/* Design System: The Editorial Architect (V2 - Premium Overhaul) */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Inter:wght@400;500;600&display=swap');

:root {
    /* Color Palette - Light (Stitch Material Tokens) */
    --bg: #f7f9fb;
    --text: #191c1e;
    --primary: #002045;
    --on-primary: #ffffff;
    --accent: #00b1a9;
    --surface: #ffffff;
    --surface-low: #f2f4f6;
    --surface-high: #eceef0;
    --border: rgba(196, 201, 215, 0.15);
    --shadow: 0 20px 40px rgba(0, 32, 69, 0.05);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --blur: blur(24px);
    
    /* Typography */
    --font-heading: 'Manrope', sans-serif;
    --font-body: 'Inter', sans-serif;
}

[data-theme="dark"] {
    --bg: #020617;
    --text: #f1f5f9;
    --primary: #adc7f7;
    --on-primary: #002f66;
    --accent: #00b1a9;
    --surface: #0f172a;
    --surface-low: #1e293b;
    --surface-high: #334155;
    --border: rgba(51, 65, 85, 0.4);
    --shadow: 0 32px 64px rgba(0, 0, 0, 0.3);
    --glass-bg: rgba(15, 23, 42, 0.7);
}

/* Base resets */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Blueprint Grid Texture */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image: 
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
    opacity: 0.5;
}

h1, h2, h3, h4, .font-manrope {
    font-family: var(--font-heading);
    color: var(--primary);
    letter-spacing: -0.03em;
}

[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3, [data-theme="dark"] h4 {
    color: #ffffff;
}

/* Premium Layout Elements */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-padding { padding: 96px 0; }

/* Navigation */
nav {
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--border);
    transition: padding 0.3s ease;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2.5rem;
    max-width: 1600px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: transform 0.3s ease;
}
.logo:hover { transform: scale(1.05); }

.nav-links { display: flex; gap: 3rem; }
.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 0.875rem;
    opacity: 0.7;
    transition: opacity 0.3s, color 0.3s;
    position: relative;
}
.nav-links a:hover, .nav-links a.active { opacity: 1; color: var(--accent); }
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0; width: 100%; height: 2px;
    background: var(--accent);
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.glass-card:hover { transform: translateY(-8px); border-color: var(--accent); }

/* Sidebar Responsive Logic */
.services-layout { display: flex; gap: 4rem; }
.sidebar-sticky {
    position: sticky;
    top: 120px;
    height: fit-content;
    width: 300px;
    z-index: 10;
}

@media (max-width: 1024px) {
    .services-layout { flex-direction: column; gap: 2rem; }
    .sidebar-sticky {
        position: sticky;
        top: 80px; /* Right under the nav */
        width: 100vw;
        margin-left: -2rem; /* Align with edge */
        padding: 1rem 2rem;
        display: flex;
        overflow-x: auto;
        gap: 0.75rem;
        background: var(--glass-bg);
        backdrop-filter: var(--blur);
        border-bottom: 1px solid var(--border);
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
    }
    .sidebar-sticky::-webkit-scrollbar { display: none; } /* Hide scrollbar for cleaner look */
    .category-btn { width: auto; padding: 0.75rem 1.25rem; flex-shrink: 0; }
}

/* Mobile Nav Visibility Fixes */
.mobile-nav-toggle { display: none; }
@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-nav-toggle { display: flex; }
    .nav-content { padding: 1rem 1.5rem; }
}

/* Category Filter Buttons */
.category-btn {
    width: 100%;
    padding: 1rem 1.5rem;
    text-align: left;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 0.75rem;
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text);
    opacity: 0.6;
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.category-btn.active {
    background: var(--primary);
    color: white;
    opacity: 1;
    box-shadow: 0 10px 20px rgba(0, 32, 69, 0.2);
}

/* Dark Toggle Button Styling */
.theme-toggle {
    width: 44px; height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface-low);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.theme-toggle:hover {
    background: var(--accent);
    color: white;
    transform: rotate(15deg);
}

/* Animations */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.animate-ready { opacity: 0; }
.animate-start { animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards; }