:root,
:root.light-mode {
    --brand-color: rgb(16, 131, 254);
    --primary-color: rgb(7, 10, 13);
    --secondary-color: rgb(66, 86, 108);
    --bg-primary-color: rgb(255, 255, 255);
    --bg-secondary-color: rgb(240, 242, 245);
    --border-color: rgb(220, 225, 230);
    --danger-color: rgb(220, 38, 38);
    --success-color: rgb(22, 163, 74);
    --warning-color: rgb(234, 179, 8);
    --table-stripe: rgba(0, 0, 0, 0.02);
}

@media (prefers-color-scheme: dark) {
    :root {
        --brand-color: rgb(16, 131, 254);
        --primary-color: rgb(255, 255, 255);
        --secondary-color: rgb(133, 152, 173);
        --bg-primary-color: rgb(7, 10, 13);
        --bg-secondary-color: rgb(13, 18, 23);
        --border-color: rgb(40, 45, 55);
        --table-stripe: rgba(255, 255, 255, 0.02);
    }
}

:root.dark-mode {
    --brand-color: rgb(16, 131, 254);
    --primary-color: rgb(255, 255, 255);
    --secondary-color: rgb(133, 152, 173);
    --bg-primary-color: rgb(7, 10, 13);
    --bg-secondary-color: rgb(13, 18, 23);
    --border-color: rgb(40, 45, 55);
    --table-stripe: rgba(255, 255, 255, 0.02);
}

/* --- Reset & Base ------------------------------------------- */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-secondary-color);
    color: var(--primary-color);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

/* --- Layout: Sidebar + Main --------------------------------- */

.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    background: var(--bg-primary-color);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.sidebar-title {
    font-size: 0.8125rem;
    font-weight: 700;
    padding: 0 20px;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-subtitle {
    font-size: 0.6875rem;
    color: var(--secondary-color);
    padding: 0 20px;
    margin-bottom: 20px;
}

.sidebar nav {
    flex: 1;
}

.sidebar nav a {
    display: block;
    padding: 8px 20px;
    font-size: 0.8125rem;
    color: var(--secondary-color);
    text-decoration: none;
    transition: background 0.1s, color 0.1s;
}

.sidebar nav a:hover {
    background: var(--bg-secondary-color);
    color: var(--primary-color);
}

.sidebar nav a.active {
    color: var(--brand-color);
    font-weight: 500;
}

.sidebar-footer {
    padding: 16px 20px 0;
    border-top: 1px solid var(--border-color);
    margin-top: 16px;
}

.sidebar-footer .session-info {
    font-size: 0.75rem;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.sidebar-footer form {
    display: inline;
}

.sidebar-footer button {
    background: none;
    border: none;
    font-size: 0.75rem;
    color: var(--secondary-color);
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
}

.sidebar-footer button:hover {
    color: var(--primary-color);
}

.main {
    margin-left: 220px;
    flex: 1;
    padding: 32px;
    max-width: 960px;
}

/* --- Common Components -------------------------------------- */

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.page-subtitle {
    font-size: 0.8125rem;
    color: var(--secondary-color);
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    margin-top: -20px;
    margin-bottom: 24px;
    word-break: break-all;
}

.page-description {
    font-size: 0.875rem;
    color: var(--secondary-color);
    margin-top: -16px;
    margin-bottom: 24px;
}

.flash-success {
    background: rgba(22, 163, 74, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(22, 163, 74, 0.2);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.875rem;
    margin-bottom: 20px;
}

.flash-error {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.875rem;
    margin-bottom: 20px;
}

/* --- Buttons ------------------------------------------------ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity 0.15s;
    text-decoration: none;
}

.btn:hover {
    opacity: 0.85;
}

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

.btn-danger {
    background: var(--danger-color);
    color: #fff;
    border-color: var(--danger-color);
}

.btn-warning {
    background: var(--warning-color);
    color: #000;
    border-color: var(--warning-color);
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.75rem;
}

.btn-outline-danger {
    background: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

/* --- Detail Sections ---------------------------------------- */

.detail-section {
    background: var(--bg-primary-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 16px;
}

.detail-section h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 0.8125rem;
    border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-row .label {
    color: var(--secondary-color);
    flex-shrink: 0;
}

