:root {
    --color-grey: #6B7280;
    --color-background-alt: #F5F5F5;
}

/* Tighter spacing */
.page-container {
    margin: 0 var(--spacing-md);
}

.card {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.card h2 {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
}

.section {
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-sm);
}

.form-group {
    margin-bottom: var(--spacing-xs);
}

h1, h2, h3, h4 {
    margin-bottom: var(--spacing-sm);
}

th, td {
    padding: var(--spacing-xs) var(--spacing-sm);
}

button, .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
}

input, select, textarea {
    padding: var(--spacing-sm);
}

.input-row {
    gap: var(--spacing-md);
}

.nav-header {
    padding: var(--spacing-sm) 0;
}

footer {
    padding: var(--spacing-lg) var(--spacing-md);
    margin-top: var(--spacing-xl);
}

/* Stepper */
.stepper {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: var(--spacing-lg) 0;
    gap: 0;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
    background: none;
    border: none;
    padding: 0;
    font: inherit;
    outline: none;
    transition: transform 0.1s;
}

.step:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

.step:active {
    transform: translateY(1px);
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--color-grey);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    color: var(--color-grey);
    background: #fff;
    transition: all 0.2s;
}

.step-label {
    margin-top: 4px;
    font-size: 12px;
    color: var(--color-grey);
    text-align: center;
    white-space: nowrap;
    transition: color 0.2s;
}

.step.active .step-number {
    border-color: var(--color-green);
    background: var(--color-green);
    color: #fff;
}

.step.active .step-label {
    color: var(--color-black);
    font-weight: 600;
}

.step.completed .step-number {
    border-color: var(--color-green);
    background: var(--color-green);
    color: #fff;
}

.step.completed .step-label {
    color: var(--color-black);
}

.step-line {
    flex: 1;
    height: 2px;
    background: var(--color-grey);
    margin: 0 8px;
    margin-bottom: 20px;
    transition: background 0.2s;
}

.step-line.completed {
    background: var(--color-green);
}

/* Step navigation buttons */
.step-nav {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-lg);
}

/* Save/Load buttons in nav */
.nav-header-nav .btn {
    margin-right: var(--spacing-sm);
}

/* Fix date input alignment */
input[type="date"] {
    box-sizing: border-box;
}

.total-row td {
    border-top: 2px solid var(--color-black);
}
#elementsTable input[type="number"] {
    width: 80px;
}
#elementsTable select {
    min-width: 120px;
}
.op-input {
    width: 100px;
}
canvas {
    width: 100%;
    max-width: 800px;
}
.dim-input {
    width: 120px;
}

/* Database page */
.sortable {
    cursor: pointer;
    user-select: none;
}

.sortable:hover {
    background: var(--color-background-alt);
}

.sort-arrow {
    font-size: 12px;
}

.summary-count {
    margin-top: var(--spacing-sm);
    color: var(--color-grey);
    font-size: var(--font-size-sm);
}

.filter-controls .input-row {
    align-items: flex-end;
}

.materials-table td {
    font-size: var(--font-size-sm);
}

/* Mobile */
@media (max-width: 768px) {
    .page-container {
        margin: 0 var(--spacing-xs);
    }

    .card {
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .input-row {
        gap: var(--spacing-sm);
    }

    .form-group {
        margin-bottom: var(--spacing-sm);
    }

    h2 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-sm);
    }

    th, td {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }

    .nav-header {
        padding: var(--spacing-sm) 0;
    }

    .nav-header-container {
        padding: 0 var(--spacing-sm);
    }

    /* Stepper mobile */
    .step-label {
        display: none;
    }

    .step-line {
        margin-bottom: 0;
    }

    .stepper {
        margin: var(--spacing-md) var(--spacing-sm);
    }

    /* Touch targets */
    input, select, button {
        min-height: 44px;
    }

    /* Remove fixed widths on mobile */
    .op-input,
    .dim-input,
    #elementsTable input[type="number"],
    #elementsTable select {
        width: 100%;
        min-width: 0;
    }

    /* Elements table: card layout */
    #elementsTable thead {
        display: none;
    }

    #elementsTable tbody tr {
        display: block;
        border: 1px solid var(--color-border);
        border-radius: 0;
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    #elementsTable tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 4px 0;
        border: none;
    }

    #elementsTable tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        font-size: var(--font-size-sm);
        margin-right: var(--spacing-sm);
        flex-shrink: 0;
    }

    /* Materials table: card layout */
    .materials-table thead {
        display: none;
    }

    .materials-table tbody tr {
        display: block;
        border: 1px solid var(--color-border);
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .materials-table tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 4px 0;
        border: none;
    }

    .materials-table tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        font-size: var(--font-size-sm);
        margin-right: var(--spacing-sm);
        flex-shrink: 0;
    }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: #fff;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.modal-content.large {
    max-width: 1000px;
}

.modal-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: var(--spacing-md);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

.close-modal {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

/* Wall Builder Styles */
.layer-material-select {
    width: 100%;
    min-width: 200px;
}

.bg-light {
    background: var(--color-background-alt);
    border: 1px solid #ddd;
}

.result-card hr {
    margin: var(--spacing-sm) 0;
    border: 0;
    border-top: 1px solid #ccc;
}