@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap');

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

:root {
    /* Brand and semantic colors */
    --color-brand: #009fb8;
    --color-primary: #006b78; /* Tummattu saavutettavuuden takia */
    --color-primary-hover: #005461;
    --color-success: #087f5b;
    --color-warning: #9a6700;
    --color-error: #b42318;
    
    /* Surfaces */
    --color-bg: #f4f7f8;
    --color-surface: #ffffff;
    --color-surface-subtle: #eef5f6;
    
    /* Text */
    --color-text: #17212b;
    --color-text-secondary: #475569;
    --color-border: #cbd5e1;

    /* Legacy mapping */
    --primary-color: var(--color-primary);
    --primary-hover: var(--color-primary-hover);
    --bg-color: var(--color-bg);
    --card-bg: var(--color-surface);
    --text-color: var(--color-text);
    --border-color: var(--color-border);
    --error-color: var(--color-error);
    --surface-subtle: var(--color-surface-subtle);
}

body {
    font-family: 'Open Sans', system-ui, sans-serif;
    font-weight: 400;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
}

h1 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    line-height: 1.2;
    font-weight: 800;
    margin: 0;
}

h2 {
    font-size: 1.375rem;
    line-height: 1.3;
    font-weight: 800;
    margin-top: 0;
}

h3, .korostus {
    font-weight: 700;
}

header {
    background-color: var(--card-bg);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.uef-prefix {
    color: var(--color-brand);
    font-weight: 800;
    letter-spacing: -0.75px;
}

header p {
    margin: 0.5rem 0 0 0;
    color: var(--color-text-secondary);
}

.container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 1440px;
    margin-inline: auto;
    padding: 2rem;
}

@media (max-width: 900px) {
    .container {
        padding: 1rem;
    }
}

.container > * {
    min-width: 0;
}

.sidebar {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

#forecast-form {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: stretch;
}

fieldset {
    flex: 1 1 300px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1rem;
    margin-bottom: 0;
    background-color: #fafafa;
}

#error-summary, #calculate-btn {
    flex: 1 1 100%;
}

legend {
    font-weight: 700;
    color: var(--color-primary);
    background-color: var(--bg-color);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1rem;
}

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

.form-row .form-group {
    flex: 1;
    min-width: 120px;
}

label {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.field-hint {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.45;
    margin-top: 0;
    margin-bottom: 0.25rem;
}

input[type="number"], select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
    font-family: inherit;
    font-size: 1rem;
}

:where(button, input, select, summary, a):focus-visible {
    outline: 3px solid #ffbf47;
    outline-offset: 3px;
}

button {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--primary-hover);
}

button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    background-color: var(--color-text-secondary);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    text-align: center;
}

.card.card-avoided {
    border-left: 4px solid var(--color-success);
}

.card h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.card .card-val {
    margin: 0 0 0.5rem 0;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary-color);
}

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

.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
    max-width: 100%;
}

.chart-card {
    margin: 0 0 2rem 0;
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    max-width: 100%;
    min-width: 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
    background: var(--card-bg);
}

.data-table th,
.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    text-align: right;
    vertical-align: top;
}

.data-table th:first-child,
.data-table td:first-child {
    text-align: left;
}

.data-table thead th {
    background: var(--surface-subtle);
    font-weight: 700;
    border-top: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background: #f8fafc;
}

.formulas-section {
    grid-column: 1 / -1;
}

.formula-code {
    display: block; 
    padding: 0.75rem; 
    background: var(--color-text); 
    color: var(--color-bg);
    border-radius: 4px; 
    margin-top: 0.5rem;
    font-family: monospace;
    overflow-x: auto;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

@media (max-width: 768px) {
    .data-table, .data-table tbody, .data-table tr, .data-table td {
        display: block;
        width: 100%;
    }
    
    .data-table thead {
        display: none;
    }
    
    .data-table tr {
        margin-bottom: 1.5rem;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        background: var(--card-bg);
        overflow: hidden;
    }
    
    .data-table td {
        text-align: right;
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        flex-direction: column;
        align-items: flex-end;
        position: relative;
    }
    
