulse 10s ease-in-out 2s infinite;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.3; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.5; transform: translateX(-50%) scale(1.1); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--l-accent-dim);
  border: 1px solid rgba(126,180,245,0.15);
  border-radius: 100px;
  padding: 6px 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--l-accent);
  background: var(--l-accent-dim);
  border: 1px solid rgba(59,109,240,0.15);
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}
.hero-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--l-green);
  animation: dot-blink 2s ease-in-out infinite;
}
@keyframes dot-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--l-text);
  margin-bottom: 24px;
  max-width: 800px;
}
.hero-title__accent {
  background: linear-gradient(135deg, var(--l-accent), var(--l-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--l-text-2);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.6;
}

/* --- Hero Form --- */
.hero-form { width: 100%; max-width: 640px; }
.hero-input-wrap {
  display: flex;
  gap: 0;
  background: var(--l-bg-2);
  border: 1px solid var(--l-border-2);
  border-radius: var(--l-r);
  padding: 6px;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.hero-input-wrap:focus-within {
  border-color: rgba(59,109,240,0.3);
  box-shadow: 0 0 0 4px rgba(59,109,240,0.08), 0 20px 40px rgba(0,0,0,0.06);
}
.hero-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--l-font);
  font-size: 16px;
  color: var(--l-text);
  padding: 12px 16px;
  min-width: 0;
}
.hero-input::placeholder { color: var(--l-text-3); }
.hero-input:focus { color: var(--l-text); }

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--l-accent-2), var(--l-accent));
  color: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font-family: var(--l-font);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
}
.hero-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(59,109,240,0.3);
  filter: brightness(1.05);
}
.hero-cta:active { transform: translateY(0); }

/* --- Hero Trust --- */
.hero-trust {
  display: flex;
  gap: 24px;
  margin-top: 32px;
  flex-wrap: wrap;
  justify-content: center;
}
.hero-trust__item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--l-text-2);
}

/* --- Hero Scroll Hint --- */
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--l-text-3);
  animation: scroll-bounce 2s ease-in-out infinite;
}
@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Sections --- */
.section {
  padding: 100px 0;
  position: relative;
}
.section--dark {
  background: var(--l-bg-2);
}
.section--cta {
  padding: 120px 0;
  background: linear-gradient(180deg, var(--l-bg) 0%, var(--l-bg-2) 100%);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--l-accent);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--l-text);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.section-sub {
  font-size: 17px;
  color: var(--l-text-2);
  max-width: 520px;
  margin: 0 auto;
}

/* --- Cards Grid (What you get) --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--l-bg-card);
  border: 1px solid var(--l-border);
  border-radius: var(--l-r-lg);
  padding: 32px;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
.card:hover {
  border-color: var(--l-border-2);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.card-icon--blue { background: var(--l-accent-dim); color: var(--l-accent); }
.card-icon--green { background: var(--l-green-dim); color: var(--l-green); }
.card-icon--purple { background: var(--l-purple-dim); color: var(--l-purple); }

.card-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--l-text);
  margin-bottom: 8px;
}
.card-desc {
  font-size: 14px;
  color: var(--l-text-2);
  line-height: 1.6;
  margin-bottom: 20px;
}

.card-preview {
  background: var(--l-bg-2);
  border: 1px solid var(--l-border);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.card-preview__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}
.card-preview__label { color: var(--l-text-3); }
.card-preview__value { color: var(--l-text); font-weight: 500; }
.card-preview__value--ok { color: var(--l-green); }
.card-preview__value--warn { color: var(--l-amber); }

/* --- Steps (How it works) --- */
.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
}

.step {
  flex: 0 0 280px;
  text-align: center;
  padding: 0 16px;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--l-accent-dim);
  border: 1px solid rgba(126,180,245,0.2);
  color: var(--l-accent);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.step-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--l-bg-card);
  border: 1px solid var(--l-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--l-accent);
}

.step-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--l-text);
  margin-bottom: 8px;
}
.step-desc {
  font-size: 14px;
  color: var(--l-text-2);
  line-height: 1.6;
}

.step-arrow {
  flex: 0 0 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--l-text-3);
  margin-top: 72px;
}

/* --- Modes Grid --- */
.modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mode-card {
  background: var(--l-bg-card);
  border: 1px solid var(--l-border);
  border-radius: var(--l-r-lg);
  padding: 32px;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
.mode-card:hover {
  border-color: var(--l-border-2);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}

.mode-card__icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.mode-card__icon--blue { background: var(--l-accent-dim); color: var(--l-accent); }
.mode-card__icon--green { background: var(--l-green-dim); color: var(--l-green); }
.mode-card__icon--amber { background: var(--l-amber-dim); color: var(--l-amber); }

.mode-card__label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--l-text-3);
  margin-bottom: 4px;
}

.mode-card__title {
  font-size: 20px;
  font-weight: 600;
  color: var(--l-text);
  margin-bottom: 10px;
}

.mode-card__desc {
  font-size: 14px;
  color: var(--l-text-2);
  line-height: 1.6;
  margin-bottom: 20px;
}

.mode-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mode-card__list li {
  font-size: 13px;
  color: var(--l-text-2);
  padding-left: 20px;
  position: relative;
}
.mode-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--l-accent-dim);
  border: 1px solid rgba(126,180,245,0.3);
}

