/* =========================================================
   DENTE AI — Design Tokens
   Intentional single dark theme: the brief calls for a
   dark, high-contrast, one-accent identity — the same
   choice premium AI-native product sites (Linear, Vercel,
   Retool) make. No light-mode toggle by design.
   ========================================================= */

:root {
  /* ---- Type scale (fluid clamp) ---- */
  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.83rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.03rem + 0.5vw, 1.375rem);
  --text-xl: clamp(1.375rem, 1.18rem + 1vw, 1.875rem);
  --text-2xl: clamp(1.875rem, 1.3rem + 2.4vw, 3.25rem);
  --text-3xl: clamp(2.25rem, 1.1rem + 4vw, 4.5rem);
  --text-hero: clamp(2.75rem, 0.9rem + 6.4vw, 6.75rem);

  /* ---- 4px spacing system ---- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* ---- Surfaces (near-black, warm-neutral undertone) ---- */
  --color-bg: #0a0a0b;
  --color-surface: #111113;
  --color-surface-2: #16161a;
  --color-surface-offset: #1b1b20;
  --color-surface-offset-2: #212127;
  --color-surface-dynamic: #26262d;
  --color-divider: rgba(255, 255, 255, 0.07);
  --color-border: rgba(255, 255, 255, 0.11);

  /* ---- Text ---- */
  --color-text: #f4f3ef;
  --color-text-muted: #a4a3a0;
  --color-text-faint: #6b6a68;
  --color-text-inverse: #0a0a0b;

  /* ---- Accent: Ember (Dente's one color) ---- */
  --color-primary: #ff5a2a;
  --color-primary-hover: #ff7443;
  --color-primary-active: #e0491d;
  --color-primary-highlight: rgba(255, 90, 42, 0.14);
  --color-primary-dim: rgba(255, 90, 42, 0.5);

  /* ---- Status (used sparingly, proof numbers only) ---- */
  --color-success: #6bbf7a;

  /* ---- Radius — sharper, more decisive than default ---- */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* ---- Motion ---- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* ---- Shadows (tone-matched to near-black surfaces) ---- */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 0 1px rgba(255, 90, 42, 0.4), 0 8px 28px rgba(255, 90, 42, 0.18);

  /* ---- Content widths ---- */
  --content-narrow: 640px;
  --content-default: 1040px;
  --content-wide: 1280px;
  --content-full: 100%;

  /* ---- Fonts ---- */
  --font-display: 'Cabinet Grotesk', 'General Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'General Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', monospace;
}

/* =========================================================
   Layout primitives
   ========================================================= */

.wrap {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
}

.wrap--narrow {
  max-width: var(--content-default);
}

.wrap--prose {
  max-width: 720px;
}

section {
  position: relative;
}

.section-pad {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}

.section-pad--tight {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
}

.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h2 {
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-top: var(--space-4);
}

h3 {
  font-size: var(--text-lg);
  font-weight: 600;
}

p {
  color: var(--color-text-muted);
}

.section-head {
  max-width: 46rem;
  margin-bottom: clamp(var(--space-10), 6vw, var(--space-16));
}

.section-head p {
  margin-top: var(--space-4);
  font-size: var(--text-lg);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.hairline {
  height: 1px;
  background: var(--color-divider);
  border: none;
}

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  line-height: 1;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  min-height: 44px;
  white-space: nowrap;
  text-decoration: none;
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--color-primary);
  color: #140904;
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-text-faint);
  background: var(--color-surface-offset);
}

.btn-secondary svg {
  transition: transform var(--transition-interactive);
}

.btn-secondary:hover svg {
  transform: translateX(2px);
}

.btn-block {
  width: 100%;
}

/* =========================================================
   Header / Nav
   ========================================================= */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 11, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.brand__mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  letter-spacing: -0.01em;
}

.nav {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

.nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
}

.nav a:hover {
  color: var(--color-text);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

@media (min-width: 900px) {
  .nav {
    display: flex;
  }
}

/* =========================================================
   Hero
   ========================================================= */

