:root {
    --primary-color: #A31C2E;
    --primary-color-dark: #7c1523;
    --secondary-color: #CA9295;
    --text-color: #494949;
    --accent-color: #C67583;
    --light-bg: #F5F4F4;
    --results-bg: #F9F8F8;
    --border-color: #E0E0E0;
    --muted-text-color: #727272;
    --warning-bg: #fffbe6;
    --warning-border: #ffe58f;
    --font-primary: "Arvo", serif;
    --font-text: "Open Sans", sans-serif;
    --font-accent: "Ubuntu Condensed", sans-serif;
}

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

html {
    height: 100%;
}

body {
    background-color: var(--light-bg);
    color: var(--text-color);
    font-family: var(--font-text);
    line-height: 1.6;
    margin: 0;
    min-height: 100vh;
}

body.modal-is-open {
    overflow: hidden;
}

.app-wrapper {
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.container {
    background: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.07);
    overflow: hidden;
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.header-title {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-logo {
    height: 40px;
    width: auto;
    flex-shrink: 0;
}

.header-title-text h2 {
    margin: 0;
    line-height: 1.2;
    color: var(--primary-color);
    font-family: var(--font-primary);
    font-size: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-family: var(--font-primary);
}

.results-details {
    padding: 1.5rem;
    background-color: var(--results-bg);
}

.accordion-group {
    border-bottom: 1px solid var(--border-color);
}

.accordion-group:last-of-type {
    border-bottom: none;
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    cursor: pointer;
    background-color: #fff;
}

.accordion-header h4 {
    margin: 0;
    font-family: var(--font-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 1rem;
    color: var(--text-color);
}

.accordion-arrow {
    font-size: 1.5rem;
    color: var(--accent-color);
    transition: transform 0.3s ease;
}

.accordion-group.is-open .accordion-arrow {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: #fff;
}

.accordion-content-inner {
    padding: 1.5rem;
}

.accordion-group.is-open .accordion-content {
    max-height: 600px;
}

.form-group {
    margin-bottom: 2.5rem;
}

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

.form-group-split {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1rem;
    margin-bottom: 0;
}

.form-group-split .form-group {
    flex-grow: 1;
    margin-bottom: 0;
}

.form-group-split .unit-switcher {
    flex-shrink: 0;
    margin-bottom: 0;
}

label {
    display: block;
    margin-bottom: .5rem;
    font-weight: 600;
    color: var(--muted-text-color);
    font-size: 0.9rem;
}

input[type="number"] {
    width: 100%;
    padding: .75rem;
    border: 1px solid var(--border-color);
    background-color: white;
    color: var(--text-color);
    border-radius: 5px;
    font-size: 1rem;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--light-bg);
    border-radius: 5px;
    outline: none;
    margin-top: 0.75rem;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:active {
    transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform 0.1s;
}

.unit-switcher-wrapper {
    padding: 1.5rem;
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
}

.unit-switcher {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.unit-switcher button {
    flex: 1;
    padding: 0.8rem 1rem;
    border: none;
    background: white;
    color: var(--muted-text-color);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.unit-switcher button.active {
    background: var(--primary-color);
    color: white;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.legend-swatch {
    width: 15px;
    height: 15px;
    border-radius: 3px;
}

.bar-chart-container {
    margin-bottom: 1.75rem;
}

.bar-chart-title {
    font-family: var(--font-text);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--muted-text-color);
    margin-bottom: 0.75rem;
}

.bar-chart-group {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.5rem;
}

.bar-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--muted-text-color);
}

.bar-container-wrapper {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 1rem;
}

.bar-value {
    font-weight: 700;
    color: var(--text-color);
    font-family: var(--font-primary);
}

.bar-container {
    width: 100%;
    background: var(--light-bg);
    border-radius: 15px;
    overflow: hidden;
}

.bar {
    height: 20px;
    border-radius: 15px;
    transition: width 0.5s ease-in-out;
}

.bar.fps {
    background-color: var(--text-color);
}

.bar.dbt {
    background: var(--accent-color);
}

.actions-footer {
    text-align: center;
    margin-top: 2.5rem;
}

.cta-button {
    display: block;
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: none;
    font-family: var(--font-accent);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    text-decoration: none;
    margin-bottom: 1rem;
    cursor: pointer;
    font-size: 1rem;
}

#share-btn {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

#show-formulas {
    color: var(--muted-text-color);
    font-family: var(--font-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    display: inline-block;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    transition: background-color 0.2s, border-color 0.2s;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.is-visible {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    max-width: 600px;
    width: 100%;
    margin: auto;
    max-height: 85vh;
    overflow-y: auto;
}

.modal-content h4 {
    margin-top: 0;
    font-size: 1.25rem;
}

.modal-content .formula {
    background-color: var(--light-bg);
    padding: 1rem;
    border-radius: 5px;
    margin: 0.5rem 0 1.5rem 0;
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--text-color);
    word-wrap: break-word;
}

.modal-close {
    float: right;
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    color: var(--muted-text-color);
}

.tooltip-container {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.tooltip-icon {
    margin-left: 8px;
    cursor: help;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    background-color: var(--muted-text-color);
    color: white;
    font-size: 12px;
    font-weight: bold;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    user-select: none;
}

.tooltip-text {
    visibility: hidden;
    width: 280px;
    background-color: var(--text-color);
    color: #fff;
    text-align: left;
    border-radius: 6px;
    padding: 10px;
    position: fixed;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.85rem;
    font-weight: normal;
    line-height: 1.5;
    pointer-events: none;
}

.tooltip-text.is-visible {
    visibility: visible;
    opacity: 1;
}

.tooltip-text code {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.speed-explanation {
    margin-top: -1rem;
    margin-bottom: 1.5rem;
    padding: 0.75rem;
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-color);
}

.info-note {
    font-size: 0.85rem;
    color: var(--muted-text-color);
    margin-top: 0.25rem;
    margin-bottom: 1.5rem;
    text-align: center;
    user-select: none;
}

@keyframes flash {
    0% {
        background-color: transparent;
    }

    25% {
        background-color: var(--warning-bg);
        border-color: var(--warning-border);
    }

    75% {
        background-color: var(--warning-bg);
        border-color: var(--warning-border);
    }

    100% {
        background-color: transparent;
    }
}

#show-formulas.is-flashing {
    animation: flash 1.5s ease-in-out;
    border: 1px solid transparent;
    border-radius: 5px;
    padding: 2px 5px;
}

@media (min-width: 992px) {
    .container {
        display: grid;
        grid-template-columns: 40% 60%;
        grid-template-rows: auto 1fr;
        grid-template-areas: "header header" "inputs results_details";
        align-items: start;
    }

    .header {
        grid-area: header;
    }

    .input-section {
        grid-area: inputs;
        border-right: 1px solid var(--border-color);
    }

    .results-details {
        grid-area: results_details;
        border-bottom-right-radius: 12px;
    }

    .accordion-header {
        cursor: default;
        pointer-events: none;
    }

    .accordion-arrow {
        display: none;
    }

    .accordion-content,
    .accordion-group.is-open .accordion-content {
        max-height: none;
        overflow: visible;
    }
}