/* Art direction: AI SaaS company → technical, precise, trustworthy
   Palette: Dark/cool with a teal accent — geometric, modern
   Typography: Satoshi (body) + General Sans (display) — clean, modern, Fontshare
   Density: spacious — premium feel */

: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;

  /* Font families */
  --font-display: 'General Sans', 'Inter', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* Dark theme (default) */
:root, [data-theme="dark"] {
  --color-bg:             #0a0a0a;
  --color-surface:        #111111;
  --color-surface-2:      #171717;
  --color-surface-offset: #1a1a1a;
  --color-surface-dynamic: #222222;
  --color-divider:        #262626;
  --color-border:         #2e2e2e;

  --color-text:           #ededed;
  --color-text-muted:     #a1a1a1;
  --color-text-faint:     #666666;
  --color-text-inverse:   #0a0a0a;

  --color-primary:        #00d4aa;
  --color-primary-hover:  #00b894;
  --color-primary-active: #009e7e;
  --color-primary-dim:    rgba(0, 212, 170, 0.1);
  --color-primary-glow:   rgba(0, 212, 170, 0.06);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

/* Light theme */
[data-theme="light"] {
  --color-bg:             #fafafa;
  --color-surface:        #ffffff;
  --color-surface-2:      #f5f5f5;
  --color-surface-offset: #eeeeee;
  --color-surface-dynamic: #e5e5e5;
  --color-divider:        #e0e0e0;
  --color-border:         #d4d4d4;

  --color-text:           #171717;
  --color-text-muted:     #525252;
  --color-text-faint:     #a3a3a3;
  --color-text-inverse:   #fafafa;

  --color-primary:        #008c72;
  --color-primary-hover:  #007a63;
  --color-primary-active: #006854;
  --color-primary-dim:    rgba(0, 140, 114, 0.08);
  --color-primary-glow:   rgba(0, 140, 114, 0.04);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #fafafa;
    --color-surface:        #ffffff;
    --color-surface-2:      #f5f5f5;
    --color-surface-offset: #eeeeee;
    --color-surface-dynamic: #e5e5e5;
    --color-divider:        #e0e0e0;
    --color-border:         #d4d4d4;
    --color-text:           #171717;
    --color-text-muted:     #525252;
    --color-text-faint:     #a3a3a3;
    --color-text-inverse:   #fafafa;
    --color-primary:        #008c72;
    --color-primary-hover:  #007a63;
    --color-primary-active: #006854;
    --color-primary-dim:    rgba(0, 140, 114, 0.08);
    --color-primary-glow:   rgba(0, 140, 114, 0.04);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  }
}

/* ==========================================
   LAYOUT
   ========================================== */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

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

/* ==========================================
   HEADER / NAV
   ========================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

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

.header__logo-mark {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.header__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

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

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

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: transparent;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-dynamic);
}

/* ==========================================
   HERO
   ========================================== */

.hero {
  padding-block: clamp(var(--space-16), 12vw, var(--space-32));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 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-8);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--color-text);
  position: relative;
}

.hero__title-accent {
  color: var(--color-primary);
}

.hero__subtitle {
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-10);
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

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

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

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

/* ==========================================
   PRODUCTS SECTION
   ========================================== */

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

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

.section__header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.section__desc {
  margin-top: var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 540px;
  margin-inline: auto;
}

/* Product cards */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.product-card {
  position: relative;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.product-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary),
              0 8px 24px var(--color-primary-dim);
}

.product-card--coming-soon {
  opacity: 0.5;
}

.product-card--coming-soon:hover {
  border-color: var(--color-border);
  box-shadow: none;
  opacity: 0.5;
}

.product-card__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-dim);
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}

.product-card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.product-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.product-card__badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-primary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-primary);
  background: var(--color-primary-dim);
  font-weight: 500;
}

.product-card__badge--soon {
  color: var(--color-text-faint);
  border-color: var(--color-border);
  background: var(--color-surface-dynamic);
}

/* ==========================================
   HOW IT WORKS
   ========================================== */

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  counter-reset: step;
}

.step {
  text-align: center;
  counter-increment: step;
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}

.step__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.step__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 280px;
  margin-inline: auto;
}

/* ==========================================
   CTA SECTION
   ========================================== */

.cta-section {
  text-align: center;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  bottom: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  position: relative;
}

.cta-section__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 480px;
  margin-inline: auto;
  position: relative;
}

/* Email form */
.email-form {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  max-width: 440px;
  margin-inline: auto;
  position: relative;
}

.email-form__input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--text-sm);
}

.email-form__input::placeholder {
  color: var(--color-text-faint);
}

.email-form__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}

.email-form__btn {
  flex-shrink: 0;
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

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

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer__link {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer__link:hover {
  color: var(--color-text-muted);
}

/* ==========================================
   MOBILE
   ========================================== */

@media (max-width: 768px) {
  .header__nav {
    gap: var(--space-4);
  }

  .header__link {
    display: none;
  }

  .hero__actions {
    flex-direction: column;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .email-form {
    flex-direction: column;
  }

  .email-form__btn {
    width: 100%;
    justify-content: center;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================
   SCROLL REVEAL
   ========================================== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* For coming-soon cards, cap revealed opacity */
.product-card--coming-soon.reveal.is-visible {
  opacity: 0.5;
}