/* Estilos gerais */
:root {
    --color-primary: #2563eb;
    --color-accent: #10b981;
    --color-muted: #6b7280;
    --bg: #f5f7fb;
    --surface: #ffffff;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
}
html {
    font-size: 62.5%;
}
body {
    margin: 0;
    font-family: "Inter", Segoe UI, Roboto, sans-serif;
    background: var(--bg);
    color: #111827;
}

header {
    background-color: var(--color-primary);
    padding: 20px;
    color: white;

    h1 {
        font-size: 3rem;
        text-align: center;
    }

    a {
        height: 80px;
        width: 80px;
        font-size: 4rem;
        position: fixed;
        top: 18px;
        display: grid;
        place-content: center;
        line-height: 4rem;
        text-decoration: none;
    }

    .glow-on-hover {
        border: none;
        outline: none;
        color: #fff;
        background: #111;
        cursor: pointer;
        z-index: 0;
        border-radius: 10px;
    }

    .glow-on-hover:before {
        content: "";
        background: linear-gradient(
            45deg,
            #ff0000,
            #ff7300,
            #fffb00,
            #48ff00,
            #00ffd5,
            #002bff,
            #7a00ff,
            #ff00c8,
            #ff0000
        );
        position: absolute;
        top: -2px;
        left: -2px;
        background-size: 400%;
        z-index: -1;
        filter: blur(5px);
        width: calc(100% + 4px);
        height: calc(100% + 4px);
        animation: glowing 20s linear infinite;
        opacity: 0;
        transition: opacity 0.3s ease-in-out;
        border-radius: 10px;
    }

    .glow-on-hover:active {
        color: #000;
    }

    .glow-on-hover:active:after {
        background: transparent;
    }

    .glow-on-hover:hover:before {
        opacity: 1;
    }

    .glow-on-hover:after {
        z-index: -1;
        content: "";
        position: absolute;
        width: 100%;
        height: 100%;
        background: #111;
        left: 0;
        top: 0;
        border-radius: 10px;
    }

    @keyframes glowing {
        0% {
            background-position: 0 0;
        }
        50% {
            background-position: 400% 0;
        }
        100% {
            background-position: 0 0;
        }
    }
}

main {
    padding: 2rem 1rem 6rem;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background: var(--surface);
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 2rem;
    margin: 2rem auto;
}
.card h2 {
    margin-top: 0;
    font-size: 2rem;
}

.btn {
    background: var(--color-primary);
    color: #fff;
    border: 1px solid var(--color-primary);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
}
.btn:hover {
    filter: brightness(1.05);
}
.btn.small {
    padding: 0.4rem 0.8rem;
    font-size: 1.2rem;
}
.btn.outline {
    background: #fff;
    color: var(--color-primary);
}
.btn.outline:hover {
    background: #eef2ff;
}

/* ---- Demos interativos ---- */
.muted {
    color: var(--color-muted);
    margin: 0.2rem 0 1rem;
    font-size: 1.3rem;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(220px, 1fr));
    gap: 1.2rem;
    align-items: start;
}

fieldset {
    border: 1px dashed #e5e7eb;
    border-radius: 10px;
    padding: 0.8rem 1rem 1rem;
}
fieldset legend {
    font-weight: 600;
    color: #374151;
}
fieldset label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: 0.8rem;
    font-size: 1.2rem;
}

.control {
    display: grid;
    gap: 0.5rem;
}
.control label {
    font-size: 1.3rem;
    font-weight: 600;
    color: #374151;
}
.control input[type="range"] {
    width: 100%;
}
.control input[type="number"],
.control select,
.control input[type="text"] {
    padding: 0.4rem 0.6rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-family: inherit;
}

.control span {
    font-size: 1.2rem;
    color: var(--color-accent);
    font-weight: bold;
    text-align: center;
    margin-top: 5px;
}

.timing-extra {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-top: 0.6rem;
}
.timing-extra label {
    font-weight: 500;
}

.preview {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1.2rem;
}
.demo-row {
    display: flex;
    gap: 0.6rem;
    align-items: center;
}
.demo-area {
    min-height: 180px;
    display: grid;
    place-items: center;
    border: 1px dashed #e5e7eb;
    border-radius: 12px;
    padding: 1.2rem;
    background: #fafafa;
}
.box {
    width: 120px;
    height: 120px;
    background: #60a5fa;
    border-radius: 12px;
    box-shadow: 0 10px 18px rgba(0, 0, 0, 0.08);
    transition: background-color 0.4s ease, transform 0.4s ease, border-radius 0.4s ease, width 0.4s ease;
}
.box.circle {
    border-radius: 30%;
    width: 120px;
    height: 120px;
}

/* Estado alternado para a demo de transição */
#trans-box.active {
    background: #34d399;
    transform: translateX(80px) rotate(12deg) scale(1.1);
    border-radius: 28px;
    width: 160px;
}

.code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 1.2rem;
    background: #0b1020;
    color: #cbd5e1;
    padding: 1rem;
    border-radius: 10px;
    overflow: auto;
}

