/* ==========================================================================
   PENGUIN STUDIO — Main Stylesheet
   ==========================================================================
   Structure:
   1. Custom Properties (Design Tokens)
   2. Reset & Base
   3. Typography
   4. Layout Utilities
   5. Navigation
   6. Hero Sections
   7. Section Blocks
   8. Card System
   9. Buttons
   10. Contact Page
   11. Footer
   12. Animations
   13. Responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Palette — arctic / deep-blue identity */
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fb;
  --color-text: #1a1a2e;
  --color-text-light: #5a5a72;
  --color-accent: #1b3a5c;
  --color-accent-light: #2a5a8c;
  --color-accent-subtle: #e8eef5;
  --color-border: #e2e6ed;
  --color-card-shadow: rgba(27, 58, 92, 0.08);
  --color-card-shadow-hover: rgba(27, 58, 92, 0.16);
  --color-nav-bg: rgba(255, 255, 255, 0.92);
  --color-nav-mobile-bg: rgba(255, 255, 255, 0.97);
  --color-card-bg: #ffffff;

  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 900;

  /* Spacing scale (rem) */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Layout */
  --max-width: 1160px;
  --nav-height: 72px;
  --radius: 12px;
  --radius-sm: 8px;

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-base: 0.3s var(--ease-out);
  --transition-slow: 0.5s var(--ease-out);
}

/* --------------------------------------------------------------------------
   1b. Dark Mode
   -------------------------------------------------------------------------- */
[data-theme="dark"] {
  --color-bg: #0f1117;
  --color-bg-alt: #171a24;
  --color-text: #e8eaf0;
  --color-text-light: #9a9cb5;
  --color-accent: #6fa8dc;
  --color-accent-light: #8fc1e8;
  --color-accent-subtle: #1e2233;
  --color-border: #2a2d3e;
  --color-card-shadow: rgba(0, 0, 0, 0.2);
  --color-card-shadow-hover: rgba(0, 0, 0, 0.4);
  --color-nav-bg: rgba(15, 17, 23, 0.92);
  --color-nav-mobile-bg: rgba(15, 17, 23, 0.97);
  --color-card-bg: #171a24;
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition:
    background-color 0.4s ease,
    color 0.4s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.75rem, 6vw, 4.5rem);
  font-weight: var(--fw-black);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-bold);
}

h3 {
  font-size: 1.35rem;
  font-weight: var(--fw-semibold);
}

h4 {
  font-size: 1.1rem;
  font-weight: var(--fw-semibold);
}

p {
  max-width: 640px;
}

.text-light {
  color: var(--color-text-light);
}

.text-center {
  text-align: center;
}

/* --------------------------------------------------------------------------
   4. Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section {
  padding-block: var(--space-xl);
}

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

main {
  flex: 1;
}

/* --------------------------------------------------------------------------
   5. Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: var(--color-nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.nav__brand {
  font-size: 1.2rem;
  font-weight: var(--fw-bold);
  letter-spacing: -0.03em;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav__brand svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.nav__brand img {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  object-fit: contain;
}

/* Theme toggle — only show the icon matching current mode */
.nav__brand .brand-icon--light {
  display: block;
}
.nav__brand .brand-icon--dark {
  display: none;
}
[data-theme="dark"] .nav__brand .brand-icon--light {
  display: none;
}
[data-theme="dark"] .nav__brand .brand-icon--dark {
  display: block;
}

/* --------------------------------------------------------------------------
   5b. Theme Toggle Switch
   -------------------------------------------------------------------------- */
.theme-toggle {
  position: relative;
  width: 44px;
  height: 24px;
  background-color: var(--color-accent-subtle);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  cursor: pointer;
  transition: background-color var(--transition-base);
  flex-shrink: 0;
}

.theme-toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background-color: var(--color-accent);
  border-radius: 50%;
  transition: transform var(--transition-base);
}

[data-theme="dark"] .theme-toggle {
  background-color: var(--color-accent-subtle);
}

[data-theme="dark"] .theme-toggle::after {
  transform: translateX(20px);
}

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

.nav__link {
  font-size: 0.9rem;
  font-weight: var(--fw-medium);
  color: var(--color-text-light);
  position: relative;
  padding-block: 0.25rem;
  transition: color var(--transition-base);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-accent);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: var(--transition-base);
}

/* --------------------------------------------------------------------------
   6. Hero Sections
   -------------------------------------------------------------------------- */
.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero__content {
  padding-block: var(--space-xl);
}

.hero__visual {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--color-accent-subtle);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}



.hero__eyebrow {
  font-size: 0.85rem;
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent-light);
  margin-bottom: var(--space-sm);
}

.hero__title {
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: var(--fw-medium);
  color: var(--color-accent-light);
  margin-bottom: var(--space-md);
}

.hero__description {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 620px;
}

/* Page hero — shorter for subpages */
.page-hero {
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-sm);
}

.page-hero__title {
  margin-bottom: var(--space-sm);
}

.page-hero__description {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 640px;
}

