:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --primary: #1b4f88;
    --primary-light: #3e7ccf;
    --secondary: #0d1f3b;
    --text: #16213b;
    --muted: #556082;
    --success: #2ecc71;
    --danger: #e74c3c;
    --border: #d7dee8;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(180deg, #eaf2fb 0%, #f4f7fb 40%, #eef5fb 100%);
    color: var(--text);
}

.admin-page {
    width: min(1120px, 100%);
    margin: 0 auto;
    padding: 2rem 1rem 3rem;
}

.admin-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    box-shadow: 0 18px 45px rgba(9, 30, 66, 0.08);
    padding: 2rem;
}

.auth-brand {
    max-width: 42rem;
    margin-bottom: 1.5rem;
}

.auth-brand h1,
.dashboard-header h2 {
    margin: 0 0 0.5rem;
    color: var(--secondary);
}

.auth-brand p,
.dashboard-header p,
.auth-note,
.dashboard-message,
.auth-message {
    color: var(--muted);
    line-height: 1.6;
}

.modal {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    background: rgba(9, 30, 66, 0.45);
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    width: min(540px, 100%);
    background: var(--surface);
    border-radius: 1.25rem;
    padding: 1.5rem;
    box-shadow: 0 22px 60px rgba(9, 30, 66, 0.16);
    position: relative;
}

.close-btn {
    position: absolute;
    right: 1rem;
    top: 1rem;
    border: none;
    background: transparent;
    color: var(--secondary);
    font-size: 1.8rem;
    line-height: 1;
    cursor: pointer;
}

.auth-actions-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.auth-return {
    margin-top: 1rem;
}

.auth-forms,
.portfolio-section,
.new-item-panel {
    display: grid;
    gap: 1rem;
}

.auth-form,
.item-form,
.portfolio-item {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
}

.auth-form.hidden,
.new-item-panel.hidden,
#dashboard-panel.hidden,
.auth-panel.hidden,
.admin-panel.hidden {
    display: none;
}

.auth-form h2,
.new-item-panel h3,
.portfolio-header h3 {
    margin-top: 0;
    color: var(--secondary);
}

.auth-form label,
.item-form label {
    display: block;
    margin-top: 1rem;
    font-weight: 600;
    color: var(--secondary);
}

.auth-form input,
.auth-form textarea,
.item-form input,
.item-form textarea,
.portfolio-item input,
.portfolio-item textarea {
    width: 100%;
        margin-top: 0.4rem;
        padding: 0.75rem 0.95rem;
        border-radius: 0.75rem;
        border: 1px solid var(--border);
        background: #f8fbff;
        font-size: 0.95rem;
        color: var(--text);
    }

    .item-form-row {
        display: grid;
        gap: 1rem;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        align-items: end;
    }

    .item-form-row > div {
        display: grid;
        gap: 0.45rem;
    }

    .item-form label {
        margin-top: 0;
    font-size: 0.9rem;
}

.image-preview {
    display: block;
    width: 100%;
    max-width: 320px;
    margin: 1rem 0 0;
    border-radius: 1rem;
    border: 1px solid var(--border);
    object-fit: cover;
}

.image-preview.hidden {
    display: none;
}

.auth-form button,
.item-form button,
.portfolio-item button,
.primary-btn,
.secondary-btn {
    border: none;
    border-radius: 0.85rem;
    padding: 0.95rem 1.25rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
}

.primary-btn:hover {
    transform: translateY(-1px);
}

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

.secondary-btn:hover {
    background: rgba(27, 79, 136, 0.08);
}

.auth-message,
.dashboard-message {
    padding: 1rem 1.25rem;
    border-radius: 0.85rem;
    border: 1px solid transparent;
}

.auth-message.success,
.dashboard-message.success {
    background: #ecf9f2;
    border-color: rgba(46, 204, 113, 0.35);
    color: var(--success);
}

.auth-message.error,
.dashboard-message.error {
    background: #fde7e9;
    border-color: rgba(231, 76, 60, 0.35);
    color: var(--danger);
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.dashboard-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.dashboard-user-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.admin-user-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 1rem;
    margin-bottom: 1rem;
    background: #f8fbff;
}

.admin-user-card span {
    color: var(--text);
    font-weight: 600;
    word-break: break-all;
}

.user-list p.info-text {
    margin: 0;
    color: var(--muted);
}

#admin-email-display {
    color: var(--muted);
    font-size: 0.95rem;
}

.user-form {
    display: grid;
    gap: 0.85rem;
}

.user-form label {
    display: grid;
    grid-template-columns: 140px 1fr;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    color: var(--secondary);
}

.user-form input {
    margin-top: 0;
}

.user-form button {
    margin-top: 0.25rem;
}

.portfolio-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.portfolio-list {
    display: grid;
    gap: 1rem;
}

.portfolio-item {
    display: grid;
    gap: 1rem;
    grid-template-columns: 180px 1fr;
    align-items: start;
}

.portfolio-item--compact {
    grid-template-columns: 140px 1fr;
    align-items: center;
}

.portfolio-item-summary {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.portfolio-item-summary h4 {
    margin: 0 0 0.35rem;
    color: var(--secondary);
    font-size: 1.05rem;
}

.portfolio-item-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.icon-btn {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border: none;
    border-radius: 999px;
    background: rgba(27, 79, 136, 0.08);
    color: var(--primary);
    cursor: pointer;
}

.icon-btn:hover {
    background: rgba(27, 79, 136, 0.15);
}

.portfolio-item-meta,
.portfolio-item-description {
    margin: 0;
    color: var(--muted);
    line-height: 1.45;
}

.portfolio-item-price {
    margin: 0.25rem 0 0;
    font-weight: 700;
    color: var(--primary);
}

.portfolio-item img {
    width: 100%;
    min-height: 160px;
    object-fit: cover;
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.portfolio-item-content {
    display: grid;
    gap: 0.95rem;
}

.portfolio-item-row {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.portfolio-item textarea {
    min-height: 90px;
}

.item-form-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 820px) {
    .portfolio-item,
    .portfolio-item--compact,
    .portfolio-item-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .admin-panel {
        padding: 1.25rem;
    }

    .dashboard-header,
    .dashboard-actions,
    .dashboard-user-actions,
    .portfolio-header,
    .item-form-actions,
    .auth-actions-row {
        flex-direction: column;
        align-items: stretch;
    }

    .dashboard-actions,
    .dashboard-user-actions,
    .portfolio-header,
    .item-form-actions,
    .auth-actions-row,
    .auth-return {
        width: 100%;
    }

    .dashboard-actions > *,
    .dashboard-user-actions > *,
    .portfolio-header > *,
    .item-form-actions > *,
    .auth-actions-row > *,
    .auth-return > * {
        width: 100%;
        text-align: center;
    }

    .auth-form button,
    .item-form button,
    .portfolio-item button,
    .primary-btn,
    .secondary-btn {
        width: 100%;
        margin-top: 0.75rem;
    }
}

a {
    color: inherit;
    text-decoration: none;
}

.admin-panel + .admin-panel {
    margin-top: 1.5rem;
}

button {
    margin-top: 1rem;
}