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


body {
    background: var(--bg);
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    color: var(--text);
    padding: 2rem 1.5rem;
    line-height: 1.5;
}

/* subtle animated background (grid effect) */
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: 48px 48px;
    opacity: 0.2;
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
}

/* header area with accent line */
.header {
    margin-bottom: 3rem;
    position: relative;
}

.header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    display: inline-block;
}

.header h1 .gradient-text {
    background: linear-gradient(135deg, var(--text) 60%, var(--line) 90%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.header h1 i {
    color: var(--line);  /* or any color: #ff0000, blue, etc. */
    margin-right: 0.5rem;
}

.header .sub {
    color: var(--muted);
    margin-top: 0.5rem;
    font-size: 1rem;
    border-left: 3px solid var(--line);
    padding-left: 1rem;
    margin-bottom: 1rem;
}

.stats-bar {
    display: flex;
    gap: 1.2rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.file-count {
    background: var(--accent);
    padding: 0.5rem 1.2rem;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    backdrop-filter: blur(2px);
    border: 1px solid var(--border);
}

.file-count span {
    color: var(--line);
    font-weight: 700;
    margin-right: 4px;
}

/* search & filter row */
.toolbar {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    align-items: center;
    justify-content: space-between;
}

.search-wrapper {
    flex: 1;
    min-width: 220px;
}

.search-input {
    width: 100%;
    background: var(--primary);
    border: 1px solid var(--border);
    padding: 0.7rem 1rem;
    border-radius: 60px;
    color: var(--text);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--line);
    box-shadow: 0 0 0 2px rgba(0, 229, 255, 0.2);
}

.reset-btn {
    background: var(--secondary);
    border: none;
    padding: 0.6rem 1.3rem;
    border-radius: 60px;
    color: var(--text);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
}

.reset-btn:hover {
    background: var(--accent);
    color: var(--line);
}

/* card grid layout - responsive masonry style */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.8rem;
    margin-top: 0.5rem;
}

/* file card */
.file-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 1.5rem;
    padding: 1.5rem;
    transition: var(--transition);
    backdrop-filter: blur(2px);
    box-shadow: 0 8px 20px var(--shadow);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.file-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--line), var(--light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.file-card:hover::after {
    transform: scaleX(1);
}

.file-card:hover {
    border-color: var(--line);
    transform: translateY(-4px);
    box-shadow: 0 20px 28px -12px rgba(0, 229, 255, 0.2);
}

/* file icon / name area */
.file-icon {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.file-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--line);
    stroke-width: 1.5;
    fill: none;
}

.file-name {
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: -0.2px;
    word-break: break-word;
    color: var(--text);
}

.description {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 0.75rem 0 1.25rem 0;
    line-height: 1.45;
    flex: 1;
    border-left: 2px solid var(--border);
    padding-left: 0.75rem;
}

/* meta info (size, type) */
.file-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-gray);
    margin-bottom: 1.2rem;
    letter-spacing: 0.3px;
}

.file-meta span {
    background: rgba(51, 51, 51, 0.4);
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
}

/* download button */
.download-btn {
    background: transparent;
    border: 1.5px solid var(--line);
    border-radius: 40px;
    padding: 0.7rem 0;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.25s;
    color: var(--line);
    margin-top: 0.5rem;
    backdrop-filter: blur(4px);
}

.download-btn:hover {
    background: var(--line);
    color: var(--bg);
    border-color: var(--line);
    box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}

.download-btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* no results state */
.no-results {
    text-align: center;
    padding: 3rem;
    background: var(--card);
    border-radius: 2rem;
    border: 1px dashed var(--border);
    color: var(--muted);
    font-size: 1.1rem;
}

/* footer subtle */
.footer-note {
    text-align: center;
    margin-top: 3.5rem;
    font-size: 0.75rem;
    color: var(--text-gray);
    border-top: 1px solid var(--border);
    padding-top: 1.8rem;
}

@media (max-width: 640px) {
    body {
        padding: 1.2rem;
    }
    .file-name {
        font-size: 1.1rem;
    }
    .header h1 {
        font-size: 2rem;
    }
}