/* --------------------------------------------------------------------------
   7. Section Blocks
   -------------------------------------------------------------------------- */
.section__header {
  margin-bottom: var(--space-xl);
}

.section__header h2 {
  margin-bottom: var(--space-xs);
}

.section__header p {
  font-size: 1.05rem;
  color: var(--color-text-light);
}

/* Preview blocks (home page) */
.preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.preview--reverse {
  direction: rtl;
}

.preview--reverse > * {
  direction: ltr;
}

.preview__text h3 {
  font-size: 1.65rem;
  margin-bottom: var(--space-sm);
}

.preview__text p {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.preview__visual {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--color-accent-subtle);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.preview__visual-label {
  font-size: 0.85rem;
  font-weight: var(--fw-medium);
  color: var(--color-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* --------------------------------------------------------------------------
   8. Card System
   -------------------------------------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px var(--color-card-shadow-hover);
}

.card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  background-color: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card__image-placeholder {
  font-size: 0.8rem;
  font-weight: var(--fw-medium);
  color: var(--color-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card__body {
  padding: var(--space-md);
}

.card__body h3 {
  margin-bottom: 0.35rem;
}

.card__meta {
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.card__body p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* --------------------------------------------------------------------------
   9. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: var(--fw-semibold);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    transform var(--transition-base);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

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

.btn--outline {
  background-color: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn--outline:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-accent);
  padding-inline: 0;
}

.btn--ghost::after {
  content: '→';
  transition: transform var(--transition-base);
}

.btn--ghost:hover::after {
  transform: translateX(4px);
}

.btn--ghost:hover {
  transform: none;
}

/* --------------------------------------------------------------------------
   10. Contact Page
   -------------------------------------------------------------------------- */
.contact {
  min-height: calc(100vh - var(--nav-height) - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--nav-height);
}

.contact__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  width: 100%;
}

.contact__inner {
  max-width: 500px;
}

.contact__inner h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-sm);
}

.contact__inner p {
  color: var(--color-text-light);
  font-size: 1.05rem;
  margin-bottom: var(--space-lg);
}

.contact__visual {
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: var(--color-accent-subtle);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.contact__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.contact__visual-placeholder {
  font-size: 0.85rem;
  font-weight: var(--fw-medium);
  color: var(--color-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.contact__copy-btn {
  position: relative;
}

.contact__toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: var(--fw-medium);
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-sm);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
  z-index: 2000;
}

.contact__toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */
.footer {
  padding-block: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.footer__text {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.footer__links {
  display: flex;
  gap: var(--space-md);
  font-size: 0.8rem;
}

.footer__link {
  color: var(--color-text-light);
  transition: color var(--transition-base);
}

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

/* --------------------------------------------------------------------------
   11b. Legal Page
   -------------------------------------------------------------------------- */
.legal__block {
  margin-bottom: var(--space-xl);
}

.legal__block h2 {
  font-size: 1.4rem;
  margin-bottom: var(--space-sm);
}

.legal__block p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--space-sm);
  max-width: 760px;
}

.legal__list {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-sm);
}

.legal__list li {
  color: var(--color-text-light);
  line-height: 1.9;
  padding-left: 1rem;
  position: relative;
}

.legal__list li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--color-accent-light);
}

/* --------------------------------------------------------------------------
   12. Animations — Fade-in on scroll
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.7s var(--ease-out),
    transform 0.7s var(--ease-out);
}

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

/* Stagger children */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 0.4s; }
.reveal-stagger > .reveal:nth-child(6) { transition-delay: 0.5s; }

/* --------------------------------------------------------------------------
   13. Responsive
   -------------------------------------------------------------------------- */

/* Tablet — ≤ 900px */
@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    max-width: 360px;
    margin-inline: auto;
  }

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

  .preview--reverse {
    direction: ltr;
  }

  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

  .contact__layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .contact__inner {
    margin-inline: auto;
  }

  .contact__visual {
    max-width: 360px;
    margin-inline: auto;
  }
}

/* Mobile — ≤ 680px */
@media (max-width: 680px) {
  :root {
    --space-2xl: 3.5rem;
    --space-xl: 2.5rem;
    --space-lg: 1.75rem;
  }

  /* Show mobile toggle */
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    flex-direction: column;
    background: var(--color-nav-mobile-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    gap: var(--space-sm);
    transform: translateY(-110%);
    opacity: 0;
    transition:
      transform 0.35s var(--ease-out),
      opacity 0.35s var(--ease-out);
    pointer-events: none;
  }

  .nav__links--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__link {
    font-size: 1rem;
    padding-block: 0.5rem;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + var(--space-lg));
    padding-bottom: var(--space-lg);
  }

  .hero__inner {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    max-width: 300px;
    margin-inline: auto;
  }

  .contact__layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .contact__inner {
    margin-inline: auto;
  }

  .contact__visual {
    max-width: 300px;
    margin-inline: auto;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}