:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: #0f3460;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --accent: #4a9eff;
    --accent-hover: #3a8eef;
    --border: #2a2a4a;
    --tag-bg: #2a2a4a;
    --shadow: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --accent: #2a7de1;
    --accent-hover: #1a6dd1;
    --border: #dddddd;
    --tag-bg: #e8e8e8;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}

/* ── Header ──────────────────────────────────────── */

header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.35rem 0.55rem;
    font-size: 1rem;
    line-height: 1;
}

[data-theme="dark"] .icon-sun { display: inline; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: inline; }

#sort-select {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.35rem 0.5rem;
    font-size: 0.85rem;
    cursor: pointer;
}

.filter-dropdown {
    position: relative;
}

#filter-btn {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.35rem 0.6rem;
    font-size: 0.85rem;
    cursor: pointer;
}

.filter-menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem;
    min-width: 180px;
    max-height: 250px;
    overflow-y: auto;
    box-shadow: 0 8px 24px var(--shadow);
    z-index: 200;
}

.filter-menu.hidden {
    display: none;
}

.filter-menu label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.25rem;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 4px;
}

.filter-menu label:hover {
    background: var(--tag-bg);
}

.filter-menu input[type="checkbox"] {
    accent-color: var(--accent);
}

/* ── Project Container ───────────────────────────── */

#project-container {
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* ── Mobile: condensed list ──────────────────────── */

.project-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    gap: 0.75rem;
}

.project-row-info {
    flex: 1;
    min-width: 0;
}

.project-row-name {
    font-weight: 600;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-row-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-row-actions {
    display: flex;
    gap: 0.4rem;
    flex-shrink: 0;
}

.btn-info, .btn-open, .btn-close, #modal-close, #modal-open {
    border: none;
    border-radius: 6px;
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-info, #modal-close {
    background: var(--tag-bg);
    color: var(--text-primary);
}

.btn-info:hover, #modal-close:hover {
    background: var(--border);
}

.btn-open, #modal-open {
    background: var(--accent);
    color: #ffffff;
}

.btn-open:hover, #modal-open:hover {
    background: var(--accent-hover);
}

/* ── Desktop: card grid ──────────────────────────── */

@media (min-width: 768px) {
    #project-container {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .project-row {
        display: none;
    }

    .project-card {
        background: var(--bg-secondary);
        border: 1px solid var(--border);
        border-radius: 10px;
        overflow: hidden;
        width: calc(33.333% - 0.67rem);
        min-width: 260px;
        display: flex;
        flex-direction: column;
        box-shadow: 0 2px 12px var(--shadow);
        transition: transform 0.15s, box-shadow 0.15s;
    }

    .project-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 20px var(--shadow);
    }

    .project-card-img {
        width: 100%;
        height: 160px;
        object-fit: cover;
        display: block;
    }

    .placeholder-icon {
        width: 100%;
        height: 160px;
        background: var(--bg-card);
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .placeholder-icon::before {
        content: "";
        width: 48px;
        height: 48px;
        background: var(--border);
        border-radius: 10px;
        display: block;
    }

    .project-card-body {
        padding: 1rem;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .project-card-name {
        font-weight: 600;
        font-size: 1.05rem;
        margin-bottom: 0.35rem;
    }

    .project-card-desc {
        font-size: 0.85rem;
        color: var(--text-secondary);
        flex: 1;
        margin-bottom: 0.5rem;
    }

    .project-card-updated {
        font-size: 0.75rem;
        color: var(--text-secondary);
        margin-bottom: 0.5rem;
    }

    .project-card-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 0.3rem;
        margin-bottom: 0.75rem;
    }

    .tag {
        background: var(--tag-bg);
        color: var(--text-secondary);
        font-size: 0.7rem;
        padding: 0.15rem 0.45rem;
        border-radius: 4px;
    }

    .project-card-actions {
        display: flex;
        gap: 0.4rem;
    }
}

/* Mobile: hide cards, show rows */
@media (max-width: 767px) {
    .project-card {
        display: none;
    }
}

/* ── Modal ───────────────────────────────────────── */

dialog {
    border: none;
    border-radius: 12px;
    padding: 0;
    max-width: 460px;
    width: 90vw;
    margin: auto;
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: 0 16px 48px var(--shadow);
}

dialog::backdrop {
    background: rgba(0, 0, 0, 0.6);
}

.modal-card {
    padding: 1.5rem;
}

.modal-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.modal-card .placeholder-icon {
    width: 100%;
    height: 200px;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.modal-card .placeholder-icon.hidden,
.modal-card img.hidden {
    display: none;
}

.modal-card h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.modal-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.modal-card .tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-bottom: 1rem;
}

.modal-card .tag {
    background: var(--tag-bg);
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}