* {
    box-sizing: border-box;
}

:root {
    --nav-height: 66px;
    --body-bg: #101010;
    --panel-bg: #181818;
    --panel-bg-2: #141414;
    --panel-border: #2a2a2a;
    --accent: #74c7ff;
    --divider: #3a3a3a;
    --divider-hover: #74c7ff;
    --script-width: 28%;
}

html,
body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--body-bg);
    color: #ffffff;
    font-family: Arial, Helvetica, sans-serif;
}

body.dragging {
    cursor: col-resize;
    user-select: none;
}

#workspace {
    width: 100vw;
    height: calc(100dvh - var(--nav-height));
    display: flex;
    flex-direction: row;
    overflow: hidden;
    background: var(--body-bg);
}

.pane {
    min-height: 0;
    overflow: hidden;
}

.slide-pane {
    flex: 1 1 auto;
    min-width: 360px;
    height: 100%;
    min-height: 0;
    padding: 8px 6px 8px 10px;
    display: flex;
    flex-direction: column;
    background: var(--body-bg);
    overflow: hidden;
}

.script-pane {
    flex: 0 0 var(--script-width);
    min-width: 270px;
    max-width: 58vw;
    height: 100%;
    min-height: 0;
    padding: 8px 10px 8px 6px;
    background: var(--body-bg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#resizer {
    flex: 0 0 8px;
    width: 8px;
    height: 100%;
    cursor: col-resize;
    background: var(--divider);
    border-left: 1px solid #202020;
    border-right: 1px solid #202020;
    transition: background 0.12s ease;
}

#resizer:hover,
body.dragging #resizer {
    background: var(--divider-hover);
}

.pane-header {
    flex: 0 0 auto;
    min-height: 24px;
    padding: 0 2px 5px 2px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    color: #b8dfff;
    font-size: 12px;
    line-height: 1.25;
}

#status {
    text-align: right;
    color: #8fd3ff;
    white-space: nowrap;
}

.slide-frame {
    position: relative;
    flex: 1 1 0;
    min-height: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    overflow: hidden;
}

#slideImage {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.image-fallback {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffb4b4;
    font-size: 15px;
}

.script-inner {
    width: 100%;
    height: 100%;
    min-height: 0;
    max-height: 100%;
    padding: 14px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 10px;

    display: grid;
    grid-template-rows: auto minmax(0, 1fr);

    overflow: hidden;
}

.slide-title {
    flex: 0 0 auto;
    margin: 0 0 9px 0;
    color: var(--accent);
    font-size: clamp(12px, 1vw, 14px);
    line-height: 1.35;
    font-weight: 400;
}

.slide-script {
    min-height: 0;
    height: 100%;
    margin: 0;
    color: #eeeeee;
    font-size: clamp(13px, 1.05vw, 15px);
    line-height: 1.55;
    font-weight: 400;
    white-space: pre-wrap;

    overflow-y: auto;
    overflow-x: hidden;

    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;

    padding-right: 8px;
}
.slide-script::-webkit-scrollbar {
    width: 8px;
}

.slide-script::-webkit-scrollbar-track {
    background: #1b1b1b;
}

.slide-script::-webkit-scrollbar-thumb {
    background: #666;
    border-radius: 4px;
}

.slide-script::-webkit-scrollbar-thumb:hover {
    background: #888;
}

.bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    height: var(--nav-height);
    padding: 7px 8px calc(7px + env(safe-area-inset-bottom)) 8px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 7px;
    background: #1d1d1d;
    border-top: 1px solid #333333;
    z-index: 1000;
}

.nav-btn {
    width: 100%;
    min-width: 0;
    border: none;
    border-radius: 9px;
    padding: 8px 5px;
    background: #efefef;
    color: #111111;
    font-size: 13px;
    line-height: 1.15;
    cursor: pointer;
}

.nav-btn.primary {
    background: var(--accent);
    color: #06121a;
}

.nav-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

@media (min-width: 1200px) {
    :root {
        --script-width: 30%;
    }

    .slide-script {
        font-size: clamp(13px, 0.95vw, 15px);
        line-height: 1.5;
    }
}

@media (min-width: 1600px) {
    :root {
        --script-width: 28%;
    }

    .slide-script {
        font-size: 15px;
        line-height: 1.5;
    }
}

@media (max-width: 900px) {
    :root {
        --nav-height: 64px;
    }

    body.dragging {
        cursor: default;
    }

    #workspace {
        flex-direction: column;
    }

    .slide-pane {
        order: 1;
        width: 100% !important;
        flex: 1 1 0;
        min-width: 0;
        height: auto;
        min-height: 0;
        padding: 6px 6px 4px 6px;
        overflow: hidden;
    }

    #resizer {
        display: none;
    }

    .script-pane {
        order: 2;
        width: 100% !important;
        flex: 0 0 clamp(120px, 30dvh, 210px);
        min-width: 0;
        max-width: none;
        height: auto;
        min-height: 0;
        padding: 4px 6px 6px 6px;
        overflow: hidden;
    }

    .script-inner {
        height: 100%;
        min-height: 0;
        max-height: 100%;
        padding: 8px 10px;
        border-radius: 8px;
        overflow: hidden;
    }

    .slide-frame {
        flex: 1 1 0;
        min-height: 0;
        border-radius: 8px;
    }

    .slide-title {
        font-size: 12px;
        margin-bottom: 5px;
    }

    .slide-script {
        min-height: 0;
        height: 100%;
        font-size: 14px;
        line-height: 1.42;
    
        overflow-y: auto;
        overflow-x: hidden;
        -webkit-overflow-scrolling: touch;
    }

    .bottom-nav {
        gap: 5px;
        padding-left: 6px;
        padding-right: 6px;
    }

    .nav-btn {
        font-size: 12px;
        padding: 8px 4px;
    }
}

@media (orientation: landscape) and (max-height: 520px) {
    :root {
        --nav-height: 54px;
    }

    .pane-header {
        min-height: 20px;
        font-size: 11px;
        padding-bottom: 3px;
    }

    .script-pane {
        flex-basis: clamp(82px, 32dvh, 120px);
        padding: 3px 6px 5px 6px;
        overflow: hidden;
    }

    .script-inner {
        height: 100%;
        min-height: 0;
        max-height: 100%;
        padding: 5px 8px;
        overflow: hidden;
    }

    .slide-title {
        font-size: 11px;
        margin-bottom: 2px;
    }

    .slide-script {
        min-height: 0;
        height: 100%;
        font-size: 12px;
        line-height: 1.32;
        overflow-y: auto;
        overflow-x: hidden;
    }

    .bottom-nav {
        height: var(--nav-height);
        padding-top: 5px;
        padding-bottom: calc(5px + env(safe-area-inset-bottom));
    }
}