    .data-table td:last-child {
        border-bottom: none;
        background: var(--surface-subtle);
    }
    
    .data-table td:first-child {
        background: var(--surface-subtle);
        font-weight: 700;
        text-align: left;
        align-items: flex-start;
        font-size: 1.1rem;
    }
    
    .data-table td:not(:first-child)::before {
        content: "";
        font-weight: 600;
        text-align: left;
        color: var(--color-text-secondary);
        font-size: 0.85rem;
        margin-bottom: 0.25rem;
        display: block;
        align-self: flex-start;
    }
    
    .data-table td:nth-child(2)::before {
        content: "Perusennuste";
    }
    
    .data-table td:nth-child(3)::before {
        content: "Interventioskenaario";
    }
    
    .data-table td:nth-child(4)::before {
        content: "Arvioitu muutos";
    }
}

/* Tooltip styles */
.info-tooltip-btn {
    background: none;
    border: none;
    color: var(--color-brand);
    cursor: pointer;
    font-size: 1rem;
    padding: 0 0.25rem;
    display: inline-flex;
    align-items: center;
    border-radius: 50%;
}
.info-tooltip-btn:hover {
    color: var(--color-primary-hover);
}
.info-tooltip-content {
    display: none;
    position: absolute;
    z-index: 100;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    padding: 1rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: normal;
    color: var(--color-text);
    width: max-content;
    max-width: 300px;
    margin-top: 0.5rem;
}
.info-tooltip-content.active {
    display: block;
}
.tooltip-container {
    position: relative;
    display: inline-block;
}

/* Formula Registry Styles */
.formula-card {
    background: var(--color-surface);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.1rem 1.25rem;
}

.formula-card__header {
    display: flex;
    align-items: baseline;
    gap: .6rem;
    margin-bottom: .6rem;
}

.formula-card__number {
    font-weight: 700;
    color: var(--primary-color);
    font-variant-numeric: tabular-nums;
    min-width: 1.4rem;
}

.formula-card__title {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
}

.formula-card__math {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: .6rem .8rem;
    overflow-x: auto;
    margin-bottom: .6rem;
}

.formula-card__math math {
    font-size: 1.02rem;
}

.formula-legend {
    margin: 0 0 .7rem;
    padding: .6rem .8rem;
    background: var(--bg-color);
    border-left: 3px solid var(--primary-color);
    border-radius: 0 6px 6px 0;
    font-size: .85rem;
}

.formula-legend__label {
    font-weight: 600;
    display: block;
    margin-bottom: .35rem;
    color: var(--text-color);
}

.formula-legend dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: .15rem 1rem;
    margin: 0;
}

.formula-legend dt {
    font-family: "Cambria Math", Cambria, "STIX Two Math", serif;
    font-style: italic;
    white-space: nowrap;
    color: var(--text-color);
}

.formula-legend dd {
    margin: 0;
    color: var(--color-text-secondary);
}

.formula-card__notes {
    margin: 0 0 .7rem;
    padding-left: 1.1rem;
    font-size: .85rem;
    color: var(--color-text-secondary);
}

.formula-card__notes li + li {
    margin-top: .25rem;
}

.formula-card__footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem;
    padding-top: .6rem;
    border-top: 1px dashed var(--border-color);
    font-size: .82rem;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .15rem .55rem;
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 600;
    white-space: nowrap;
}

.status-badge--reproduced {
    background: #e6f4ea;
    color: #0f7a3a;
}

.status-badge--extension {
    background: #e8f0fb;
    color: #1a5fb4;
}

.status-badge--assumption {
    background: #fbf0dc;
    color: #8a5a00;
}

.formula-card__sources {
    color: var(--color-text-secondary);
}

.formula-card__sources a {
    color: var(--primary-color);
    text-decoration: none;
}

.formula-card__sources a:hover {
    text-decoration: underline;
}

.formula-card__locator {
    font-style: italic;
}

.formula-card__unverified {
    color: #8a5a00;
    font-weight: 600;
}