.hero {
  padding-top: clamp(var(--space-16), 12vw, var(--space-32));
  padding-bottom: clamp(var(--space-12), 8vw, var(--space-20));
  overflow: hidden;
}

.hero__grid-lines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to bottom, transparent 0%, var(--color-bg) 92%),
    repeating-linear-gradient(to right, var(--color-divider) 0 1px, transparent 1px 8.333%);
  pointer-events: none;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 880px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.hero__badge .dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}

.hero h1 {
  font-size: var(--text-hero);
  font-weight: 700;
  line-height: 1.03;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__sub {
  margin-top: var(--space-6);
  max-width: 640px;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-10);
}

.hero__trust {
  margin-top: var(--space-8);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.hero__trust strong {
  color: var(--color-text-muted);
  font-weight: 500;
}

/* =========================================================
   Flow diagram (inbound lead -> Dente -> qualified -> closes)
   ========================================================= */

.flow {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.flow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  position: relative;
}

.flow__step {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6) var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}

.flow__step:last-child {
  border-bottom: none;
}

.flow__index {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  flex-shrink: 0;
  width: 2ch;
  padding-top: 0.2em;
}

.flow__body h3 {
  font-size: var(--text-base);
  color: var(--color-text);
}

.flow__body p {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  max-width: 42ch;
}

.flow__arrow {
  display: none;
}

@media (min-width: 900px) {
  .flow__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
  .flow__step {
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-8) var(--space-6);
    border-bottom: none;
    border-right: 1px solid var(--color-divider);
    position: relative;
  }
  .flow__step:last-child {
    border-right: none;
  }
  .flow__index {
    width: auto;
  }
  .flow__step:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -1px;
    top: 50%;
    transform: translate(50%, -50%);
    width: 22px;
    height: 22px;
    background: var(--color-surface);
    border: 1px solid var(--color-divider);
    border-radius: var(--radius-full);
    z-index: 2;
  }
  .flow__step:not(:last-child) .flow__arrow {
    display: block;
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translate(50%, -50%);
    z-index: 3;
    color: var(--color-primary);
    width: 10px;
    height: 10px;
  }
}

/* =========================================================
   Problem section
   ========================================================= */

.problem__statement {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.3;
  border-left: none;
  padding: var(--space-8) 0;
  margin-block: clamp(var(--space-10), 6vw, var(--space-16));
  max-width: 44rem;
}

.problem__statement span {
  color: var(--color-primary);
}

.problem-layout {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .problem-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: var(--space-16);
    align-items: start;
  }
}

.problem-layout .section-head {
  margin-bottom: 0;
}

/* =========================================================
   Product / channels section
   ========================================================= */

.channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-10);
}

@media (min-width: 700px) {
  .channels {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .channels {
    grid-template-columns: repeat(5, 1fr);
  }
}

.channel-card {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  background: var(--color-surface);
  transition:
    border-color var(--transition-interactive),
    transform var(--transition-interactive);
}

.channel-card:hover {
  border-color: var(--color-text-faint);
  transform: translateY(-2px);
}

.channel-card__label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
}

.channel-card p {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
}

.no-ui {
  margin-top: var(--space-10);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.no-ui svg {
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.no-ui p {
  font-size: var(--text-sm);
}

.no-ui strong {
  color: var(--color-text);
}

/* =========================================================
   Differentiation — comparison table
   ========================================================= */

.compare {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: clamp(var(--space-10), 6vw, var(--space-16));
}

.compare__row {
  display: grid;
  grid-template-columns: 1fr;
  border-bottom: 1px solid var(--color-divider);
}

.compare__row:last-child {
  border-bottom: none;
}

@media (min-width: 800px) {
  .compare__row {
    grid-template-columns: 1fr 1fr;
  }
}

.compare__cell {
  padding: var(--space-6) var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-base);
}

.compare__cell--old {
  color: var(--color-text-faint);
  border-bottom: 1px solid var(--color-divider);
}

.compare__cell--new {
  color: var(--color-text);
  background: var(--color-surface);
}

@media (min-width: 800px) {
  .compare__cell--old {
    border-bottom: none;
    border-right: 1px solid var(--color-divider);
  }
}

