/* ==========================================================================
   Oval Ventures — Style Sheet
   Dark-themed VC landing page
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Custom Properties
   -------------------------------------------------------------------------- */

:root {
  --bg-primary: #1a1629;
  --bg-secondary: #2b2b2b;
  --bg-card-dark: #352c4d;
  --bg-card-accent: #483c5c;
  --bg-pattern: #0e141c;
  --text-primary: #fff;
  --text-secondary: rgba(255, 255, 255, 0.76);
  --text-muted: rgba(217, 199, 255, 0.52);
  --gradient-purple: linear-gradient(45deg, #9080f2 0%, #87a5f5 75%);
  --gradient-pink: linear-gradient(45deg, #e3a1a1 0%, #9080f2 75%);
  --gradient-coral: linear-gradient(45deg, #e36f6f 0%, #e3a1a1 60%);
  --font-heading: "Sora", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --content-width: 60rem;
  --card-width: 38rem;
  --card-radius: 1.375rem;
  --padding-x: 4rem;
  --padding-y: 4rem;
  --gap: 2rem;
  --transition-fast: 0.25s ease;
  --transition-medium: 0.5s ease-in-out;
}

/* --------------------------------------------------------------------------
   2. Reset + Base
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 18px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.625;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. Background Pattern
   -------------------------------------------------------------------------- */

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: url("../assets/images/bg.svg") repeat;
  background-size: auto;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   4. Loading Overlay
   -------------------------------------------------------------------------- */

body.is-loading::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg-primary);
  opacity: 1;
  transition: opacity 1s ease;
}

body.is-playing::after {
  opacity: 0;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   5. Layout
   -------------------------------------------------------------------------- */

#wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#main {
  flex: 1;
  display: flex;
  justify-content: center;
}

.inner {
  max-width: var(--content-width);
  width: 100%;
  padding: var(--padding-y) var(--padding-x);
}

/* --------------------------------------------------------------------------
   6. Header
   -------------------------------------------------------------------------- */

#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(26, 22, 41, 0.85);
}

.header-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1.5rem var(--padding-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo img {
  height: 2rem;
  width: auto;
  opacity: 0.9;
  transition: opacity var(--transition-fast);
}

.logo:hover img {
  opacity: 1;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-link.active,
.nav-link:hover {
  color: var(--text-primary);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.social-links a:hover {
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   7. Section Transitions
   -------------------------------------------------------------------------- */

section {
  opacity: 0;
  transition: opacity var(--transition-medium);
}

section.active {
  opacity: 1;
}

section.inactive {
  opacity: 0;
  height: 0;
  overflow: hidden;
  pointer-events: none;
  position: absolute;
}

/* --------------------------------------------------------------------------
   8. Hero
   -------------------------------------------------------------------------- */

.hero {
  text-align: center;
  padding: 8rem 0 6rem;
  max-width: 50rem;
  margin: 0 auto;
}

h1 {
  font-family: var(--font-heading);
  font-size: 3em;
  font-weight: 500;
  line-height: 1.125;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.125em;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.625;
  max-width: 40rem;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   9. Service Cards
   -------------------------------------------------------------------------- */

.services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
  margin: 4rem 0;
}

.service-card {
  padding: 2.5rem 2rem;
  border-radius: var(--card-radius);
  position: relative;
  overflow: hidden;
}

/* Noise texture overlay */
.service-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  pointer-events: none;
}

.card-purple {
  background: var(--gradient-purple);
}

.card-pink {
  background: var(--gradient-pink);
}

.card-coral {
  background: var(--gradient-coral);
}

.service-card h2 {
  font-family: var(--font-heading);
  font-size: 1.25em;
  font-weight: 500;
  margin-bottom: 1rem;
  color: #fff;
  position: relative;
  z-index: 1;
}

.service-card p {
  font-size: 0.9375em;
  font-weight: 300;
  line-height: 1.625;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   10. OV Deal
   -------------------------------------------------------------------------- */

.ov-deal {
  background: var(--bg-secondary);
  border-radius: var(--card-radius);
  padding: 4rem 3rem;
  text-align: center;
  margin: 4rem 0;
}

.ov-deal h2 {
  font-family: var(--font-heading);
  font-size: 2em;
  font-weight: 500;
  margin-bottom: 1rem;
}

