.container {
    width: 92%;
    max-width: 900px;
    margin: 36px auto;
    background: var(--card);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .06);
    padding: 24px 26px 32px;
}

@media (max-width: 640px) {
    .container {
        width: 100%;
        margin: 0;
        border-radius: 0;
        padding: 20px 16px 80px;
        min-height: 100vh;
        box-shadow: none;
    }
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

@media (max-width: 640px) {
    .header {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
        text-align: center;
    }
}

.header h1 {
    margin: 4px 0 16px;
    font-size: 28px;
    font-family: Caveat, "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

@media (max-width: 640px) {
    .header h1 {
        order: -1;
        margin-bottom: 4px;
    }
}

.logo {
    filter: drop-shadow(0 2px 0 rgba(0, 0, 0, .08));
}

#settingsBtn {
    /* Ensure it's positioned correctly on mobile if needed, though flex order might handle it or absolute positioning */
}

@media (max-width: 640px) {
    #settingsBtn {
        position: absolute;
        top: 20px;
        right: 16px;
    }
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

@media (max-width: 640px) {
    .header-actions {
        justify-content: center;
        width: 100%;
        flex-wrap: wrap;
    }
}

.tabs {
    display: flex;
    gap: 8px;
    margin: 0 0 12px;
    border-bottom: 1px dashed #e5e7eb;
}

.tab {
    background: transparent;
    color: var(--fg);
    padding: 10px 12px;
    border-radius: 10px 10px 0 0;
}

.tab.active {
    background: var(--card);
    box-shadow: inset 0 -2px 0 var(--primary);
    font-weight: 600;
}

[data-theme="dark"] .tabs {
    border-color: #1f2937;
}

.retro-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin: 8px 0 16px;
}

.retro-type {
    display: flex;
    gap: 8px;
}

.retro-section {
    margin: 16px 0;
}

.charts-grid {
    display: grid;
    gap: 12px;
    align-items: start;
    grid-template-columns: repeat(2, minmax(280px, 1fr));
}

.charts-grid.two {
    grid-template-columns: repeat(2, minmax(280px, 1fr));
}

.charts-grid.three {
    grid-template-columns: repeat(3, minmax(220px, 1fr));
}

.card.span-2 {
    grid-column: span 2;
}

@media (max-width: 740px) {

    .charts-grid.two,
    .charts-grid.three {
        grid-template-columns: 1fr;
    }

    .card.span-2 {
        grid-column: auto;
    }
}