/* 
  Global Styles for Radiusdia Studio
  Architecture Portfolio
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600&family=Inter:wght@300;400;500&display=swap');

:root {
  /* Colors */
  --bg-color: #c0c0c0;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --accent-color: #c4a173; /* Elegant muted gold/bronze for architecture */
  --light-gray: #f5f5f5;
  --border-color: #e0e0e0;
  
  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Spacing */
  --container-width: 1400px;
  --container-padding: 2rem;
  --section-padding: 8rem 0;
  
  /* Animations */
  --transition-fast: 0.3s ease;
  --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(3rem, 6vw, 5.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.75rem;
}

p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 65ch;
}

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

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

ul, ol {
  list-style: none;
}

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

.section {
  padding: var(--section-padding);
}

.grid {
  display: grid;
  gap: 2rem;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* Modern Minimalist Components */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid var(--text-primary);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--text-primary);
  z-index: -1;
  transform: translateY(100%);
  transition: transform var(--transition-smooth);
}

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

.btn:hover::after {
  transform: translateY(0);
}

.btn-solid {
  background-color: white;
  color: #1a1a1a;
  border-color: white;
}

.btn-solid::after {
  background-color: #f0f0f0;
}

/* Animation Utilities for Intersection Observer */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Subtitle for Sections */
.section-subtitle {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
  display: block;
}

/* Responsive Overrides */
@media (max-width: 768px) {
  :root {
    --section-padding: 5rem 0;
    --container-padding: 1.5rem;
  }
}