/* ───────────── Design Tokens ───────────── */
:root {
    --bg-primary: #f8f9fb;
    --bg-secondary: #ffffff;
    --bg-card: #f1f3f7;
    --bg-hover: #e8ebf0;
    --bg-input: #ffffff;
    --border: #dce0e8;
    --border-focus: #6366f1;
    --text-primary: #1a1d2b;
    --text-secondary: #555b6e;
    --text-muted: #8b92a5;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --danger: #e5393d;
    --danger-hover: #c62828;
    --success: #16a34a;
    --warning: #d97706;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: 180ms cubic-bezier(.4,0,.2,1);
}

/* ───────────── Reset & Base ───────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ───────────── App Shell ───────────── */
.app {
    max-width: 960px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

/* ───────────── Header ───────────── */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 12px;
}
.header-left { display: flex; align-items: center; gap: 12px; }
.logo {
    width: 38px; height: 38px;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 700; color: white;
    box-shadow: 0 2px 10px var(--accent-glow);
    flex-shrink: 0;
}
.header h1 {
    font-size: 20px; font-weight: 700;
    color: var(--text-primary);
}
.header-right { display: flex; gap: 8px; flex-wrap: wrap; }

/* ───────────── Buttons ───────────── */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit; font-size: 13px; font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.btn:hover { background: var(--bg-hover); border-color: var(--text-muted); }
.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); box-shadow: 0 2px 12px var(--accent-glow); }
.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: rgba(229,57,61,0.06); }
.btn-ghost { border: none; background: none; padding: 6px 8px; }
.btn-ghost:hover { background: var(--bg-hover); }
.btn-icon {
    width: 32px; height: 32px; padding: 0;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm); border: none;
    background: none; color: var(--text-muted); cursor: pointer;
    transition: all var(--transition);
}
.btn-icon:hover { background: var(--bg-hover); color: var(--text-primary); }
.btn-icon.danger:hover { color: var(--danger); background: rgba(229,57,61,0.06); }

/* ───────────── Search Bar ───────────── */
.search-bar {
    position: relative;
    margin-bottom: 16px;
}
.search-bar svg {
    position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
    color: var(--text-muted); pointer-events: none;
}
.search-bar input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit; font-size: 14px;
    transition: all var(--transition);
    outline: none;
}
.search-bar input::placeholder { color: var(--text-muted); }
.search-bar input:focus { border-color: var(--border-focus); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-count {
    position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
    font-size: 12px; color: var(--text-muted);
}

/* ───────────── Status Bar ───────────── */
.status-bar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 12px;
    font-size: 13px; color: var(--text-muted);
    flex-wrap: wrap; gap: 8px;
}
.status-bar-left { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

/* ───────────── Table (Desktop) ───────────── */
.table-wrapper {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    box-shadow: var(--shadow-sm);
}
table { width: 100%; border-collapse: collapse; min-width: 0; }
thead th {
    padding: 10px 16px;
    font-size: 11px; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.04em;
    color: var(--text-muted);
    text-align: left;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    user-select: none; cursor: pointer;
    transition: color var(--transition);
    white-space: nowrap;
}
thead th:hover { color: var(--text-secondary); }
thead th .sort-icon { margin-left: 4px; opacity: 0; transition: opacity var(--transition); }
thead th:hover .sort-icon, thead th.sorted .sort-icon { opacity: 1; }
tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--bg-card); }
tbody td {
    padding: 10px 16px;
    font-size: 14px;
    vertical-align: middle;
}
.col-url { }
.col-alias { width: 140px; }
.col-short { min-width: 220px; }
.col-actions { width: 50px; text-align: right; }

/* ───────────── Cell Content ───────────── */
.cell-url {
    display: block;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    color: var(--text-primary);
    max-width: 380px;
}
.cell-alias {
    font-weight: 600;
    color: var(--accent);
}
.cell-short a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: color var(--transition);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 280px;
}
.cell-short a:hover { color: var(--accent); }

/* ───────────── Editable Cells ───────────── */
.editable {
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: all var(--transition);
}
.editable:hover {
    border-color: var(--border);
    background: var(--bg-card);
}
.editable.editing {
    border-color: var(--border-focus);
    background: var(--bg-input);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.edit-input {
    background: transparent;
    border: none; outline: none;
    color: var(--text-primary);
    font-family: inherit; font-size: 14px;
    width: 100%;
}

/* ───────────── Copy Button ───────────── */
.copy-wrap { display: flex; align-items: center; gap: 4px; }
.copy-btn { opacity: 0; transition: opacity var(--transition); }
tr:hover .copy-btn { opacity: 1; }