.detail-row .value {
    font-weight: 500;
    word-break: break-all;
    text-align: right;
    max-width: 65%;
}

.detail-row .value a {
    color: var(--brand-color);
    text-decoration: none;
}

.detail-row .value a:hover {
    text-decoration: underline;
}

/* --- Tables ------------------------------------------------- */

.table-container {
    background: var(--bg-primary-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

tbody tr {
    border-bottom: 1px solid var(--border-color);
}

tbody tr:last-child {
    border-bottom: none;
}

tbody tr:nth-child(even) {
    background: var(--table-stripe);
}

tbody td {
    padding: 10px 16px;
    font-size: 0.8125rem;
}

tbody td a {
    color: var(--brand-color);
    text-decoration: none;
}

tbody td a:hover {
    text-decoration: underline;
}

/* --- Badges ------------------------------------------------- */

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: rgba(22, 163, 74, 0.1);
    color: var(--success-color);
}

.badge-danger {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger-color);
}

.badge-warning {
    background: rgba(234, 179, 8, 0.1);
    color: var(--warning-color);
}

/* --- Forms -------------------------------------------------- */

.form-card {
    background: var(--bg-primary-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 24px;
    max-width: 480px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--primary-color);
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary-color);
    color: var(--primary-color);
    outline: none;
    transition: border-color 0.15s;
}

.form-group input:focus {
    border-color: var(--brand-color);
}

.form-group .hint {
    font-size: 0.75rem;
    color: var(--secondary-color);
    margin-top: 4px;
}

.search-form {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.search-form input {
    flex: 1;
    padding: 10px 12px;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary-color);
    color: var(--primary-color);
    outline: none;
}

.search-form input:focus {
    border-color: var(--brand-color);
}

.create-form {
    display: flex;
    gap: 8px;
    align-items: flex-end;
    margin-bottom: 24px;
}

.create-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.create-form label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--secondary-color);
}

.create-form input[type="number"] {
    padding: 10px 12px;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary-color);
    color: var(--primary-color);
    outline: none;
    width: 120px;
}

.create-form input[type="number"]:focus {
    border-color: var(--brand-color);
}

/* --- Utility ------------------------------------------------ */

.mono-text {
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.75rem;
}

.inline-form {
    display: inline;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--secondary-color);
    font-size: 0.875rem;
}

.load-more {
    text-align: center;
    padding: 16px;
}

.load-more a {
    color: var(--brand-color);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.load-more a:hover {
    text-decoration: underline;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 16px 0;
}

.pagination-info {
    font-size: 0.8125rem;
    color: var(--secondary-color);
}

/* --- Dashboard: Cards --------------------------------------- */

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.card {
    background: var(--bg-primary-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
}

.card-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.card-value {
    font-size: 1.25rem;
    font-weight: 600;
}

.card-value.success {
    color: var(--success-color);
}

.card-value.danger {
    color: var(--danger-color);
}

/* --- Accounts: DID Cell ------------------------------------- */

.did-cell {
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.75rem;
    color: var(--secondary-color);
}

/* --- Account Detail ----------------------------------------- */

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.actions form {
    display: inline;
}

.actions .btn {
    padding: 8px 16px;
    font-size: 0.8125rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary-color);
    color: var(--primary-color);
}

.actions .btn-primary {
    background: var(--brand-color);
    color: #fff;
    border-color: var(--brand-color);
}

.actions .btn-danger {
    background: var(--danger-color);
    color: #fff;
    border-color: var(--danger-color);
}

.actions .btn-warning {
    background: var(--warning-color);
    color: #000;
    border-color: var(--warning-color);
}

.password-box {
    background: rgba(22, 163, 74, 0.08);
    border: 1px solid rgba(22, 163, 74, 0.2);
    border-radius: 10px;
    padding: 16px 20px;
    margin-bottom: 16px;
}

.password-box .pw-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--success-color);
    margin-bottom: 6px;
}

.password-box .pw-value {
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 1rem;
    font-weight: 600;
    user-select: all;
}

.back-link {
    display: inline-block;
    color: var(--brand-color);
    text-decoration: none;
    font-size: 0.8125rem;
    margin-bottom: 16px;
}

.back-link:hover {
    text-decoration: underline;
}

.collection-list {
    max-height: 200px;
    overflow-y: auto;
    padding: 8px 0;
}

