:root {
    --ink: #24122f;
    --plum: #451952;
    --berry: #9f4460;
    --rose: #f2a7b8;
    --peach: #f5c68c;
    --cream: #fff8ed;
    --mist: #e8f4ef;
    --glass: rgba(255, 248, 237, 0.82);
    --glass-strong: rgba(255, 248, 237, 0.94);
    --shadow: 0 24px 70px rgba(21, 8, 31, 0.34);
    --soft-shadow: 0 12px 32px rgba(36, 18, 47, 0.22);
    --radius: 20px;
}

/* background */
body {
    position: relative;
    isolation: isolate;
    min-height: 100vh;
    overflow-x: hidden;
    padding: 24px;
    color: var(--ink);
    background:
        radial-gradient(circle at 16% 18%, rgba(242, 167, 184, 0.42), transparent 30%),
        radial-gradient(circle at 82% 12%, rgba(245, 198, 140, 0.28), transparent 25%),
        radial-gradient(circle at 70% 88%, rgba(232, 244, 239, 0.22), transparent 30%),
        linear-gradient(145deg, #160821 0%, #321040 48%, #662549 100%);
    font-family: "Outfit", system-ui, sans-serif;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
}

body::before {
    z-index: 0;
    background:
        radial-gradient(circle, rgba(255, 255, 255, 0.95) 0 1px, transparent 1.5px) 12px 18px / 120px 120px,
        radial-gradient(circle, rgba(255, 231, 181, 0.82) 0 1px, transparent 1.5px) 68px 44px / 150px 150px,
        radial-gradient(circle, rgba(255, 255, 255, 0.72) 0 1.2px, transparent 1.7px) 28px 92px / 190px 190px;
}

body::after {
    z-index: 0;
    background:
        radial-gradient(circle at 18% 32%, rgba(255, 255, 255, 0.52) 0 1px, transparent 2px),
        radial-gradient(circle at 42% 18%, rgba(255, 231, 181, 0.45) 0 1px, transparent 2px),
        radial-gradient(circle at 72% 38%, rgba(255, 255, 255, 0.58) 0 1px, transparent 2px),
        radial-gradient(circle at 86% 72%, rgba(255, 231, 181, 0.48) 0 1px, transparent 2px),
        radial-gradient(circle at 30% 78%, rgba(255, 255, 255, 0.5) 0 1px, transparent 2px);
}

body > * {
    position: relative;
    z-index: 1;
}

/* game board layout */
#game_header {
    color: var(--cream);
    font-family: "Fraunces", serif;
    font-size: clamp(2.75rem, 7vw, 5.75rem);
    font-weight: 550;
    line-height: 0.95;
    text-align: center;
    text-shadow: 0 12px 34px rgba(0, 0, 0, 0.28);
}

#game_board {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 18px;
    width: min(100%, 1120px);
    min-height: 660px;
    margin: 24px auto 0;
}

#selection_board {
    padding: 14px;
    border: 1px solid rgba(255, 248, 237, 0.5);
    border-radius: var(--radius);
    background: rgba(255, 248, 237, 0.26);
    box-shadow: var(--soft-shadow);
    backdrop-filter: blur(16px);
}

#canvas_panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    border: 1px solid rgba(255, 248, 237, 0.56);
    border-radius: 28px;
    background:
        linear-gradient(180deg, rgba(255, 248, 237, 0.38), rgba(255, 248, 237, 0.18)),
        rgba(255, 255, 255, 0.12);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

#canvas {
    width: min(400px, 74vw);
    height: auto;
    border: 10px solid var(--glass-strong);
    border-radius: 18px;
    box-shadow:
        0 18px 50px rgba(21, 8, 31, 0.4),
        inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

#game_board #tabs {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#action_bar {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    width: 100%;
    margin-top: 14px;
    color: var(--cream);
}

#action_bar label,
#action_bar button {
    font-family: "Outfit", system-ui, sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

#canvas_color {
    width: 44px;
    height: 36px;
    padding: 0;
    border: 2px solid rgba(255, 248, 237, 0.86);
    border-radius: 999px;
    background: transparent;
    box-shadow: 0 8px 20px rgba(21, 8, 31, 0.22);
    cursor: pointer;
}

#action_bar button {
    min-width: 76px;
    padding: 9px 16px;
    border: 1px solid rgba(255, 248, 237, 0.5);
    border-radius: 999px;
    color: var(--cream);
    background: rgba(255, 248, 237, 0.16);
    box-shadow: 0 8px 20px rgba(21, 8, 31, 0.2);
    transition: transform 160ms ease, background-color 160ms ease;
}