/* Keyframes demonstrativos */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.3);
        background: #f59e0b;
    }
    100% {
        transform: scale(1);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes slide {
    0% {
        transform: translateX(-250px);
        opacity: 0.5;
    }
    100% {
        transform: translateX(250px);
        opacity: 1;
    }
}

/* Util para mostrar quando transition-property: none ou transition: <keyword> */
.dim {
    opacity: 0.6;
}

/* Interpolate-size demo */
.text-box {
    width: min(680px, 100%);
    margin: 0.6rem auto 0;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 1rem 1.2rem;
    overflow: hidden;
    height: auto;
    transition: height 0.6s ease;
}
.text-box.collapsed {
    height: 60px;
}
.text-box.allow-keywords {
    interpolate-size: allow-keywords;
}

/* Transformações 3D */
#transform-stage {
    perspective: none; /* perspectiva aplicada no #transform-box para afetar diretamente as faces */
    perspective-origin: 50% 50%;
}

#transform-box {
    position: relative;
    /* perspective é aplicada aqui */
    overflow: visible;
    transform-origin: 50% 50%;
    perspective: 600px; /* padrão inicial */
    width: 200px;
    height: 200px;
}

#transform-object {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d; /* mantém 3D para filhos (cube + axes) */
}

#transform-box.wireframe {
    background: transparent;
}
#transform-box.wireframe { background: transparent; box-shadow: none; }

/* Wireframe 3D */
#transform-box .cube {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120px;
    height: 120px;
    transform-style: preserve-3d;
    opacity: 1;
    transform: translate(-50%, -50%);
}
#transform-box.wireframe {
    background: transparent;
    box-shadow: none;
}
#transform-box .cube .face {
    position: absolute;
    top: 0;
    left: 0;
    width: 120px;
    height: 120px;
    border: 2px dashed rgba(0, 0, 0, 0.5);
    background: rgba(255, 255, 255, 0.08);
    transform-origin: 50% 50%;
    backface-visibility: hidden;

    &.backfaceVisibility {
        backface-visibility: visible;
    }
}
#transform-box .cube .front {
    transform: translateZ(60px);
    border-color: rgba(239, 68, 68, 0.6);
    background: rgba(239, 68, 68, 0.08);
}
#transform-box .cube .back {
    transform: rotateY(180deg) translateZ(60px);
    border-color: rgba(16, 185, 129, 0.6);
    background: rgba(16, 185, 129, 0.08);
}
#transform-box .cube .right {
    transform: rotateY(90deg) translateZ(60px);
    border-color: rgba(59, 130, 246, 0.6);
    background: rgba(59, 130, 246, 0.08);
}
#transform-box .cube .left {
    transform: rotateY(-90deg) translateZ(60px);
    border-color: rgba(250, 204, 21, 0.6);
    background: rgba(250, 204, 21, 0.1);
}
#transform-box .cube .top {
    transform: rotateX(90deg) translateZ(60px);
    border-color: rgba(168, 85, 247, 0.6);
    background: rgba(168, 85, 247, 0.08);
}
#transform-box .cube .bottom {
    transform: rotateX(-90deg) translateZ(60px);
    border-color: rgba(34, 197, 94, 0.6);
    background: rgba(34, 197, 94, 0.08);
}
#transform-box .cube .front {
    transform: translateZ(60px);
}
#transform-box .cube .back {
    transform: rotateY(180deg) translateZ(60px);
}
#transform-box .cube .right {
    transform: rotateY(90deg) translateZ(60px);
}
#transform-box .cube .left {
    transform: rotateY(-90deg) translateZ(60px);
}
#transform-box .cube .top {
    transform: rotateX(90deg) translateZ(60px);
}
#transform-box .cube .bottom {
    transform: rotateX(-90deg) translateZ(60px);
}

#transform-box .axes {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    transform-style: preserve-3d;
    transform: translate(-50%, -50%);
}
#transform-box .axis {
    position: absolute;
    transform-origin: 50% 50%;
}
#transform-box .axis.x {
    left: -60px;
    top: 0;
    width: 120px;
    height: 4px;
    background: #ef4444;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.6);
}
#transform-box .axis.y {
    left: 0;
    top: -60px;
    width: 4px;
    height: 120px;
    background: #22c55e;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.6);
}
#transform-box .axis.z {
    left: 0;
    top: -60px;
    width: 4px;
    height: 120px;
    background: #3b82f6;
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.6);
    transform: rotateX(89deg);
}

/* Toggle wireframe visibility */
#transform-box .cube,
#transform-box .axes {
    display: none;
}
#transform-box.wireframe .cube,
#transform-box.wireframe .axes {
    display: block;
}

/* Responsivo */
@media (max-width: 860px) {
    .preview {
        grid-template-columns: 1fr;
    }
    .wheel-wrap {
        grid-template-columns: 1fr;
    }
}

.controls-grid input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #ddd;
    outline: none;
    appearance: none;
    transition: background 0.3s ease;
}

.controls-grid input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-accent);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.controls-grid input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--color-primary);
    transform: scale(1.1);
}

.controls-grid input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-accent);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.controls-grid input[type="range"]::-moz-range-thumb:hover {
    background: var(--color-primary);
    transform: scale(1.1);
}