.ov-deal p {
  font-size: 1.125em;
  color: var(--text-secondary);
  line-height: 1.625;
}

.ov-deal strong {
  color: var(--text-primary);
  font-weight: 400;
}

/* --------------------------------------------------------------------------
   11. Portfolio
   -------------------------------------------------------------------------- */

.portfolio-header {
  text-align: center;
  padding: 8rem 0 4rem;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
  margin-bottom: 4rem;
}

.portfolio-item {
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: transform var(--transition-fast);
}

.portfolio-item:hover {
  transform: translateY(-0.25rem);
}

.portfolio-image {
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.portfolio-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}

.portfolio-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 1;
}

.portfolio-name {
  font-family: var(--font-heading);
  font-size: 1.25em;
  font-weight: 500;
  color: #fff;
  letter-spacing: 0.02em;
  position: relative;
  z-index: 2;
}

/* --------------------------------------------------------------------------
   12. Footer
   -------------------------------------------------------------------------- */

#footer {
  padding: 4rem var(--padding-x);
  text-align: center;
}

#footer p {
  font-size: 0.875em;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   13. Scroll Animations
   -------------------------------------------------------------------------- */

[data-animate] {
  opacity: 0;
  transition:
    opacity 0.6s ease,
    transform 0.6s ease,
    filter 0.6s ease;
}

[data-animate].is-visible {
  opacity: 1;
  transform: none;
  filter: none;
}

[data-animate="fade-up"] {
  transform: translateY(2rem);
}

[data-animate="fade-down"] {
  transform: translateY(-2rem);
}

[data-animate="fade-left"] {
  transform: translateX(2rem);
}

[data-animate="fade-right"] {
  transform: translateX(-2rem);
}

[data-animate="zoom-in"] {
  transform: scale(0.9);
}

[data-animate="zoom-out"] {
  transform: scale(1.1);
}

[data-animate="blur-in"] {
  filter: blur(8px);
}

/* --------------------------------------------------------------------------
   14. Responsive Breakpoints
   -------------------------------------------------------------------------- */

/* Large desktop */
@media (max-width: 1680px) {
  html {
    font-size: 16px;
  }
}

/* Medium desktop / small laptop */
@media (max-width: 1200px) {
  .services {
    grid-template-columns: repeat(2, 1fr);
  }

  .services .service-card:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
    justify-self: center;
  }

  :root {
    --padding-x: 3rem;
    --padding-y: 3rem;
  }
}

/* Tablet landscape */
@media (max-width: 980px) {
  html {
    font-size: 14px;
  }

  .hero {
    padding: 6rem 0 4rem;
  }

  .services {
    margin: 3rem 0;
  }

  .ov-deal {
    padding: 3rem 2rem;
    margin: 3rem 0;
  }

  .portfolio-header {
    padding: 6rem 0 3rem;
  }
}

/* Tablet portrait / large phone */
@media (max-width: 736px) {
  :root {
    --padding-x: 2rem;
    --padding-y: 2rem;
  }

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

  .services .service-card:last-child {
    max-width: 100%;
    grid-column: auto;
  }

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

  .hero {
    padding: 5rem 0 3rem;
  }

  h1 {
    font-size: 2.25em;
  }

  .header-inner {
    padding: 1rem var(--padding-x);
  }

  .nav-links {
    gap: 1.25rem;
  }

  .nav-link {
    font-size: 0.75rem;
  }
}

/* Small phone */
@media (max-width: 480px) {
  h1 {
    font-size: 1.875em;
  }

  .hero-subtitle {
    font-size: 1em;
  }

  .hero {
    padding: 4rem 0 2.5rem;
  }

  .service-card {
    padding: 2rem 1.5rem;
  }

  .ov-deal {
    padding: 2.5rem 1.5rem;
  }

  .ov-deal h2 {
    font-size: 1.5em;
  }

  .portfolio-header {
    padding: 5rem 0 2rem;
  }
}

/* Minimum width */
@media (max-width: 360px) {
  :root {
    --padding-x: 1.5rem;
    --padding-y: 1.5rem;
  }

  h1 {
    font-size: 1.625em;
  }

  .header-inner {
    padding: 0.875rem var(--padding-x);
  }
}