:root {
    --accent: #4dd8ff;
    --warn: #ff5a5a;
    --win: #5aff8a;
    --bg: #070b12;
}

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

html,
body {
    height: 100%;
    background: var(--bg);
    overflow: hidden;
    font-family: "Segoe UI", system-ui, sans-serif;
    user-select: none;
}

.stage {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.6s;
}

/* ---------- ambient glow behind the face ---------- */
.glow {
    position: absolute;
    width: 75vmin;
    height: 75vmin;
    border-radius: 50%;
    background: radial-gradient(circle,
            color-mix(in srgb, var(--accent) 16%, transparent),
            transparent 70%);
    filter: blur(12px);
    transition: background 0.6s;
}

/* ---------- face ---------- */
.face {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6vmin;
    transition: opacity 0.6s, filter 0.6s, transform 0.6s;
}

/* end screen: face shrinks up so the result text owns the center */
body.endscreen .face {
    transform: scale(0.55) translateY(-24vmin);
}

body.endscreen .banner {
    display: none;
}

.eyes-row {
    display: flex;
    gap: 15vmin;
}

.eye {
    width: 16vmin;
    height: 16vmin;
    background: var(--accent);
    border-radius: 50%;
    position: relative;
    transition: all 0.45s cubic-bezier(0.6, 0, 0.3, 1);
    animation: blink 4.2s infinite;
}

.pupil {
    position: absolute;
    width: 42%;
    height: 42%;
    background: var(--bg);
    border-radius: 50%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    transition: transform 0.35s, opacity 0.3s;
}

@keyframes blink {

    0%,
    93%,
    100% {
        transform: scaleY(1);
    }

    96% {
        transform: scaleY(0.06);
    }
}

@keyframes blinkSlow {

    0%,
    88%,
    100% {
        transform: scaleY(0.55);
    }

    94% {
        transform: scaleY(0.05);
    }
}

@keyframes look {

    0%,
    100% {
        transform: translate(-50%, -50%);
    }

    25% {
        transform: translate(-78%, -58%);
    }

    50% {
        transform: translate(-28%, -42%);
    }

    75% {
        transform: translate(-60%, -30%);
    }
}

/* ---------- mouth ---------- */
.mouth {
    width: 34vmin;
    overflow: visible;
}

.mouth path {
    fill: none;
    stroke: var(--accent);
    stroke-width: 5;
    stroke-linecap: round;
    opacity: 0;
    transition: opacity 0.3s, stroke 0.4s;
}

.mouth path.active {
    opacity: 1;
}

#m-open {
    fill: var(--accent);
    stroke: none;
}

/* ---------- banner ---------- */
.banner {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 6vh;
    text-align: center;
    pointer-events: none;
}

.state-label {
    color: var(--accent);
    letter-spacing: 0.35em;
    text-transform: uppercase;
    font-size: 2.2vmin;
    opacity: 0.85;
    transition: color 0.4s;
}

.message {
    color: #dfe9f3;
    font-size: 3.4vmin;
    margin-top: 1.4vmin;
    min-height: 4.5vmin;
}

/* ---------- per-state accents ---------- */
.state-sad,
.state-lose {
    --accent: var(--warn);
}

.state-win {
    --accent: var(--win);
}

/* ---------- per-state behavior ---------- */
/* your_turn: the robot is nervous — trembling eyes, darting pupils */
.state-your_turn .eye {
    animation: blink 4.2s infinite, worry 0.9s infinite ease-in-out;
}

.state-your_turn .pupil {
    animation: look 1.1s infinite ease-in-out;
}

@keyframes worry {

    0%,
    100% {
        transform: scale(1.07) translateY(0);
    }

    50% {
        transform: scale(1.07) translateY(-0.6vmin);
    }
}

.state-thinking .pupil {
    animation: look 2.2s infinite ease-in-out;
}

.state-happy .eye,
.state-win .eye {
    background: transparent;
    border-top: 3vmin solid var(--accent);
    border-radius: 100% 100% 0 0 / 240% 240% 0 0;
    height: 10vmin;
    margin-top: 3vmin;
    animation: none;
    transform: none;
}

.state-happy .pupil,
.state-win .pupil {
    opacity: 0;
}

.state-lose .eye {
    animation: none;
    transform: scaleY(0.72) rotate(-3deg);
}

.state-lose .eye.right {
    transform: scaleY(0.72) rotate(3deg);
}

.state-sad .eye {
    animation: none;
    transform: scaleY(0.85) rotate(-4deg);
}

.state-sad .eye.right {
    transform: scaleY(0.85) rotate(4deg);
}

.state-sad .mouth {
    transform: rotate(0deg);
}

.state-waiting .face {
    opacity: 0.45;
    filter: saturate(0.5);
}

.state-waiting .eye {
    animation: blinkSlow 5s infinite;
}

/* ---------- dev panel ---------- */
.devpanel {
    position: fixed;
    top: 12px;
    right: 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 10px 12px;
    color: #cfe3f5;
    font-size: 13px;
    z-index: 10;
    backdrop-filter: blur(4px);
    max-width: 240px;
}

.devpanel h4 {
    font-size: 12px;
    font-weight: 600;
    opacity: 0.7;
    margin-bottom: 6px;
}

.devpanel button {
    margin: 3px;
    padding: 6px 10px;
    background: #16202e;
    color: #cfe8ff;
    border: 1px solid #2c3e55;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
}

.devpanel button:hover {
    background: #1f2d40;
}

.devpanel.hidden {
    display: none;
}