:root {
  --primary-900: #0f172a;
  --primary-700: #1e293b;
  --primary-600: #334155;
  --primary-500: #64748b;
  --primary-200: #e2e8f0;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.12);
  --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 1rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

.site-header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-900);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

.logo svg {
    width: 32px;
    height: 32px;
    color: var(--accent-purple);
}

.brand-block {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

/* Main Nav */
.main-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.main-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
}

.main-nav a:hover {
    color: var(--accent-purple);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-purple);
    transition: width 0.3s ease;
}

.main-nav a:hover::after {
    width: 100%;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-btn .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    background-color: var(--primary-900);
    border-radius: 2px;
}

.mobile-menu-btn.active .bar:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-btn.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-btn.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

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

    .main-nav {
        position: fixed;
        left: -100%;
        top: 70px;
        gap: 0;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: left 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .main-nav.active {
        left: 0;
    }

    .main-nav a {
        display: block;
        margin: 1.5rem 0;
        font-size: 1.25rem;
    }

    .main-nav a::after {
        display: none;
    }
}

.hero-section {
    padding: 5rem 0;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
}

.hero-section h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
    font-weight: 800;
    line-height: 1.2;
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, var(--primary-900) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-section p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.search-bar {
    max-width: 600px;
    margin: 2rem auto 0;
    position: relative;
    z-index: 1;
    display: flex;
    gap: 0.5rem;
}

.search-bar input {
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    font-size: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    background: var(--bg-primary);
}

.search-bar input::placeholder {
    color: var(--text-tertiary);
}

.search-bar input:focus {
    outline: none;
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-purple);
    transform: translateY(-2px);
}

.search-bar button {
    padding: 1rem 1.5rem;
    background: var(--accent-purple);
    border: none;
    border-radius: 9999px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.search-bar button:hover {
    background: var(--accent-pink);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.masonry-grid {
    padding: 3rem 0;
}

.site-footer {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-700) 100%);
    color: white;
    margin-top: 4rem;
}

.site-footer a {
    color: #e2e8f0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.site-footer a:hover {
    color: var(--accent-purple);
}

.site-footer h4 {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.footer-contact-section {
    margin-bottom: 2rem;
}

.social-links a {
    display: inline-block;
    margin-right: 1.5rem;
    font-weight: 600;
}

/* Responsive Footer */
@media (max-width: 768px) {
    .site-footer {
        padding: 2.5rem 0;
    }

    .footer-contact-section {
        margin-bottom: 1.5rem;
    }

    .social-links {
        flex-direction: column;
        gap: 0.5rem !important;
    }

    .social-links a {
        margin-right: 0;
    }
}