/* ============================================================
   SalesTalk.ai — Design System
   Tech/AI brand: deep navy + black surfaces, turquoise accent
   ============================================================ */

:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* Spacing */
  --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;

  /* Radius */
  --radius-sm: 0.5rem; --radius-md: 0.75rem; --radius-lg: 1rem;
  --radius-xl: 1.5rem; --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 680px;
  --content-default: 1000px;
  --content-wide: 1240px;

  --font-display: 'Cabinet Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Satoshi', 'Segoe UI', sans-serif;
}

/* LIGHT MODE */
:root, [data-theme="light"] {
  --color-bg: #f6f8fa;
  --color-surface: #ffffff;
  --color-surface-2: #eef2f5;
  --color-surface-offset: #e6ecf0;
  --color-border: #d6dee4;
  --color-divider: #e3e9ee;

  --color-text: #0d1b26;
  --color-text-muted: #4d5d68;
  --color-text-faint: #8595a0;
  --color-text-inverse: #f6f8fa;

  --color-primary: #0a8a92;        /* turquoise (accessible on light) */
  --color-primary-hover: #086e75;
  --color-primary-bright: #19c3cf; /* brand cyan glow */
  --color-navy: #0a2540;
  --color-navy-2: #0d2e4f;

  --color-on-dark: #eaf6f8;

  --shadow-sm: 0 1px 3px rgba(10,37,64,0.08);
  --shadow-md: 0 6px 24px rgba(10,37,64,0.10);
  --shadow-lg: 0 20px 50px rgba(10,37,64,0.16);
  --shadow-glow: 0 0 40px rgba(25,195,207,0.25);

  --hero-bg: radial-gradient(120% 120% at 70% 20%, #0d3a5c 0%, #0a2540 45%, #061626 100%);
}

/* DARK MODE */
[data-theme="dark"] {
  --color-bg: #061626;
  --color-surface: #0c2236;
  --color-surface-2: #102b44;
  --color-surface-offset: #143350;
  --color-border: #1d425f;
  --color-divider: #163047;

  --color-text: #e7f1f6;
  --color-text-muted: #9db4c2;
  --color-text-faint: #647d8d;
  --color-text-inverse: #061626;

  --color-primary: #2fd0db;
  --color-primary-hover: #56e0e9;
  --color-primary-bright: #2fd0db;
  --color-navy: #0a2540;
  --color-navy-2: #0d2e4f;

  --color-on-dark: #eaf6f8;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.45);
  --shadow-lg: 0 20px 50px rgba(0,0,0,0.55);
  --shadow-glow: 0 0 50px rgba(47,208,219,0.3);

  --hero-bg: radial-gradient(120% 120% at 70% 20%, #0e3b5d 0%, #082137 45%, #040f1c 100%);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #061626;
    --color-surface: #0c2236;
    --color-surface-2: #102b44;
    --color-surface-offset: #143350;
    --color-border: #1d425f;
    --color-divider: #163047;
    --color-text: #e7f1f6;
    --color-text-muted: #9db4c2;
    --color-text-faint: #647d8d;
    --color-text-inverse: #061626;
    --color-primary: #2fd0db;
    --color-primary-hover: #56e0e9;
    --color-primary-bright: #2fd0db;
    --color-on-dark: #eaf6f8;
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

img, picture, video, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4 { text-wrap: balance; line-height: 1.1; font-family: var(--font-display); font-weight: 700; }
p { text-wrap: pretty; }

a { color: inherit; text-decoration: none; }

::selection { background: rgba(47,208,219,0.3); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

button { cursor: pointer; background: none; border: none; }

a, button, [role="button"], input, textarea, select {
  transition: color var(--transition-interactive), background var(--transition-interactive),
    border-color var(--transition-interactive), box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important; scroll-behavior: auto !important;
  }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ============================================================
   Layout helpers
   ============================================================ */
.container { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.container--narrow { max-width: var(--content-narrow); }
.container--default { max-width: var(--content-default); }

.section { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); }
.section--tight { padding-block: clamp(var(--space-12), 6vw, var(--space-20)); }

.eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--color-primary);
}
.eyebrow::before { content: ""; width: 1.5rem; height: 1px; background: var(--color-primary); }

.section-title { font-size: var(--text-2xl); letter-spacing: -0.02em; }
.section-lead { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 60ch; margin-top: var(--space-4); }