/* ───────────── Empty State ───────────── */
.empty-state {
    padding: 48px 24px;
    text-align: center;
}
.empty-state svg { color: var(--text-muted); margin-bottom: 12px; }
.empty-state h3 { font-size: 16px; font-weight: 600; color: var(--text-secondary); margin-bottom: 4px; }
.empty-state p { font-size: 14px; color: var(--text-muted); }

/* ───────────── Modal ───────────── */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
    opacity: 0; pointer-events: none;
    transition: opacity 200ms ease;
    padding: 16px;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 24px;
    width: 400px; max-width: 100%;
    transform: translateY(8px) scale(0.98);
    transition: transform 200ms ease;
}
.modal-overlay.active .modal { transform: translateY(0) scale(1); }
.modal h2 { font-size: 17px; font-weight: 600; margin-bottom: 18px; }
.modal label {
    display: block; font-size: 12px; font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase; letter-spacing: 0.04em;
    margin-bottom: 6px;
}
.modal input[type="text"], .modal input[type="password"] {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit; font-size: 14px;
    outline: none;
    transition: all var(--transition);
    margin-bottom: 14px;
}
.modal input:focus { border-color: var(--border-focus); box-shadow: 0 0 0 3px var(--accent-glow); }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 4px; }

/* ───────────── Toast Notifications ───────────── */
.toast-container {
    position: fixed; bottom: 20px; right: 20px;
    display: flex; flex-direction: column; gap: 8px;
    z-index: 2000; pointer-events: none;
    max-width: calc(100vw - 32px);
}
.toast {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: 14px; color: var(--text-primary);
    pointer-events: auto;
    animation: toastIn 250ms ease forwards;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error   { border-left: 3px solid var(--danger); }
.toast.info    { border-left: 3px solid var(--accent); }
.toast.removing { animation: toastOut 200ms ease forwards; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(8px); } }
.toast-icon { flex-shrink: 0; }

/* ───────────── Secret Badge ───────────── */
.secret-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px; font-weight: 500;
    background: rgba(99,102,241,0.08);
    color: var(--accent);
    border: 1px solid rgba(99,102,241,0.15);
}
.secret-badge.none { background: rgba(217,119,6,0.08); color: var(--warning); border-color: rgba(217,119,6,0.15); }
.secret-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ───────────── Paginator ───────────── */
.paginator {
    display: flex; align-items: center; justify-content: center;
    gap: 4px; margin-top: 16px;
}
.paginator button {
    min-width: 34px; height: 34px;
    display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-family: inherit; font-size: 13px; font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}
.paginator button:hover { background: var(--bg-hover); color: var(--text-primary); }
.paginator button.active { background: var(--accent); border-color: var(--accent); color: white; }
.paginator button:disabled { opacity: 0.35; cursor: not-allowed; }

/* ───────────── Loading Skeleton ───────────── */
.skeleton-row td { padding: 16px; }
.skeleton {
    height: 14px;
    background: linear-gradient(90deg, var(--bg-card) 25%, var(--border) 50%, var(--bg-card) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ───────────── Confirm Modal Text ───────────── */
#confirmMessage {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 18px;
    line-height: 1.5;
}

/* ───────────── Mobile: Card Layout ───────────── */
@media (max-width: 640px) {
    .app { padding: 16px 12px 60px; }

    .header h1 { font-size: 18px; }

    .search-bar input { font-size: 16px; /* prevents iOS zoom */ }

    /* Hide the real table header */
    .table-wrapper { border: none; box-shadow: none; background: transparent; overflow: visible; }
    table, thead, tbody, tr, th, td { display: block; width: 100%; }
    thead { display: none; }

    /* Each row becomes a card */
    tbody tr {
        background: var(--bg-secondary);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        margin-bottom: 10px;
        padding: 14px 16px;
        display: flex;
        flex-direction: column;
        gap: 6px;
        position: relative;
    }
    tbody tr:hover { background: var(--bg-secondary); }

    tbody td {
        padding: 0;
        font-size: 14px;
    }
    tbody td::before {
        display: block;
        font-size: 10px;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        color: var(--text-muted);
        margin-bottom: 2px;
    }
    .col-url { max-width: 100%; }
    .col-url::before { content: "URL"; }
    .col-alias { width: 100%; }
    .col-alias::before { content: "Alias"; }
    .col-short { width: 100%; }
    .col-short::before { content: "Short URL"; }
    .col-actions {
        width: 100%; text-align: left;
        padding-top: 6px;
        border-top: 1px solid var(--border);
    }

    .cell-url { max-width: 100%; white-space: normal; word-break: break-all; }
    .copy-btn { opacity: 1; }

    /* Paginator wraps */
    .paginator { flex-wrap: wrap; }
}