:root {
    color-scheme: dark;
    font-family: Roboto, Arial, sans-serif;
    color: #f1f1f1;
    background: #0f0f0f;
    --youtube-red: #ff0033;
    --surface: #0f0f0f;
    --surface-raised: #212121;
    --surface-hover: #303030;
    --text-primary: #f1f1f1;
    --text-secondary: #aaa;
    --divider: rgba(255, 255, 255, 0.14);
    --header-height: 64px;
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    min-width: 320px;
    margin: 0;
    overflow-x: hidden;
    background: var(--surface);
}

button,
a {
    font: inherit;
}

button:focus-visible,
a:focus-visible,
.thumb-container:focus-visible {
    outline: 2px solid #3ea6ff;
    outline-offset: 3px;
}

.topbar {
    position: relative;
    z-index: 30;
    display: grid;
    grid-template-columns: minmax(250px, 1fr) auto minmax(250px, 1fr);
    align-items: center;
    width: 100%;
    height: var(--header-height);
    padding: 0 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(15, 15, 15, 0.96);
    backdrop-filter: blur(18px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    width: fit-content;
    color: var(--text-primary);
    text-decoration: none;
}

.youtube-logo {
    width: 38px;
    height: 28px;
    object-fit: cover;
    object-position: left center;
}

.brand-name {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.35px;
}

.brand-edition {
    padding: 5px 9px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.score-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    min-width: 208px;
    height: 44px;
    padding: 0 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 999px;
    background: var(--surface-raised);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.24);
}

.score-stat {
    display: flex;
    align-items: baseline;
    gap: 7px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
}

.score-stat strong {
    min-width: 16px;
    color: var(--text-primary);
    font-size: 17px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    text-align: center;
}

.score-divider {
    width: 1px;
    height: 18px;
    background: var(--divider);
}

.creator {
    display: flex;
    align-items: center;
    justify-self: end;
    gap: 10px;
    padding: 4px 4px 4px 12px;
    border-radius: 999px;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 160ms ease;
}

.creator:hover {
    background: var(--surface-raised);
}

.creator-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    line-height: 1.15;
}

.creator-copy small {
    color: var(--text-secondary);
    font-size: 10px;
}

.creator-copy strong {
    font-size: 12px;
    font-weight: 600;
}

.creator img {
    width: 36px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, 0.16);
    border-radius: 50%;
    object-fit: cover;
}

.game-shell {
    position: relative;
    min-height: calc(100vh - var(--header-height));
    padding: 16px 16px 48px;
    background:
        radial-gradient(circle at 50% 0, rgba(255, 0, 51, 0.08), transparent 34%),
        var(--surface);
}

.game-stage {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: min(1600px, 100%);
    min-height: calc(100vh - var(--header-height) - 64px);
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 22px;
    background: #181818;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
}

.video-panel {
    position: relative;
    isolation: isolate;
    min-width: 0;
    min-height: 600px;
    overflow: hidden;
    background: #181818;
}

.video-panel--known {
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.thumb-container {
    position: absolute;
    inset: 0;
    z-index: -3;
    overflow: hidden;
    background: #181818;
    cursor: pointer;
}

.thumb-container::after {
    position: absolute;
    inset: 0;
    content: "";
    background: rgba(0, 0, 0, 0.12);
    pointer-events: none;
    transition: background 220ms ease;
}

.video-panel:hover .thumb-container::after {
    background: rgba(0, 0, 0, 0.02);
}

.thumb-container img,
.thumb-container iframe {
    width: 100%;
    height: 100%;
    border: 0;
    object-fit: cover;
}

.thumb-container img {
    transform: scale(1.015);
    transition: transform 700ms cubic-bezier(0.2, 0, 0, 1);
}

.video-panel:hover .thumb-container img {
    transform: scale(1.045);
}

.panel-gradient {
    position: absolute;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background:
        linear-gradient(180deg, rgba(0, 0, 0, 0.62) 0%, transparent 30%),
        linear-gradient(0deg, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.12) 54%, transparent 72%),
        linear-gradient(90deg, rgba(0, 0, 0, 0.16), transparent 50%);
}

.panel-content {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100%;
    padding: 28px clamp(24px, 4vw, 64px) 48px;
    pointer-events: none;
}

.channel-info {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 570px;
}

.channel-info img {
    flex: 0 0 auto;
    width: 42px;
    height: 42px;
    border: 2px solid rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    background: var(--surface-raised);
    object-fit: cover;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.28);
}