.text-gradient {
  background: linear-gradient(100deg, var(--color-primary-bright), #7af0e3);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 600; padding: 0.85em 1.6em;
  border-radius: var(--radius-full); white-space: nowrap;
}
.btn--primary {
  background: linear-gradient(120deg, var(--color-primary), var(--color-primary-bright));
  color: #04222b; box-shadow: var(--shadow-glow);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 0 60px rgba(47,208,219,0.5); }
.btn--ghost { border: 1px solid var(--color-border); color: var(--color-text); background: var(--color-surface); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }
.btn--on-dark { border: 1px solid rgba(234,246,248,0.25); color: var(--color-on-dark); background: rgba(255,255,255,0.04); }
.btn--on-dark:hover { border-color: var(--color-primary-bright); color: var(--color-primary-bright); }
.btn--lg { font-size: var(--text-base); padding: 1em 2em; }

/* ============================================================
   Header
   ============================================================ */
.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.header--scrolled { border-bottom-color: var(--color-divider); box-shadow: var(--shadow-sm); }
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); height: 4.5rem; }
.logo { display: inline-flex; align-items: center; gap: 0; color: var(--color-text); }
.brand-logo-shell {
  position: relative;
  display: block;
  width: 8.8rem;
  height: 4.675rem;
  filter: drop-shadow(0 6px 16px rgba(10,37,64,0.1));
}
.brand-logo {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}
.brand-logo--dark { opacity: 0; }
[data-theme="dark"] .brand-logo-shell {
  filter: drop-shadow(0 0 20px rgba(47,208,219,0.18));
}
[data-theme="dark"] .brand-logo--light { opacity: 0; }
[data-theme="dark"] .brand-logo--dark { opacity: 1; }
.brand-logo__text {
  position: absolute;
  left: 1.3rem;
  top: 50%;
  transform: translateY(-56%);
  display: none;
  align-items: baseline;
  white-space: nowrap;
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
}
.brand-logo__sales { color: var(--color-text); }
.brand-logo__talk { color: var(--color-primary); }
[data-theme="dark"] .brand-logo__sales { color: #ffffff; }
[data-theme="dark"] .brand-logo__talk { color: var(--color-primary); }
.footer__logo .brand-logo-shell {
  width: 8.8rem;
  height: 4.675rem;
  display: block;
  filter: drop-shadow(0 0 20px rgba(47,208,219,0.16));
}
.footer .brand-logo--light { opacity: 0; }
.footer .brand-logo--dark { opacity: 1; }
.footer .brand-logo__sales { color: #ffffff; }
.footer .brand-logo__talk { color: var(--color-primary-bright); }

.nav { display: flex; align-items: center; gap: var(--space-8); }
.nav__links { display: flex; align-items: center; gap: var(--space-6); list-style: none; }
.nav__links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding-block: 0.35rem;
}
.nav__links a:hover { color: var(--color-text); }
.nav__links a[aria-current="page"] {
  color: var(--color-text);
  font-weight: 700;
}
.nav__links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.25rem;
  height: 3px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-bright));
}
.nav__actions { display: flex; align-items: center; gap: var(--space-3); }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.4rem; height: 2.4rem; border-radius: var(--radius-full);
  border: 1px solid var(--color-border); color: var(--color-text-muted); background: var(--color-surface);
}
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }

.nav-toggle { display: none; width: 2.6rem; height: 2.6rem; align-items: center; justify-content: center; color: var(--color-text); }

@media (max-width: 880px) {
  .nav__links { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav__links--open {
    display: flex; flex-direction: column; position: absolute; top: 4.5rem; left: 0; right: 0;
    background: var(--color-surface); border-bottom: 1px solid var(--color-divider);
    padding: var(--space-6); gap: var(--space-5); align-items: flex-start;
  }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative; background: var(--hero-bg); color: var(--color-on-dark);
  overflow: hidden; padding-block: clamp(var(--space-20), 10vw, var(--space-32));
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(60% 50% at 80% 30%, rgba(47,208,219,0.14), transparent 70%);
}
.hero__grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: var(--space-12); align-items: center; position: relative; z-index: 1; }
.hero h1 { font-size: var(--text-3xl); letter-spacing: -0.03em; color: #fff; }
.hero__lead { font-size: var(--text-lg); color: #b9d4dd; margin-top: var(--space-6); max-width: 44ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-8); }
.hero__pill {
  display: inline-flex; align-items: center; gap: var(--space-2); font-size: var(--text-xs);
  font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-primary-bright);
  border: 1px solid rgba(47,208,219,0.3); border-radius: var(--radius-full);
  padding: 0.4em 0.9em; margin-bottom: var(--space-6); background: rgba(47,208,219,0.06);
}
.hero__media { position: relative; }
.hero__media img { border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); border: 1px solid rgba(47,208,219,0.18); }
.hero__stats { display: flex; gap: var(--space-8); margin-top: var(--space-12); flex-wrap: wrap; }
.hero__stat strong { display: block; font-family: var(--font-display); font-size: var(--text-xl); color: #fff; }
.hero__stat span { font-size: var(--text-xs); color: #8fb0bc; text-transform: uppercase; letter-spacing: 0.08em; }

