:root {
    --color-bg: #FDFBF7;
    --color-ink: #264653;
    --color-teal: #2A9D8F;
    --color-mustard: #E9C46A;
    --color-orange: #E76F51;
    --color-paper: #FFFDF9;
    --font-header: 'DM Sans', sans-serif;
    --font-mono: 'Courier Prime', monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-header);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
    background-image: radial-gradient(#E5E5E5 1px, transparent 1px);
    background-size: 20px 20px;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
}

header {
    padding-bottom: 1rem;
    border-bottom: 4px solid var(--color-ink);
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -1px;
    color: var(--color-ink);
    line-height: 1;
}

header p {
    color: var(--color-teal);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.5rem;
}

main {
    display: flex;
    gap: 2rem;
    flex: 1;
    overflow: hidden;
}

.workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.results {
    width: 450px;
    display: flex;
    flex-direction: column;
}

.toolbar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

/* Retro Button Styles */
.btn {
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--color-ink);
    box-shadow: 3px 3px 0px 0px var(--color-ink);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.1s;
    font-family: var(--font-header);
    font-size: 0.85rem;
    background-color: white;
    color: var(--color-ink);
    transform: translate(0, 0);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0px 0px var(--color-ink);
}

.btn:active {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px 0px var(--color-ink);
}

.btn.primary {
    background-color: var(--color-mustard);
}

.btn.accent {
    background-color: var(--color-orange);
    color: white;
}

.btn.secondary {
    background-color: white;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

#variables-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding-right: 0.5rem;
    padding-bottom: 1rem;
}

/* Variable Card - Retro File Folder Look */
.variable-card {
    background-color: var(--color-paper);
    border: 2px solid var(--color-ink);
    box-shadow: 4px 4px 0px 0px var(--color-ink);
    /* Hard shadow */
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
}

.variable-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background-color: var(--color-teal);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-left: 1rem;
}

.variable-name-input {
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--color-ink);
    color: var(--color-ink);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    width: 100%;
    padding: 0.25rem;
    border-radius: 0;
}

.variable-name-input:focus {
    outline: none;
    background-color: rgba(42, 157, 143, 0.1);
}

.remove-btn {
    background: transparent;
    border: none;
    color: var(--color-orange);
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0 0.5rem;
    font-weight: bold;
    line-height: 1;
}

.card-body {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding-left: 1rem;
}

.type-select {
    background-color: #F0EFEB;
    color: var(--color-ink);
    border: 2px solid var(--color-ink);
    padding: 0.5rem;
    border-radius: 0;
    min-width: 140px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    box-shadow: 2px 2px 0px 0px rgba(0, 0, 0, 0.1);
}

.params-container {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.param-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.param-group label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-ink);
    opacity: 0.7;
}

.param-input {
    background-color: white;
    border: 2px solid var(--color-ink);
    color: var(--color-ink);
    padding: 0.5rem;
    border-radius: 0;
    width: 100px;
    font-family: var(--font-mono);
    font-weight: bold;
    font-size: 0.9rem;
}

.param-input:focus {
    outline: none;
    border-color: var(--color-teal);
}

/* Results Card */
.results-card {
    background-color: var(--color-paper);
    border: 2px solid var(--color-ink);
    box-shadow: 6px 6px 0px 0px var(--color-ink);
    padding: 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-y: auto;
    /* Add scrollbar if content overflows */
}

.results-card h2 {
    font-size: 1.2rem;
    font-weight: 900;
    text-transform: uppercase;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px dashed var(--color-ink);
    flex-shrink: 0;
}

.chart-container {
    position: relative;
    height: 250px;
    /* Fixed height for consistency */
    width: 100%;
    margin-bottom: 1rem;
    border: 2px solid var(--color-ink);
    background-color: white;
    padding: 0.5rem;
}

#results-chart {
    width: 100% !important;
    height: 100% !important;
}

#stats-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.stat-box {
    background-color: #F0EFEB;
    padding: 0.5rem;
    /* Reduced padding */
    border: 2px solid var(--color-ink);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
}

.stat-box:nth-child(3) {
    /* 90% CI box */
    grid-column: span 2;
    /* Stretch across */
    background-color: #E0F2F1;
    border-color: var(--color-teal);
    box-shadow: 3px 3px 0px 0px var(--color-teal);
}