#action_bar button:hover,
#action_bar button:focus-visible {
    background: rgba(255, 248, 237, 0.28);
    transform: translateY(-1px);
}

.tab {
    width: 142px;
    padding: 12px 18px;
    border-radius: 999px;
    color: var(--cream);
    font-family: "Outfit", system-ui, sans-serif;
    font-size: 1rem;
    font-weight: 750;
    text-align: center;
    background: rgba(255, 248, 237, 0.12);
    transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}

.tab:hover,
.tab:focus-visible {
    color: var(--ink);
    background: var(--cream);
    transform: translateX(2px);
}

.tab.active {
    color: var(--ink);
    background: linear-gradient(135deg, var(--peach), var(--rose));
    box-shadow: 0 10px 28px rgba(21, 8, 31, 0.22);
}

#thumbnail_board {
    height: 600px;
    width: 348px;
    padding: 16px;
    border: 1px solid rgba(255, 248, 237, 0.5);
    border-radius: var(--radius);
    background: var(--glass);
    box-shadow: var(--soft-shadow);
    backdrop-filter: blur(18px);
    overflow-y: auto;
    scrollbar-color: var(--berry) rgba(255, 248, 237, 0.45);
}

#sub-tabs {
    position: sticky;
    top: 0;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-bottom: 12px;
    background: transparent;
}

#thumbnails {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.subtab {
    padding: 8px 12px;
    border-radius: 999px;
    color: var(--ink);
    font-family: "Outfit", system-ui, sans-serif;
    font-size: 0.88rem;
    font-weight: 700;
    text-transform: capitalize;
    background: rgba(69, 25, 82, 0.08);
    transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.subtab:hover,
.subtab:focus-visible,
.subtab.active {
    color: var(--cream);
    background: var(--plum);
    transform: translateY(-1px);
}

.thumbnail {
    width: 92px;
    height: 92px;
    padding: 8px;
    border: 1px solid rgba(69, 25, 82, 0.12);
    border-radius: 16px;
    object-fit: contain;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(255, 248, 237, 0.76));
    box-shadow: 0 8px 18px rgba(36, 18, 47, 0.12);
    cursor: pointer;
    transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.thumbnail:hover,
.thumbnail:focus-visible {
    border-color: rgba(159, 68, 96, 0.6);
    box-shadow: 0 12px 24px rgba(36, 18, 47, 0.18);
    transform: translateY(-2px) scale(1.02);
}

.clear-thumbnail {
    display: grid;
    place-items: center;
    color: var(--berry);
    font-size: 1.55rem;
    font-weight: 800;
}

.skin-swatch,
.hair-color-swatch {
    border: 4px solid rgba(255, 255, 255, 0.78);
    background-image: none;
}

#asset_credit {
    max-width: 1120px;
    margin: 20px auto 0;
    color: rgba(255, 248, 237, 0.78);
    font-family: "Outfit", system-ui, sans-serif;
    font-size: 0.9rem;
    text-align: center;
}

#asset_credit a {
    color: var(--peach);
    font-weight: 700;
    text-decoration-color: rgba(245, 198, 140, 0.55);
    text-underline-offset: 3px;
}

#asset_credit a:hover,
#asset_credit a:focus-visible {
    color: var(--cream);
}

@media (max-width: 1100px) {
    body {
        padding: 18px 12px 28px;
    }

    #game_board {
        flex-wrap: wrap;
        min-height: 0;
        gap: 14px;
    }

    #canvas_panel {
        order: 1;
    }

    #selection_board {
        order: 2;
        width: min(100%, 468px);
        height: auto;
    }

    #game_board #tabs {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .tab {
        width: auto;
        min-width: 92px;
    }

    #thumbnail_board {
        order: 3;
        width: min(100%, 468px);
        height: 360px;
    }
}

@media (max-width: 640px) {
    #game_header {
        font-size: 2.7rem;
    }

    #game_board {
        margin-top: 18px;
    }

    #canvas_panel {
        width: 100%;
        padding: 10px;
    }

    #canvas {
        width: min(100%, 390px);
        border-width: 8px;
    }

    #selection_board,
    #thumbnail_board {
        width: 100%;
    }

    #game_board #tabs {
        justify-content: center;
        gap: 8px;
    }

    .tab {
        min-width: 82px;
        padding: 10px 12px;
        font-size: 0.92rem;
    }

    #thumbnail_board {
        height: 330px;
    }

    #thumbnails {
        grid-template-columns: repeat(3, 1fr);
    }

    .thumbnail {
        width: 100%;
        height: auto;
        aspect-ratio: 1;
    }
}