/* Obsidian Studio — Structural Architecture Design System 2026 */

:root {
    --primary: #0f172a; /* Slate Black */
    --accent: #64748b;  /* Slate Gray */
    --bg-concrete: #f1f5f9;
    --bg-white: #ffffff;
    --text-dark: #0f172a;
    --text-light: #94a3b8;
    --border-thin: 1px solid rgba(15, 23, 42, 0.1);
    --border-thick: 2px solid #0f172a;
    --transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}

body {
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-white);
    line-height: 1.5;
    letter-spacing: -0.01em;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

/* Layout Utilities */
.section-padding { padding: 120px 0; }
.bg-concrete { background-color: var(--bg-concrete); }

/* Navbar */
.navbar {
    border-bottom: var(--border-thin);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}
.navbar-brand {
    font-weight: 800;
    letter-spacing: -1px;
}
.nav-link {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-dark) !important;
}

/* Hero Section */
.hero-section {
    height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}
.hero-image-wrap {
    position: absolute;
    right: 0;
    top: 0;
    width: 55%;
    height: 100%;
    z-index: 1;
}
.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(1);
    transition: var(--transition);
}
.hero-image:hover {
    filter: grayscale(0);
}
.hero-content {
    position: relative;
    z-index: 2;
}

/* Projects Grid */
.project-item {
    position: relative;
    overflow: hidden;
    margin-bottom: 30px;
}
.project-img {
    width: 100%;
    aspect-ratio: 4/5;
    object-fit: cover;
    filter: grayscale(1);
    transition: var(--transition);
}
.project-item:hover .project-img {
    filter: grayscale(0);
    transform: scale(1.05);
}
.project-meta {
    margin-top: 20px;
}

/* Buttons */
.btn-obsidian {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0;
    padding: 15px 40px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: var(--transition);
}
.btn-obsidian:hover {
    background: var(--accent);
    color: white;
}

.btn-outline-obsidian {
    background: transparent;
    color: var(--primary);
    border: var(--border-thick);
    border-radius: 0;
    padding: 13px 40px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: var(--transition);
}
.btn-outline-obsidian:hover {
    background: var(--primary);
    color: white;
}

/* Text Elements */
.text-outline {
    -webkit-text-stroke: 1px var(--primary);
    color: transparent;
}
.technical-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent);
    display: block;
    margin-bottom: 10px;
}

/* Custom Dividers */
.structure-line {
    width: 100%;
    height: 1px;
    background: rgba(15, 23, 42, 0.1);
    margin: 40px 0;
}