/* Remove previous specific styling for 2nd child if it exists */


.stat-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-ink);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-ink);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
    border-left: 2px solid var(--color-ink);
}

::-webkit-scrollbar-thumb {
    background: var(--color-ink);
    border: 2px solid var(--color-bg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-teal);
}

/* Mobile Responsiveness */
@media (max-width: 1024px) {
    body {
        overflow: auto;
        /* Allow scrolling on mobile */
        height: auto;
    }

    .app-container {
        padding: 1rem;
        height: auto;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    main {
        flex-direction: column;
        overflow: visible;
    }

    .workspace {
        overflow: visible;
    }

    #variables-container {
        overflow: visible;
    }

    .results {
        width: 100%;
    }

    .card-body {
        flex-direction: column;
        gap: 1rem;
        padding-left: 0;
    }

    .card-header {
        padding-left: 0;
    }

    .type-select {
        width: 100%;
    }

    .params-container {
        width: 100%;
    }

    .param-group {
        flex: 1;
        min-width: 100px;
    }

    .param-input {
        width: 100%;
    }

    .results-card {
        height: auto;
        overflow: visible;
    }

    #stats-container {
        grid-template-columns: 1fr;
    }

    .stat-box:nth-child(3) {
        grid-column: auto;
    }
}

/* Beta Badge */
.beta-badge {
    position: absolute;
    top: 0;
    left: 0;
    border: 2px solid var(--color-ink);
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background-color: var(--color-orange);
    color: white;
    transform: rotate(-6deg);
    line-height: 1rem;
}

/* Footer */
.app-footer {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--color-ink);
    opacity: 0.5;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

/* Driver.js Overrides for Retro Look */
.driver-popover {
    background-color: var(--color-paper) !important;
    border: 2px solid var(--color-ink) !important;
    box-shadow: 6px 6px 0px 0px var(--color-ink) !important;
    border-radius: 0 !important;
    color: var(--color-ink) !important;
    padding: 1.5rem !important;
    max-width: 350px !important;
}

.driver-popover-title {
    font-family: var(--font-header) !important;
    font-weight: 900 !important;
    font-size: 1.2rem !important;
    text-transform: uppercase !important;
    letter-spacing: 1px !important;
    margin-bottom: 0.5rem !important;
    color: var(--color-ink) !important;
}

.driver-popover-description {
    font-family: var(--font-mono) !important;
    font-size: 0.9rem !important;
    line-height: 1.5 !important;
    color: var(--color-ink) !important;
    margin-bottom: 1.5rem !important;
}

.driver-popover-footer {
    margin-top: 0 !important;
}

.driver-popover-footer button {
    background-color: white !important;
    border: 2px solid var(--color-ink) !important;
    box-shadow: 3px 3px 0px 0px var(--color-ink) !important;
    color: var(--color-ink) !important;
    font-family: var(--font-header) !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 1px !important;
    padding: 0.5rem 1rem !important;
    border-radius: 0 !important;
    text-shadow: none !important;
    transition: all 0.1s !important;
}

.driver-popover-footer button:hover {
    background-color: var(--color-mustard) !important;
    transform: translate(-1px, -1px) !important;
    box-shadow: 4px 4px 0px 0px var(--color-ink) !important;
}

.driver-popover-footer button:active {
    transform: translate(2px, 2px) !important;
    box-shadow: 0px 0px 0px 0px var(--color-ink) !important;
}

.driver-popover-close-btn {
    color: var(--color-ink) !important;
    opacity: 0.5 !important;
    transition: opacity 0.2s !important;
}

.driver-popover-close-btn:hover {
    opacity: 1 !important;
    color: var(--color-orange) !important;
}

.driver-popover-arrow-side-left.driver-popover-arrow {
    border-right-color: var(--color-ink) !important;
}

.driver-popover-arrow-side-right.driver-popover-arrow {
    border-left-color: var(--color-ink) !important;
}

.driver-popover-arrow-side-top.driver-popover-arrow {
    border-bottom-color: var(--color-ink) !important;
}

.driver-popover-arrow-side-bottom.driver-popover-arrow {
    border-top-color: var(--color-ink) !important;
}