/* ==========================================================================
   Art & Frame Depot - Design System
   ========================================================================== */

:root {
  /* Colors */
  --color-bg-dark: #1a1a2e; /* Deep charcoal */
  --color-bg-darker: #131322;
  --color-bg-card: #23233a;
  --color-accent-gold: #c9a84c; /* Warm gold */
  --color-accent-gold-hover: #b0913c;
  --color-text-main: #f0ece2; /* Warm white */
  --color-text-muted: #a0a0b0;
  --color-border: #33334a;

  /* Typography */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;

  /* Sizing Constraints */
  --container-max-width: 1200px;
  --container-padding: 2rem;

  /* Animation */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-dark);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-text-main);
}

a {
  color: var(--color-accent-gold);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-gold-hover);
}

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

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 5rem 0;
}

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

main {
  flex-grow: 1; /* Pushes footer to bottom */
}

/* ==========================================================================
   Typography Utilities
   ========================================================================== */

.text-center { text-align: center; }
.text-gold { color: var(--color-accent-gold); }
.text-muted { color: var(--color-text-muted); }

.section-header {
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--color-accent-gold);
  margin-top: 1rem;
}
.section-title.center::after {
  margin-left: auto;
  margin-right: auto;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 600px;
}
.section-subtitle.center {
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   Components: Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  text-align: center;
}

.btn-primary {
  background-color: var(--color-accent-gold);
  color: var(--color-bg-dark) !important; /* Overriding link color */
}

.btn-primary:hover {
  background-color: var(--color-accent-gold-hover);
  color: var(--color-bg-dark) !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(201, 168, 76, 0.3);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-accent-gold);
  color: var(--color-accent-gold) !important;
}

.btn-outline:hover {
  background-color: var(--color-accent-gold);
  color: var(--color-bg-dark) !important;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

header {
  background-color: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-main) !important;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-accent {
  color: var(--color-accent-gold);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--color-text-main);
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent-gold);
  transition: width var(--transition-fast);
}

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

.nav-link:hover {
  color: var(--color-text-main);
}

.nav-cta {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer {
  background-color: var(--color-bg-darker);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--color-accent-gold);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--color-text-muted);
}

.footer-links a:hover {
  color: var(--color-accent-gold);
}

.footer-contact p {
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.footer-contact i {
  color: var(--color-accent-gold);
  margin-top: 0.25rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--color-bg-dark);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    opacity: 0;
    pointer-events: none;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .section {
    padding: 3rem 0;
  }

  .section-title {
    font-size: 2rem;
  }
}