/* Unified Theme Variables */
:root {
    --bg: #0f172a;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --card-bg: #1e293b;
    --border-color: #334155;
    --border-radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
    padding: 2rem;
}

/* Typography */
h1, h2, h3 { color: var(--text-main); line-height: 1.2; }
h1 { font-size: 2.5rem; margin-bottom: 0.5rem; letter-spacing: -0.05rem; }
h2 { font-size: 1.5rem; }
p { color: var(--text-muted); margin-bottom: 1rem; }
a { color: var(--accent); text-decoration: none; transition: 0.2s; }
a:hover { text-decoration: underline; }

/* Header & Controls */
.header-container {
    max-width: 1200px;
    margin: 0 auto 3rem auto;
}

.controls {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

.filter-group label, .sort-group label {
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--accent);
    display: block;
    margin-bottom: 0.25rem;
}

select {
    padding: 0.5rem;
    border-radius: 4px;
    background-color: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    font-size: 1rem;
    outline: none;
}
select:focus { border-color: var(--accent); }

/* The Responsive Grid */
.grid-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

/* Project Card Styles */
.project-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, border-color 0.2s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}

.card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-title {
    margin: 0 0 0.5rem 0;
    font-size: 1.2rem;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0 0 1rem 0;
    display: -webkit-box;
    line-clamp: 3;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-skills {
    margin-top: auto;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.skill-tag {
    background: var(--bg);
    color: var(--text-main);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: monospace;
    border: 1px solid var(--border-color);
}

/* Side Panel Styles */
.side-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 500px;
    height: 100vh;
    background-color: var(--card-bg);
    border-left: 1px solid var(--border-color);
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.side-panel.open { transform: translateX(0); }

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 { margin: 0; }

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}
.close-btn:hover { color: var(--text-main); }

.panel-content { padding: 1.5rem; }

/* Modern Carousel Styles */
.carousel-container {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.carousel {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.carousel::-webkit-scrollbar { display: none; }

.carousel img {
    flex: 0 0 100%;
    width: 100%;
    height: 250px;
    object-fit: cover;
    scroll-snap-align: start;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(15, 23, 42, 0.7); /* Match dark bg */
    color: var(--text-main);
    border: 1px solid var(--border-color);
    width: 35px;
    height: 35px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    opacity: 0;
    transition: all 0.2s ease;
}

.carousel-container:hover .carousel-btn { opacity: 1; }
.carousel-btn:hover { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.prev-btn { left: 10px; }
.next-btn { right: 10px; }

.carousel-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 10;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(226, 232, 240, 0.3);
    cursor: pointer;
    transition: background 0.3s ease;
}
.dot.active { background: var(--accent); }

.panel-details p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* Buttons */
.panel-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 4px; /* Matched to skill-tag radius */
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    flex: 1;
    font-family: monospace;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg);
    border: 1px solid var(--accent);
}
.btn-primary:hover {
    background-color: transparent;
    color: var(--accent);
    text-decoration: none;
}

.btn-outline {
    border: 1px solid var(--border-color);
    color: var(--text-main);
    background-color: var(--bg);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    text-decoration: none;
}

/* The dark overlay behind the panel */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.8); /* Darker overlay to match theme */
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.overlay.active {
    opacity: 1;
    pointer-events: all;
}