.title {
    display: -webkit-box;
    overflow: hidden;
    color: #fff;
    font-size: clamp(15px, 1.2vw, 18px);
    font-weight: 600;
    line-height: 1.35;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.65);
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 4;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 46px;
    border-radius: 13px;
    background: rgba(0, 0, 0, 0.74);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.32);
    pointer-events: none;
    transform: translate(-50%, -50%);
    transition: background 160ms ease, transform 160ms ease;
}

.video-panel:hover .play-overlay {
    background: var(--youtube-red);
    transform: translate(-50%, -50%) scale(1.06);
}

.play-triangle {
    width: 0;
    height: 0;
    margin-left: 3px;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 14px solid #fff;
}

.view-result,
.challenge-block {
    position: relative;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    align-self: center;
    width: min(540px, 100%);
    text-align: center;
}

.view-kicker,
.question {
    margin: 0 0 10px;
    color: rgba(255, 255, 255, 0.88);
    font-size: clamp(16px, 1.55vw, 22px);
    font-weight: 500;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.72);
}

.views {
    margin: 0;
    color: #fff;
    font-size: clamp(40px, 5vw, 74px);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -2.5px;
    font-variant-numeric: tabular-nums;
    text-shadow: 0 4px 26px rgba(0, 0, 0, 0.68);
}

.hidden-views {
    display: none;
    margin: 4px 0 22px;
    color: #fff;
}

.choice-area {
    display: flex;
    gap: 12px;
    width: min(390px, 100%);
    margin-top: 14px;
}

.choice-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    flex: 1;
    min-height: 52px;
    padding: 0 22px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 999px;
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    pointer-events: auto;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(12px);
    transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}

.choice-button svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.choice-button--higher {
    border-color: var(--youtube-red);
    background: var(--youtube-red);
}

.choice-button--higher:hover {
    background: #e9002e;
    transform: translateY(-2px);
}

.choice-button--lower {
    background: rgba(33, 33, 33, 0.82);
}

.choice-button--lower:hover {
    border-color: rgba(255, 255, 255, 0.58);
    background: rgba(48, 48, 48, 0.94);
    transform: translateY(-2px);
}

.choice-button:active {
    transform: scale(0.98);
}

.versus {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 12;
    display: grid;
    place-items: center;
    width: 66px;
    height: 66px;
    border: 6px solid #0f0f0f;
    border-radius: 50%;
    background: #fff;
    color: #0f0f0f;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.38);
    transform: translate(-50%, -50%);
}

.versus span {
    font-size: 15px;
    font-weight: 900;
    letter-spacing: -0.6px;
}

.game-hint {
    position: absolute;
    bottom: 14px;
    left: 50%;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #717171;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.35px;
    text-transform: uppercase;
    transform: translateX(-50%);
}

.live-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--youtube-red);
    box-shadow: 0 0 0 4px rgba(255, 0, 51, 0.12);
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.76);
    backdrop-filter: blur(14px);
}

.modal-content {
    width: min(390px, 100%);
    padding: 34px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 24px;
    background: #212121;
    color: var(--text-primary);
    text-align: center;
    box-shadow: 0 28px 90px rgba(0, 0, 0, 0.58);
}

.modal-icon {
    display: grid;
    place-items: center;
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: rgba(255, 0, 51, 0.14);
    color: var(--youtube-red);
}

.modal-icon svg {
    width: 30px;
    height: 30px;
    fill: currentColor;
}

.modal-eyebrow {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.modal-content h2 {
    margin: 6px 0 10px;
    font-size: 34px;
    letter-spacing: -1px;
}

.modal-content p {
    margin: 0 0 26px;
    color: var(--text-secondary);
    font-size: 16px;
}

.modal-content button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    width: 100%;
    min-height: 50px;
    border: 0;
    border-radius: 999px;
    background: #fff;
    color: #0f0f0f;
    font-weight: 700;
    cursor: pointer;
    transition: background 150ms ease, transform 150ms ease;
}

.modal-content button:hover {
    background: #e5e5e5;
    transform: translateY(-1px);
}

.modal-content button svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.loader {
    display: none;
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--youtube-red);
    border-radius: 50%;
    animation: spin 800ms linear infinite;
}

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

#confetti-container {
    position: fixed;
    bottom: 0;
    left: 0;
    z-index: 9999;
    width: 100%;
    height: 0;
    overflow: visible;
    pointer-events: none;
}

