/* ===========================
   OshyLabs — 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 */
  --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;

  /* Typography */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', 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;
}

/* ===========================
   Light Mode (Default)
   =========================== */
:root, [data-theme="light"] {
  --color-bg:             #fafaf8;
  --color-surface:        #ffffff;
  --color-surface-2:      #f5f5f3;
  --color-surface-offset: #f0efed;
  --color-divider:        #e5e4e1;
  --color-border:         #d4d3d0;

  --color-text:           #1a1a1a;
  --color-text-muted:     #6b6b6b;
  --color-text-faint:     #a3a3a3;

  --color-primary:        #1a1a1a;
  --color-primary-hover:  #333333;

  --color-accent:         #0066ff;
  --color-accent-light:   #e8f0ff;

  --color-live:           #16a34a;
  --color-building:       #d97706;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
}

/* ===========================
   Dark Mode
   =========================== */
[data-theme="dark"] {
  --color-bg:             #0e0e0e;
  --color-surface:        #171717;
  --color-surface-2:      #1e1e1e;
  --color-surface-offset: #1a1a1a;
  --color-divider:        #2a2a2a;
  --color-border:         #333333;

  --color-text:           #e5e5e5;
  --color-text-muted:     #999999;
  --color-text-faint:     #666666;

  --color-primary:        #e5e5e5;
  --color-primary-hover:  #cccccc;

  --color-accent:         #4d94ff;
  --color-accent-light:   #1a2a44;

  --color-live:           #22c55e;
  --color-building:       #f59e0b;

  --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);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0e0e0e;
    --color-surface:        #171717;
    --color-surface-2:      #1e1e1e;
    --color-surface-offset: #1a1a1a;
    --color-divider:        #2a2a2a;
    --color-border:         #333333;
    --color-text:           #e5e5e5;
    --color-text-muted:     #999999;
    --color-text-faint:     #666666;
    --color-primary:        #e5e5e5;
    --color-primary-hover:  #cccccc;
    --color-accent:         #4d94ff;
    --color-accent-light:   #1a2a44;
    --color-live:           #22c55e;
    --color-building:       #f59e0b;
    --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);
  }
}

/* ===========================
   Skip Link
   =========================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-bg);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  z-index: 200;
  transition: top 0.2s ease;
}

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

/* ===========================
   Header
   =========================== */
.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);
  transition: box-shadow 0.3s ease;
}

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

.header__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo__mark { flex-shrink: 0; }

.logo__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
}

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

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

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

.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  background: var(--color-bg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: var(--space-8);
}

.mobile-menu__link {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.mobile-theme-toggle {
  margin-top: var(--space-4);
}

@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .mobile-menu { display: block; }
}

/* ===========================
   Hero
   =========================== */
.hero {
  padding: clamp(var(--space-16), 12vw, var(--space-32)) var(--space-6);
  padding-bottom: clamp(var(--space-12), 8vw, var(--space-24));
}

.hero__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.hero__tag {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

.hero__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}

.hero__stats {
  display: flex;
  gap: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  display: block;
  color: var(--color-text);
}

.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: all var(--transition-interactive);
  cursor: pointer;
  border: none;
}

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

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

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

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

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ===========================
   Section Headers
   =========================== */
.section-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 480px;
}

.section-header {
  margin-bottom: var(--space-12);
}

/* ===========================
   Products
   =========================== */
.products {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}

.products__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.product-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: all var(--transition-interactive);
}

.product-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.product-card--featured {
  grid-column: span 1;
  background: var(--color-surface);
  border-color: var(--color-border);
}

.product-card__icon {
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.product-card__icon svg {
  display: inline-block;
}

.product-card__badge {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-live) 12%, transparent);
  color: var(--color-live);
}

.product-card__badge--building {
  background: color-mix(in srgb, var(--color-building) 12%, transparent);
  color: var(--color-building);
}

.product-card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.product-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex-grow: 1;
}

.product-card__meta {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.meta-tag {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
}

.product-card__stack {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 400;
}

.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  margin-top: var(--space-2);
}

.product-card__link svg {
  display: inline-block;
  transition: transform var(--transition-interactive);
}

.product-card__link:hover svg {
  transform: translate(2px, -2px);
}

.product-card__link--soon {
  color: var(--color-text-faint);
  font-weight: 500;
}

/* First two cards span full width on large screens */
@media (min-width: 900px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .product-card--featured {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   Pricing
   =========================== */
.pricing {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
  background: var(--color-surface-2);
}

.pricing__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.pricing-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: all var(--transition-interactive);
}

.pricing-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.pricing-card--popular {
  border-color: var(--color-text);
  border-width: 2px;
}

.pricing-card--popular:hover {
  box-shadow: var(--shadow-lg);
}

.pricing-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-bg);
}

.pricing-card__header {
  text-align: center;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}

.pricing-card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

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

.pricing-card__period {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

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

.pricing-card__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex-grow: 1;
}

.pricing-card__features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.5;
}

.pricing-card__features li svg {
  flex-shrink: 0;
  display: inline-block;
}

.pricing-card__btn {
  width: 100%;
  justify-content: center;
  margin-top: var(--space-2);
}

/* Pricing Details */
.pricing-details {
  margin-top: var(--space-12);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.pricing-details__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.pricing-details__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.pricing-detail strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.pricing-detail p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

@media (max-width: 900px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }
  .pricing-details__grid {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   Stack Section
   =========================== */
.stack-section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
  background: var(--color-surface-2);
}

.stack-section__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

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

.stack-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  min-width: 140px;
  flex: 1;
  text-align: center;
}

.stack-item__icon {
  color: var(--color-text-muted);
}

.stack-item__icon svg {
  display: inline-block;
}

.stack-item__name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
}

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

@media (max-width: 640px) {
  .stack-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }
  .stack-item:last-child {
    grid-column: span 2;
  }
}

/* ===========================
   About
   =========================== */
.about {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}

.about__inner {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
}

.about__portrait {
  flex-shrink: 0;
}

.about__img {
  width: clamp(160px, 20vw, 260px);
  height: clamp(160px, 20vw, 260px);
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  filter: grayscale(1);
  transition: filter 0.4s ease;
}

.about__img:hover {
  filter: grayscale(0);
}

.about__content {
  flex: 1;
  min-width: 0;
}

@media (max-width: 768px) {
  .about__inner {
    flex-direction: column;
    text-align: center;
  }
  .about__links {
    justify-content: center;
  }
}

.about__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}

.about__links {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}

.about__social {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
}

.about__social svg {
  display: inline-block;
  flex-shrink: 0;
}

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

/* ===========================
   Contact
   =========================== */
.contact {
  padding: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-6);
  text-align: center;
  background: var(--color-surface-2);
}

.contact__inner {
  max-width: var(--content-narrow);
  margin: 0 auto;
}

.contact .section-title {
  font-size: var(--text-2xl);
}

.contact__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}

/* ===========================
   Footer
   =========================== */
.footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.footer__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__left {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

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

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

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

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

/* ===========================
   Scroll Reveal Animations
   =========================== */
.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);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}