/* --- Proof / Stats --- */
.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
  margin-bottom: 64px;
}

.proof-stat__number {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 800;
  color: var(--l-text);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}
.proof-stat__label {
  font-size: 14px;
  color: var(--l-text-2);
  line-height: 1.4;
}

.powered-by {
  text-align: center;
}
.powered-by__label {
  display: block;
  font-size: 12px;
  color: var(--l-text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.powered-by__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.powered-by__logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--l-text-2);
  letter-spacing: 0.02em;
}
.powered-by__sep {
  color: var(--l-text-3);
}

/* --- Hero Cases (3 use cases) --- */
.hero-cases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 780px;
  margin-bottom: 40px;
}
.hero-case {
  display: flex;
  gap: 12px;
  background: var(--l-bg-card);
  border: 1px solid var(--l-border);
  border-radius: var(--l-r);
  padding: 20px;
  text-align: left;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.hero-case:hover {
  border-color: var(--l-border-2);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.hero-case__num {
  font-size: 12px;
  font-weight: 700;
  color: var(--l-accent);
  flex-shrink: 0;
  margin-top: 2px;
}
.hero-case__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--l-text);
  margin-bottom: 4px;
}
.hero-case__desc {
  font-size: 13px;
  color: var(--l-text-2);
  line-height: 1.5;
  margin-bottom: 8px;
}
.hero-case__tags {
  font-size: 11px;
  color: var(--l-text-3);
  letter-spacing: 0.01em;
}

/* --- Example Analysis Cards --- */
.example-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.example-card {
  background: var(--l-bg-card);
  border: 1px solid var(--l-border);
  border-radius: var(--l-r-lg);
  padding: 28px;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
.example-card:hover {
  border-color: var(--l-border-2);
  box-shadow: 0 12px 40px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}
.example-card__header {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.example-card__tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 100px;
}
.example-card__tag--red { background: rgba(239,68,68,0.08); color: #dc2626; }
.example-card__tag--blue { background: var(--l-accent-dim); color: var(--l-accent); }
.example-card__tag--green { background: var(--l-green-dim); color: var(--l-green); }
.example-card__tag--purple { background: var(--l-purple-dim); color: var(--l-purple); }
.example-card__tag--muted { background: rgba(0,0,0,0.04); color: var(--l-text-3); }

.example-card__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--l-text);
  margin-bottom: 4px;
}
.example-card__desc {
  font-size: 13px;
  color: var(--l-text-2);
  margin-bottom: 16px;
  line-height: 1.5;
}
.example-card__data {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.example-card__row {
  display: flex;
  gap: 10px;
  font-size: 13px;
  color: var(--l-text-2);
  line-height: 1.4;
}
.example-card__risk {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 20px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  background: rgba(239,68,68,0.08);
  color: #dc2626;
}
.example-card__kv {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 1px solid var(--l-border);
}
.example-card__kv:last-child { border-bottom: none; }
.example-card__k { color: var(--l-text-3); }
.example-card__v { color: var(--l-text); font-weight: 500; }
.example-card__v--accent { color: var(--l-accent); font-weight: 600; }

.example-card__more {
  margin-top: 14px;
  font-size: 13px;
  color: var(--l-accent);
  font-weight: 500;
  cursor: pointer;
}
.example-card__more:hover { text-decoration: underline; }

.example-also {
  text-align: center;
  font-size: 14px;
  color: var(--l-text-3);
  margin-top: 32px;
}

/* --- Section Alt (light gray) --- */
.section--alt {
  background: var(--l-bg-2);
}
.section--cta {
  padding: 120px 0;
  background: var(--l-bg-2);
}

/* --- Final CTA --- */
.cta-block {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.cta-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--l-text);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.cta-sub {
  font-size: 17px;
  color: var(--l-text-2);
  margin-bottom: 32px;
}
.cta-form { margin-bottom: 16px; }
.cta-note {
  font-size: 13px;
  color: var(--l-text-3);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--l-border);
  padding: 32px 0;
  background: var(--l-bg);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}
.footer-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--l-text);
  letter-spacing: -0.02em;
}
.footer-copy {
  font-size: 13px;
  color: var(--l-text-3);
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-size: 13px;
  color: var(--l-text-3);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--l-text); }

/* --- Responsive --- */
@media (max-width: 900px) {
  .l-header__nav { display: none; }
  .l-header__login { display: none; }
  .hero-cases { grid-template-columns: 1fr; max-width: 400px; }
  .example-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .cards-grid, .modes-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .steps { flex-direction: column; align-items: center; gap: 24px; }
  .step { flex: none; max-width: 320px; }
  .step-arrow {
    transform: rotate(90deg);
    margin-top: 0;
  }
  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero-input-wrap { flex-direction: column; }
  .hero-cta { justify-content: center; }
  .hero-trust { flex-direction: column; align-items: center; gap: 12px; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
  .footer-links { justify-content: center; }
  .section { padding: 64px 0; }
  .section--cta { padding: 80px 0; }
  .hero-scroll-hint { display: none; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .hero-cta { padding: 12px 20px; font-size: 14px; }
  .card { padding: 24px; }
  .mode-card { padding: 24px; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .proof-stat__number { font-size: 32px; }
}

.hide-mobile { display: inline; }
@media (max-width: 640px) {
  .hide-mobile { display: none; }
}