.confetti {
    position: absolute;
    opacity: 0.95;
    will-change: transform, opacity;
}

/* Laptops y pantallas medianas: encaja el juego completo sin scroll vertical. */
@media (min-width: 1025px) and (max-width: 1399px) {
    :root {
        --header-height: 56px;
    }

    body {
        height: 100vh;
        overflow: hidden;
    }

    .topbar {
        grid-template-columns: minmax(220px, 1fr) auto minmax(220px, 1fr);
        padding: 0 18px;
    }

    .youtube-logo {
        width: 34px;
        height: 25px;
    }

    .brand-name {
        font-size: 15px;
    }

    .brand-edition {
        padding: 4px 7px;
        font-size: 9px;
    }

    .score-container {
        min-width: 188px;
        height: 38px;
        padding: 0 16px;
        gap: 12px;
    }

    .score-stat strong {
        font-size: 15px;
    }

    .creator img {
        width: 32px;
        height: 32px;
    }

    .game-shell {
        height: calc(100vh - var(--header-height));
        min-height: 0;
        padding: 10px 12px 34px;
    }

    .game-stage {
        height: 100%;
        min-height: 0;
        border-radius: 18px;
    }

    .video-panel {
        min-height: 0;
    }

    .panel-content {
        padding: 20px clamp(26px, 3vw, 44px) 32px;
    }

    .channel-info {
        gap: 10px;
    }

    .channel-info img {
        width: 36px;
        height: 36px;
    }

    .title {
        font-size: clamp(14px, 1.15vw, 16px);
    }

    .play-overlay {
        width: 56px;
        height: 40px;
        border-radius: 11px;
    }

    .view-kicker,
    .question {
        margin-bottom: 8px;
        font-size: clamp(15px, 1.4vw, 19px);
    }

    .views {
        font-size: clamp(38px, 4.5vw, 60px);
        letter-spacing: -2px;
    }

    .hidden-views {
        margin-bottom: 16px;
    }

    .choice-area {
        width: min(350px, 100%);
        margin-top: 10px;
    }

    .choice-button {
        min-height: 46px;
        padding: 0 18px;
        font-size: 14px;
    }

    .choice-button svg {
        width: 18px;
        height: 18px;
    }

    .versus {
        width: 56px;
        height: 56px;
        border-width: 5px;
    }

    .versus span {
        font-size: 13px;
    }

    .game-hint {
        bottom: 10px;
        font-size: 9px;
    }
}

@media (max-width: 900px) {
    :root {
        --header-height: 58px;
    }

    .topbar {
        grid-template-columns: 1fr auto;
        padding: 0 14px;
    }

    .brand-edition,
    .creator-copy {
        display: none;
    }

    .creator {
        display: none;
    }

    .score-container {
        justify-self: end;
        min-width: 154px;
        height: 40px;
        padding: 0 14px;
        gap: 10px;
    }

    .score-stat {
        gap: 5px;
    }

    .game-shell {
        padding: 10px 10px 42px;
    }

    .game-stage {
        grid-template-columns: 1fr;
        min-height: auto;
        border-radius: 18px;
    }

    .video-panel {
        min-height: 480px;
    }

    .video-panel--known {
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    }

    .panel-content {
        padding: 22px 24px 38px;
    }

    .versus {
        top: 50%;
        width: 58px;
        height: 58px;
        border-width: 5px;
    }

    .views {
        font-size: clamp(38px, 10vw, 62px);
    }
}

@media (max-width: 520px) {
    .brand-name {
        max-width: 88px;
        font-size: 14px;
        line-height: 1.05;
    }

    .youtube-logo {
        width: 34px;
    }

    .score-container {
        min-width: 142px;
        padding: 0 12px;
    }

    .stat-label {
        font-size: 10px;
    }

    .score-stat strong {
        font-size: 15px;
    }

    .video-panel {
        min-height: 410px;
    }

    .panel-content {
        padding: 18px 18px 34px;
    }

    .channel-info img {
        width: 36px;
        height: 36px;
    }

    .title {
        font-size: 14px;
    }

    .view-kicker,
    .question {
        font-size: 16px;
    }

    .choice-area {
        gap: 8px;
    }

    .choice-button {
        min-height: 48px;
        padding: 0 16px;
    }

    .play-overlay {
        width: 54px;
        height: 39px;
        border-radius: 10px;
    }

    .game-hint {
        width: max-content;
        max-width: calc(100% - 24px);
        font-size: 9px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}