@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__media { order: -1; }
}

/* ============================================================
   Logos / trust strip
   ============================================================ */
.trust { border-block: 1px solid var(--color-divider); background: var(--color-surface); }
.trust__inner { display: flex; align-items: center; justify-content: center; gap: var(--space-10); flex-wrap: wrap; padding-block: var(--space-8); }
.trust__label { font-size: var(--text-xs); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.1em; }
.trust__tag { font-family: var(--font-display); font-weight: 600; color: var(--color-text-muted); font-size: var(--text-lg); }

/* ============================================================
   Feature blocks
   ============================================================ */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: center; }
.split--reverse .split__media { order: 2; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } .split--reverse .split__media { order: 0; } }

.split__media img { border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); border: 1px solid var(--color-border); }

/* Built for relationship-driven professionals */
.relationship { background: var(--color-surface); border-block: 1px solid var(--color-divider); }
.relationship__body { margin-top: var(--space-5); color: var(--color-text-muted); }
.relationship__body b { color: var(--color-text); }
.relationship .hl { display: inline-block; font-weight: 800; color: var(--color-primary); background: linear-gradient(180deg, transparent 60%, rgba(47,208,219,0.22) 60%); padding: 0 0.15em; }
.relationship__tagline { margin-top: var(--space-5); font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 500; max-width: 48ch; }
.relationship__cta-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-20));
  margin-top: var(--space-6);
}
.relationship__cta-cell { margin-top: 0; }
.relationship__cta-cell--image { justify-content: center; }
@media (max-width: 860px) {
  .relationship__cta-row { grid-template-columns: 1fr; }
  .relationship__cta-cell { justify-content: center; }
}

.feature-list { list-style: none; margin-top: var(--space-6); display: grid; gap: var(--space-4); }
.feature-list li { display: flex; gap: var(--space-3); align-items: flex-start; }
.feature-list svg { flex-shrink: 0; color: var(--color-primary); margin-top: 0.15em; }
.feature-list b { color: var(--color-text); }
.feature-list span { color: var(--color-text-muted); }

/* ============================================================
   Cards grid
   ============================================================ */
.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-6); margin-top: var(--space-12); }
.card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-8);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.card__icon {
  width: 3rem; height: 3rem; border-radius: var(--radius-md); display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(47,208,219,0.16), rgba(10,138,146,0.16));
  color: var(--color-primary); margin-bottom: var(--space-5);
}
.card h3 { font-size: var(--text-lg); margin-bottom: var(--space-3); }
.card p { color: var(--color-text-muted); font-size: var(--text-base); }

/* ============================================================
   Testimonials
   ============================================================ */
.testimonials { background: var(--color-surface); border-block: 1px solid var(--color-divider); }
.testi-grid { columns: 3 280px; column-gap: var(--space-6); margin-top: var(--space-12); }
.testi {
  break-inside: avoid; margin-bottom: var(--space-6); padding: var(--space-6);
  border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-bg);
}
.testi p { font-size: var(--text-base); color: var(--color-text); }
.testi__quote { color: var(--color-primary); font-family: var(--font-display); font-size: var(--text-2xl); line-height: 0.5; }
.testi__author { margin-top: var(--space-4); display: flex; align-items: center; gap: var(--space-3); }
.testi__avatar { width: 2.6rem; height: 2.6rem; border-radius: var(--radius-full); display: grid; place-items: center; background: var(--color-navy); color: #fff; font-family: var(--font-display); font-weight: 700; font-size: var(--text-sm); }
.testi__name { font-weight: 600; font-size: var(--text-sm); }
.testi__role { font-size: var(--text-xs); color: var(--color-text-faint); }

