:root {
    /* Colors */
    --bg-color: hsl(220, 45%, 8%);
    --card-bg: rgba(255, 255, 255, 0.05);
    --accent-color: hsl(28, 95%, 55%);
    --accent-hover: hsl(28, 95%, 65%);
    --text-main: hsl(220, 20%, 98%);
    --text-muted: hsl(220, 10%, 70%);
    --nav-bg: rgba(15, 23, 42, 0.8);
    
    /* Layout */
    --container-width: 1200px;
    --nav-height: 80px;
    --radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(251, 146, 60, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(30, 58, 138, 0.2) 0%, transparent 40%);
    min-height: 100vh;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    height: var(--nav-height);
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    color: var(--accent-color);
}

.search-bar {
    position: relative;
    flex: 0 1 400px;
    margin: 0 20px;
}

.search-bar i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 18px;
}

.search-bar input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    color: white;
    font-family: inherit;
    transition: var(--transition);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 20px rgba(251, 146, 60, 0.2);
}

.nav-links {
    display: flex;
    gap: 15px;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    padding: 8px 16px;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-btn:hover, .nav-btn.active {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.1);
}

/* Hero Section */
.hero {
    padding: 80px 0;
    text-align: center;
    animation: fadeIn 1s ease-out;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
}

/* Categories Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 60px;
}

.card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 30px;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(8px);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(251, 146, 60, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.card:hover::before {
    transform: scaleX(1);
}

.card h3 {
    font-size: 1.4rem;
    margin: 15px 0 10px;
    color: var(--accent-color);
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.card-icon {
    width: 50px;
    height: 50px;
    background: rgba(251, 146, 60, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
}

/* Method Detail */
.method-view {
    padding: 40px 0;
}

.method-header {
    margin-bottom: 40px;
    text-align: center;
}

.method-header h2 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.breadcrumb {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    font-weight: 600;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
}

.tab-btn:hover {
    color: white;
}

.tab-btn.active {
    background: var(--accent-color);
    color: white;
}

.content-body {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.content-body h1, .content-body h2, .content-body h3 {
    margin: 25px 0 15px;
    color: var(--accent-color);
}

.content-body p {
    margin-bottom: 15px;
}

.content-body ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

/* Footer */
.footer {
    padding: 60px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 100px;
    color: var(--text-muted);
    text-align: center;
}

/* Search Results */
.search-results {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 40px;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .navbar { height: auto; padding: 15px 0; }
    .navbar .container { flex-direction: column; gap: 15px; }
    .search-bar { width: 100%; margin: 0; }
    .hero h1 { font-size: 2.2rem; }
    .content-body { padding: 20px; }
}