.collection-item {
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.75rem;
    padding: 4px 0;
    color: var(--secondary-color);
    border-bottom: 1px solid var(--border-color);
}

.collection-item:last-child {
    border-bottom: none;
}

.threat-sig {
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.75rem;
    padding: 4px 0;
    color: var(--secondary-color);
}

/* --- Create Account ----------------------------------------- */

.success-card {
    background: var(--bg-primary-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 24px;
    max-width: 480px;
}

.success-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--success-color);
    margin-bottom: 16px;
}

.success-card .detail-row .value {
    display: flex;
    align-items: center;
    gap: 6px;
}

.password-highlight {
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    background: rgba(22, 163, 74, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    user-select: all;
}

.copy-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.6875rem;
    cursor: pointer;
    color: var(--secondary-color);
    transition: color 0.15s, border-color 0.15s;
    white-space: nowrap;
}

.copy-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* --- Invite Codes ------------------------------------------- */

.code-box {
    background: rgba(22, 163, 74, 0.08);
    border: 1px solid rgba(22, 163, 74, 0.2);
    border-radius: 10px;
    padding: 16px 20px;
    margin-bottom: 24px;
}

.code-box .code-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--success-color);
    margin-bottom: 6px;
}

.code-box .code-value {
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 1rem;
    font-weight: 600;
    user-select: all;
}

.code-cell {
    font-family: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.75rem;
}

/* --- Login Page --------------------------------------------- */

.login-card {
    background: var(--bg-primary-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    margin: 20px;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 4px;
}

.login-subtitle {
    font-size: 0.875rem;
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: 32px;
}

.login-card .form-group {
    margin-bottom: 20px;
}

.login-card .form-group label {
    font-size: 0.875rem;
}

.login-card .btn-primary {
    width: 100%;
}

.error-msg {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.875rem;
    margin-bottom: 20px;
}

/* --- Error Page ---------------------------------------------- */

.centered {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.error-card {
    background: var(--bg-primary-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    max-width: 480px;
    width: 100%;
    margin: 20px;
}

.error-card--inset {
    margin: 60px auto;
}

.error-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: var(--danger-color);
}

.error-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.error-message {
    font-size: 0.875rem;
    color: var(--secondary-color);
    margin-bottom: 24px;
    line-height: 1.5;
}

.error-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    background: var(--brand-color);
    color: #fff;
    transition: opacity 0.15s;
}

.error-link:hover {
    opacity: 0.85;
}

/* --- Mobile: Topbar + Hamburger ----------------------------- */

.topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 52px;
    background: var(--bg-primary-color);
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    z-index: 100;
}

.topbar-title {
    font-size: 0.875rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex-shrink: 0;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

body.sidebar-open .hamburger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

body.sidebar-open .hamburger span:nth-child(2) {
    opacity: 0;
}

body.sidebar-open .hamburger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 149;
}

/* --- Responsive --------------------------------------------- */

@media (max-width: 768px) {
    .topbar {
        display: flex;
    }

    .sidebar {
        transform: translateX(-220px);
        transition: transform 0.25s ease;
        z-index: 150;
    }

    body.sidebar-open .sidebar {
        transform: translateX(0);
    }

    body.sidebar-open .sidebar-overlay {
        display: block;
    }

    .main {
        margin-left: 0;
        padding: 24px 16px;
        padding-top: 76px; /* 52px topbar + 24px breathing room */
    }

    /* Tables scroll horizontally */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Cards: single column */
    .cards {
        grid-template-columns: 1fr;
    }

    /* Form cards: full width */
    .form-card,
    .success-card {
        max-width: 100%;
    }

    /* Search / create forms: stack vertically */
    .search-form,
    .create-form {
        flex-direction: column;
        align-items: stretch;
    }

    .create-form input[type="number"] {
        width: 100%;
    }

    /* Detail rows wrap on narrow screens */
    .detail-row {
        flex-wrap: wrap;
        gap: 4px;
    }

    .detail-row .value {
        max-width: 100%;
        text-align: left;
    }

    /* Actions wrap tightly */
    .actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .actions form,
    .actions .btn {
        width: 100%;
        display: block;
        text-align: center;
    }
}