/* ============================================================
   CTA band
   ============================================================ */
.cta-band { background: var(--hero-bg); color: #fff; text-align: center; border-radius: var(--radius-xl); padding: clamp(var(--space-12), 8vw, var(--space-24)); position: relative; overflow: hidden; }
.cta-band::after { content: ""; position: absolute; inset: 0; background: radial-gradient(50% 60% at 50% 0%, rgba(47,208,219,0.2), transparent 70%); pointer-events: none; }
.cta-band h2 { font-size: var(--text-2xl); position: relative; z-index: 1; }
.cta-band p { color: #b9d4dd; margin-top: var(--space-4); position: relative; z-index: 1; max-width: 50ch; margin-inline: auto; }
.cta-band .hero__cta { justify-content: center; position: relative; z-index: 1; }
.cta-band__contact { position: relative; z-index: 1; margin-top: var(--space-6); display: flex; align-items: center; justify-content: center; gap: var(--space-3); flex-wrap: wrap; font-weight: 700; font-size: var(--text-sm); }
.cta-band__contact a { color: var(--color-primary-bright); text-decoration: none; }
.cta-band__contact a:hover { text-decoration: underline; }
.cta-band__contact span { color: rgba(255,255,255,0.4); }

/* ============================================================
   Pricing
   ============================================================ */
.price-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-6); margin-top: var(--space-12); align-items: stretch; }
.price-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: var(--space-8); display: flex; flex-direction: column;
}
.price-card--featured { border-color: var(--color-primary); box-shadow: var(--shadow-glow); position: relative; }
.price-card--featured::before {
  content: "Most popular"; position: absolute; top: -0.8rem; left: 50%; transform: translateX(-50%);
  background: linear-gradient(120deg, var(--color-primary), var(--color-primary-bright)); color: #04222b;
  font-size: var(--text-xs); font-weight: 700; padding: 0.3em 1em; border-radius: var(--radius-full); white-space: nowrap;
}
.price-card h3 { font-size: var(--text-lg); }
.price-card__price { font-family: var(--font-display); font-size: var(--text-2xl); margin-block: var(--space-3); }
.price-card__price small { font-size: var(--text-sm); color: var(--color-text-faint); font-weight: 500; }
.price-card__desc { color: var(--color-text-muted); font-size: var(--text-sm); min-height: 2.6em; }
.price-card ul { list-style: none; display: grid; gap: var(--space-3); margin-block: var(--space-6); flex: 1; }
.price-card li { display: flex; gap: var(--space-3); align-items: flex-start; font-size: var(--text-sm); color: var(--color-text-muted); }
.price-card li svg { color: var(--color-primary); flex-shrink: 0; margin-top: 0.15em; }

/* ============================================================
   FAQ
   ============================================================ */
.faq { display: grid; gap: var(--space-3); margin-top: var(--space-10); max-width: var(--content-narrow); margin-inline: auto; }
.faq details { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); padding: var(--space-5) var(--space-6); }
.faq summary { font-family: var(--font-display); font-weight: 600; font-size: var(--text-base); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--color-primary); font-size: var(--text-lg); }
.faq details[open] summary::after { content: "−"; }
.faq p { color: var(--color-text-muted); margin-top: var(--space-4); font-size: var(--text-base); }

/* ============================================================
   Footer
   ============================================================ */
.footer { background: var(--color-navy); color: #c7dde6; padding-block: var(--space-16) var(--space-8); }
[data-theme="dark"] .footer { background: #040f1c; }
.footer__grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--space-8); }
.footer__brand p { color: #8fb0bc; margin-top: var(--space-4); font-size: var(--text-sm); max-width: 32ch; }
.footer h4 { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; color: #6f93a1; margin-bottom: var(--space-4); }
.footer ul { list-style: none; display: grid; gap: var(--space-3); }
.footer a { color: #c7dde6; font-size: var(--text-sm); }
.footer a:hover { color: var(--color-primary-bright); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: var(--space-12); padding-top: var(--space-6); display: flex; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; font-size: var(--text-xs); color: #6f93a1; }
@media (max-width: 760px) { .footer__grid { grid-template-columns: 1fr 1fr; } }

/* ============================================================
   Reveal animation
   Content stays visible immediately to avoid page-to-page flashing.
   ============================================================ */
.reveal,
.js .reveal,
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}