.compare__cell svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
}

.compare__cell--old svg {
  color: var(--color-text-faint);
}

.compare__cell--new svg {
  color: var(--color-primary);
}

.compare__head {
  display: grid;
  grid-template-columns: 1fr;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

@media (min-width: 800px) {
  .compare__head {
    grid-template-columns: 1fr 1fr;
  }
}

.compare__head span {
  padding: var(--space-4) var(--space-8);
}

.compare__head span:last-child {
  color: var(--color-primary);
}

/* =========================================================
   Proof section
   ========================================================= */

.proof {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.proof__note {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  max-width: 52rem;
  margin-top: var(--space-6);
}

.stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-top: clamp(var(--space-10), 6vw, var(--space-16));
}

@media (min-width: 800px) {
  .stats {
    grid-template-columns: 1.3fr 1fr 1fr;
    align-items: end;
  }
}

.stat {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-6);
}

.stat--lead {
  padding-top: 0;
  border-top: none;
}

.stat__value {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  font-size: var(--text-3xl);
}

.stat--lead .stat__value {
  font-size: var(--text-hero);
  color: var(--color-primary);
}

.stat__label {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 26ch;
}

/* =========================================================
   FAQ
   ========================================================= */

.faq-list {
  margin-top: clamp(var(--space-8), 5vw, var(--space-12));
  border-top: 1px solid var(--color-divider);
}

.faq-item {
  border-bottom: 1px solid var(--color-divider);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6) 0;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary .plus {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-text-faint);
  transition: transform var(--transition-interactive);
}

.faq-item[open] summary .plus {
  transform: rotate(45deg);
  color: var(--color-primary);
}

.faq-item p {
  padding-bottom: var(--space-6);
  font-size: var(--text-base);
  max-width: 62ch;
}

/* =========================================================
   Final CTA / waitlist form
   ========================================================= */

.cta-final {
  border-top: 1px solid var(--color-divider);
}

.cta-final__inner {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  background: linear-gradient(160deg, var(--color-surface) 0%, var(--color-surface-offset) 100%);
  padding: clamp(var(--space-10), 8vw, var(--space-20));
  text-align: center;
}

.cta-final h2 {
  font-size: var(--text-2xl);
  max-width: 30ch;
  margin-inline: auto;
}

.cta-final p {
  margin-top: var(--space-4);
  font-size: var(--text-lg);
  max-width: 42ch;
  margin-inline: auto;
}

.waitlist-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 460px;
  margin: var(--space-8) auto 0;
}

@media (min-width: 560px) {
  .waitlist-form {
    flex-direction: row;
  }
}

.waitlist-form label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.waitlist-form input {
  flex: 1;
  min-height: 44px;
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: var(--text-sm);
  text-align: left;
}

.waitlist-form input::placeholder {
  color: var(--color-text-faint);
}

.waitlist-form input:focus-visible {
  border-color: var(--color-primary);
}

.waitlist-form input:invalid:not(:placeholder-shown) {
  border-color: var(--color-primary-dim);
}

.form-note {
  margin-top: var(--space-5);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.form-success {
  display: none;
  margin: var(--space-8) auto 0;
  max-width: 460px;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-primary-dim);
  background: var(--color-primary-highlight);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--text-sm);
}

.form-success.is-visible {
  display: flex;
}

.form-success svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.waitlist-form.is-hidden {
  display: none;
}

/* =========================================================
   Footer
   ========================================================= */

.footer {
  padding-block: var(--space-16);
}

.footer__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--color-divider);
}

@media (min-width: 800px) {
  .footer__top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer__tagline {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  max-width: 32ch;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer__links a:hover {
  color: var(--color-text);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-8);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (min-width: 800px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* =========================================================
   Reveal-on-scroll (opacity/clip-path only — no CLS)
   ========================================================= */

.reveal {
  opacity: 1;
}

@supports (animation-timeline: view()) {
  .reveal {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }
}

@keyframes reveal-fade {
  to {
    opacity: 1;
  }
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #140904;
  padding: var(--space-3) var(--space-5);
  z-index: 100;
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
}

.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}