:root {
    --bg-base:        #f8fafc;
    --bg-surface:     #ffffff;
    --bg-elevated:    #f1f5f9;
    --bg-card:        #ffffff;

    --accent-primary: #2563eb;
    --accent-blue:    #3b82f6;
    --accent-green:   #16a34a;
    --accent-orange:  #d97706;
    --accent-purple:  #7c3aed;
    --accent-yellow:  #ca8a04;
    --accent-gray:    #64748b;
    --accent-error:   #dc2626;

    --text-primary:   #1e293b;
    --text-secondary: #475569;
    --text-muted:     #94a3b8;

    --border:         #e2e8f0;
    --radius-sm:      4px;
    --radius-md:      8px;
    --radius-lg:      12px;

    --font-mono:      'JetBrains Mono', 'Cascadia Code', monospace;
    --font-sans:      'Inter', system-ui, sans-serif;

    --card-width:     280px;
    --card-thumb-h:   158px;

    --nav-height:     56px;
}

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

html, body {
    height: 100%;
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ── Navbar ── */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 16px;
    height: var(--nav-height);
    padding: 0 24px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
}

.navbar__brand {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.navbar__brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.navbar__brand-title {
    font-weight: 700;
    font-size: 14px;
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

.navbar__brand-sub {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 400;
}

.navbar__brand-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-primary);
}

.navbar__spacer { flex: 1; }

.navbar__search {
    display: flex;
    align-items: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0 12px;
    gap: 8px;
    width: 260px;
}

.navbar__search input {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 13px;
    padding: 6px 0;
    width: 100%;
    outline: none;
}

.navbar__search input::placeholder {
    color: var(--text-muted);
}

/* ── User menu dropdown ── */
.user-menu {
    position: relative;
}

.user-menu__trigger {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    border-radius: var(--radius-md);
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: background 0.15s;
}

.user-menu__trigger::-webkit-details-marker { display: none; }

.user-menu__trigger:hover {
    background: var(--bg-elevated);
}

.user-menu__avatar {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--accent-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-menu__name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.user-menu__caret {
    color: var(--text-muted);
    transition: transform 0.15s;
}

details.user-menu[open] .user-menu__caret {
    transform: rotate(180deg);
}

.user-menu__dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 180px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    padding: 4px;
    z-index: 200;
}

.user-menu__item {
    display: block;
    width: 100%;
    padding: 7px 10px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-primary);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    text-decoration: none;
    transition: background 0.12s;
}

.user-menu__item:hover {
    background: var(--bg-elevated);
    text-decoration: none;
}

.user-menu__item--danger {
    color: var(--accent-error);
}

.user-menu__item--danger:hover {
    background: #fef2f2;
}

.user-menu__divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.15s;
}

.btn:hover { opacity: 0.85; }

.btn--primary {
    background: var(--accent-primary);
    color: #fff;
}

.btn--secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn--danger {
    background: #fee2e2;
    color: var(--accent-error);
    border: 1px solid #fca5a5;
}

.btn--sm {
    padding: 4px 10px;
    font-size: 12px;
}

.btn--ghost {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 2px 6px;
}

.btn--ghost:hover {
    color: var(--accent-error);
    opacity: 1;
}

/* ── Badges & pills ── */
.badge {
    display: inline-block;
    padding: 2px 7px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge--ros1_bag  { background: #fff7ed; color: #c2410c; }
.badge--ros2_mcap { background: #eff6ff; color: #1d4ed8; }
.badge--ros2_db3  { background: #f5f3ff; color: #6d28d9; }
.badge--unknown   { background: var(--bg-elevated); color: var(--text-muted); }

.status-pill {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
}

.team-pill {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    background: #fdf4ff;
    color: #7e22ce;
    border: 1px solid #e9d5ff;
}

.status-pill--ready      { background: #f0fdf4; color: #15803d; }
.status-pill--converting { background: #fffbeb; color: #b45309; }
.status-pill--pending    { background: var(--bg-elevated); color: var(--text-secondary); }
.status-pill--error      { background: #fef2f2; color: var(--accent-error); }
.status-pill--draft      { background: #f5f3ff; color: #6d28d9; }

/* ── Tag chip ── */
.tag {
    display: inline-block;
    padding: 2px 8px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 11px;
    color: var(--text-secondary);
}

.tag--clickable {
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    font-family: inherit;
}

.tag--clickable:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #fff;
}

.tag--active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #fff;
}

/* ── Edit modal ── */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    padding: 24px;
    width: 100%;
    max-width: 440px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal__close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 18px;
    line-height: 1;
    padding: 2px 4px;
}

.modal__close:hover { color: var(--text-primary); }

.modal__field {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.modal__label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

.modal__input {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 13px;
    padding: 7px 10px;
    font-family: inherit;
    width: 100%;
}

.modal__input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.modal__footer {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 4px;
}

/* tags input inside modal */
.modal .tags-input {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 4px 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
    cursor: text;
    min-height: 36px;
}

.modal .tags-input:focus-within {
    border-color: var(--accent-primary);
}

.modal .tags-input input {
    border: none;
    background: none;
    outline: none;
    font-size: 13px;
    color: var(--text-primary);
    min-width: 80px;
    flex: 1;
    padding: 2px 0;
    font-family: inherit;
}

/* ── Spinner ── */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.hidden { display: none !important; }

/* ── Tag chips ── */
.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 2px 8px;
    background: var(--accent-primary);
    border: 1px solid var(--accent-primary);
    border-radius: 999px;
    font-size: 11px;
    color: #fff;
    line-height: 1.4;
}

.tag-chip__remove {
    cursor: pointer;
    color: rgba(255,255,255,0.65);
    font-size: 13px;
    line-height: 1;
    margin-left: 1px;
}

.tag-chip__remove:hover { color: #fff; }

/* ── Progress bar ── */
.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar__fill {
    height: 100%;
    background: var(--accent-primary);
    transition: width 0.4s ease;
}

/* ── Background watermark ── */
body::before {
    content: '';
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 420px;
    height: 420px;
    background: url('/static/img/kaist_usrg_vertical.png') center / contain no-repeat;
    opacity: 0.06;
    pointer-events: none;
    z-index: 0;
}

.page-content {
    position: relative;
    z-index: 1;
}