/* ── Design Tokens ── */
: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 (4px base) */
  --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: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

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

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

  /* Fonts */
  --font-display: 'Chillax', 'Trebuchet MS', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;
}

/* ── Light Mode (Treasure Island theme) ── */
:root,
[data-theme='light'] {
  --color-bg: #faf8f2;
  --color-surface: #fff;
  --color-surface-2: #f5f0e8;
  --color-surface-offset: #eee9de;
  --color-border: #d9d2c4;
  --color-divider: #e4ddd0;

  --color-text: #1a2e1a;
  --color-text-muted: #5a6b5a;
  --color-text-faint: #9ca89c;
  --color-text-inverse: #faf8f2;

  --color-primary: #2e7d32;
  --color-primary-hover: #1b5e20;
  --color-primary-active: #0d3b0d;

  --color-accent: #00897b;
  --color-gold: #d4a017;
  --color-coral: #e07a5f;

  --shadow-sm: 0 1px 3px oklch(0.2 0.02 90 / 0.08);
  --shadow-md: 0 4px 14px oklch(0.2 0.02 90 / 0.1);
  --shadow-lg: 0 12px 36px oklch(0.2 0.02 90 / 0.14);
}

/* ── Dark Mode ── */
[data-theme='dark'] {
  --color-bg: #0f1a0f;
  --color-surface: #162016;
  --color-surface-2: #1c281c;
  --color-surface-offset: #1a241a;
  --color-border: #2e3e2e;
  --color-divider: #243024;

  --color-text: #d4ddd4;
  --color-text-muted: #8a9a8a;
  --color-text-faint: #546454;
  --color-text-inverse: #0f1a0f;

  --color-primary: #66bb6a;
  --color-primary-hover: #81c784;
  --color-primary-active: #4caf50;

  --color-accent: #4db6ac;
  --color-gold: #ffd54f;
  --color-coral: #f4a68e;

  --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 14px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 12px 36px oklch(0 0 0 / 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0f1a0f;
    --color-surface: #162016;
    --color-surface-2: #1c281c;
    --color-surface-offset: #1a241a;
    --color-border: #2e3e2e;
    --color-divider: #243024;
    --color-text: #d4ddd4;
    --color-text-muted: #8a9a8a;
    --color-text-faint: #546454;
    --color-text-inverse: #0f1a0f;
    --color-primary: #66bb6a;
    --color-primary-hover: #81c784;
    --color-primary-active: #4caf50;
    --color-accent: #4db6ac;
    --color-gold: #ffd54f;
    --color-coral: #f4a68e;
    --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.3);
    --shadow-md: 0 4px 14px oklch(0 0 0 / 0.4);
    --shadow-lg: 0 12px 36px oklch(0 0 0 / 0.5);
  }
}

/* ── Utility / Layout ── */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

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

/* ── Header ── */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s var(--ease-out);
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

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

.header__logo img {
  height: 44px;
  width: auto;
}

.header__logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-primary);
}

.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;
  font-weight: 500;
  transition: color var(--transition-interactive);
}

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

.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive);
}

.theme-toggle:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

/* ── Hero ── */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
  text-align: center;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
}

[data-theme='dark'] .hero__bg img {
  opacity: 0.1;
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.hero__logo-img {
  width: clamp(160px, 30vw, 280px);
  height: auto;
  filter: drop-shadow(0 4px 20px oklch(0 0 0 / 0.15));
  border-radius: var(--radius-2xl);
  background: transparent;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 50ch;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  transition:
    background var(--transition-interactive),
    transform var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

.hero__cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hero__cta:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* ── Section styling ── */
.section {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) 0;
}

.section--alt {
  background: var(--color-surface-2);
}

.section__header {
  text-align: center;
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-16));
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin-inline: auto;
}

/* ── Flagship product (Bubble Budget) ── */
.flagship {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 768px) {
  .flagship {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.flagship__visual {
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4/3;
  position: relative;
  overflow: hidden;
}

.flagship__visual-inner {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  width: 85%;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.flagship__emoji {
  font-size: 3rem;
  margin-bottom: var(--space-3);
}

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

.flagship__visual-bar {
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  margin-bottom: var(--space-2);
  overflow: hidden;
}

.flagship__visual-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  transition: width 1.2s var(--ease-out);
}

.flagship__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.flagship__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.flagship__name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
}

.flagship__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.flagship__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  list-style: none;
}

.flagship__features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.flagship__features li svg {
  flex-shrink: 0;
  color: var(--color-primary);
}

.flagship__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-interactive);
}

.flagship__link:hover {
  color: var(--color-primary-hover);
}

/* ── Product cards grid ── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--space-6);
}

.product-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition:
    transform var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.product-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.product-card__icon--teal { background: oklch(from var(--color-accent) l c h / 0.15); }
.product-card__icon--gold { background: oklch(from var(--color-gold) l c h / 0.15); }
.product-card__icon--coral { background: oklch(from var(--color-coral) l c h / 0.15); }

.product-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

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

.product-card__tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  width: fit-content;
}

/* ── About section ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-12);
  }
}

.about__text {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about__text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.about__visual {
  display: flex;
  justify-content: center;
}

.about__img {
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
}

/* ── Contact / CTA ── */
.cta-section {
  text-align: center;
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
}

.cta__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.cta__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 45ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

.cta__buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive),
    transform var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

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

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

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--outline:hover {
  background: oklch(from var(--color-primary) l c h / 0.1);
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-8) 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.footer__brand img {
  height: 28px;
  width: auto;
}

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

.footer__links {
  display: flex;
  gap: var(--space-4);
}

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

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

/* ── Scroll reveal animations ── */
.fade-in {
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.15s; }
.fade-in:nth-child(3) { animation-delay: 0.2s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-view {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.fade-in-view.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Mobile nav ── */
.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

@media (max-width: 767px) {
  .mobile-menu-btn {
    display: flex;
  }
  
  .header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-divider);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-4);
    box-shadow: var(--shadow-md);
  }

  .header__nav.is-open {
    display: flex;
  }

  .header__link {
    font-size: var(--text-base);
    padding: var(--space-2);
  }
}