/*
 * Global stylesheet for the Studio Sera website.
 *
 * This file defines a minimal design system based off of the
 * existing site. Colours and spacing mirror the original dark
 * palette, while providing a light mode alternative. The
 * variables defined at the root level make it easy to adjust
 * colours without having to update individual rules. Media
 * queries ensure sensible typography scaling and responsive
 * layouts.
 */

/* CSS variables for both themes. These are overwritten when
 * the `data-theme="dark"` attribute is present on the `html`
 * element. */
:root {
  /* Font family */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  /* Light mode colours */
  --color-bg: #ffffff;
  --color-text: #171717;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-card-bg: #f9fafb;
  --color-btn-bg: #111827;
  --color-btn-text: #ffffff;
  --color-btn-hover: #374151;
  --color-gradient-from: #ff4689;
  --color-gradient-to: #3a2be2;
}

/* Dark mode overrides */
html[data-theme="dark"] {
  --color-bg: #0a0a0a;
  --color-text: #f4f4f5;
  --color-muted: #a1a1aa;
  --color-border: #27272a;
  --color-card-bg: #111827;
  --color-btn-bg: #1f2937;
  --color-btn-text: #ffffff;
  --color-btn-hover: #374151;
}

/* Reset and base typography */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: background-color 0.3s, color 0.3s;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
}

/* Layout wrappers */
.container {
  width: 100%;
  max-width: 1200px;
  padding: 0 1rem;
  margin: 0 auto;
}

header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(6px);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.nav-items {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.nav-items a {
  position: relative;
  padding: 0.5rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color 0.2s, color 0.2s;
}

.nav-items a:hover {
  background-color: var(--color-card-bg);
}

.nav-separator {
  width: 1px;
  height: 1.25rem;
  background-color: var(--color-border);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-gradient {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #ffffff;
  background-image: linear-gradient(to right, var(--color-gradient-from), var(--color-gradient-to));
  border-radius: 1rem;
  transition: opacity 0.2s;
}

.btn-gradient:hover {
  opacity: 0.9;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  background-color: transparent;
  transition: background-color 0.2s;
}

.btn-outline:hover {
  background-color: var(--color-card-bg);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background-color: transparent;
  color: var(--color-text);
  transition: background-color 0.2s;
}

.theme-toggle:hover {
  background-color: var(--color-card-bg);
}

main {
  flex: 1;
}

/* Hero section */
.hero {
  position: relative;
  overflow: hidden;
  padding: 5rem 0 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
}

.hero .video-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.6) 100%);
  z-index: -1;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  margin-bottom: 1rem;
  font-weight: 700;
  line-height: 1.1;
  transition: transform 0.3s;
  /* force white heading for readability on the video */
  color: #ffffff;
}

.hero p {
  font-size: clamp(1rem, 3vw, 1.25rem);
  margin-bottom: 2rem;
  /* lighter muted colour on hero for contrast */
  color: rgba(255, 255, 255, 0.8);
  transition: transform 0.3s;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Grid for featured work */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}

.featured-card {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  overflow: hidden;
  background-color: var(--color-card-bg);
  transition: transform 0.3s, box-shadow 0.3s;
}

.featured-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.featured-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
}

.featured-card .card-content {
  padding: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 500;
}

.featured-card .card-content svg {
  width: 1rem;
  height: 1rem;
  opacity: 0.6;
  transition: opacity 0.3s;
}

.featured-card:hover .card-content svg {
  opacity: 1;
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-align: center;
}

/* Cards */
.card-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

.card {
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  background-color: var(--color-card-bg);
  flex: 1 1 280px;
  max-width: 350px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  flex-grow: 1;
  margin-bottom: 1.25rem;
}

/* Forms */
form {
  display: grid;
  gap: 1rem;
  max-width: 500px;
  width: 100%;
}

input, textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  background-color: var(--color-card-bg);
  color: var(--color-text);
  font-size: 1rem;
  /* Ensure form fields use the same font as the rest of the site */
  font-family: var(--font-sans);
  resize: vertical;
}

textarea {
  min-height: 120px;
}

/* Footer */
footer {
  padding: 2rem 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

@media (max-width: 640px) {
  .nav-items {
    display: none;
  }
  .nav {
    justify-content: space-between;
  }
}

/* Phone-only Home link in nav */
.nav-home-link,
.nav-home-separator {
  display: none;
}

@media (max-width: 768px) {
  .nav-home-link,
  .nav-home-separator {
    display: inline-flex;
  }
}