@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@400;500;600;700&family=Play:wght@400;700&display=swap');

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #00071b;
    color: #ffffff;
    min-height: 100vh;
    overflow: hidden;
}

/* ===== Video background ===== */
.video-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.video-bg video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 140%;
    object-fit: cover;
    transition: opacity 0.8s ease;
}

.video-bg video.hidden-video {
    opacity: 0;
}

/* ===== Gradient overlay ===== */
.video-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    background:
        linear-gradient(to top, #00071b 0%, #00071b 5%, transparent 45%),
        linear-gradient(to bottom, #00071b 0%, transparent 15%),
        linear-gradient(to right, #00071b 0%, transparent 10%),
        linear-gradient(to left, #00071b 0%, transparent 10%);
}

/* ===== Header logos ===== */
.header {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1400px;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 40px;
}

.header img {
    height: 40px;
    object-fit: contain;
}

/* ===== Start button (arc) ===== */
.start-screen {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.btn-arc-wrap {
    position: relative;
    width: 480px;
    height: 480px;
    cursor: pointer;
    background: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-arc-wrap .arc-ring {
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: rgba(0, 180, 255, 0.8);
    border-right-color: rgba(0, 180, 255, 0.3);
    animation: arc-spin 3s linear infinite;
}

.btn-arc-wrap .arc-ring:nth-child(2) {
    width: 360px;
    height: 360px;
    border-top-color: rgba(226, 54, 54, 0.7);
    border-left-color: rgba(226, 54, 54, 0.3);
    animation: arc-spin-rev 2.5s linear infinite;
}

.btn-arc-wrap .arc-ring:nth-child(3) {
    width: 465px;
    height: 465px;
    border-top-color: rgba(0, 180, 255, 0.4);
    border-bottom-color: rgba(0, 180, 255, 0.15);
    animation: arc-spin 4s linear infinite;
}

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

.btn-arc-wrap .arc-core {
    position: relative;
    width: 270px;
    height: 270px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, #162a40, #0a0e1a);
    border: 1px solid rgba(0, 180, 255, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.4s ease;
    box-shadow: 0 0 25px rgba(0, 180, 255, 0.15);
}

.btn-arc-wrap .arc-core .icon {
    width: 0;
    height: 0;
    border-left: 36px solid rgba(0, 180, 255, 0.9);
    border-top: 24px solid transparent;
    border-bottom: 24px solid transparent;
    margin-left: 9px;
    transition: all 0.3s ease;
}

.btn-arc-wrap .arc-core .label {
    font-family: 'Rajdhani', sans-serif;
    font-size: 24px;
    font-weight: 600;
    color: rgba(0, 180, 255, 0.7);
    letter-spacing: 3px;
    text-transform: uppercase;
}

.btn-arc-wrap:hover .arc-core {
    background: radial-gradient(circle at 35% 35%, #1a3a5c, #0a1628);
    border-color: rgba(0, 200, 255, 0.7);
    box-shadow: 0 0 40px rgba(0, 180, 255, 0.3);
    transform: scale(1.08);
}

.btn-arc-wrap:hover .arc-core .icon {
    border-left-color: #fff;
    filter: drop-shadow(0 0 6px rgba(0, 200, 255, 0.8));
}

.btn-arc-wrap:active .arc-core {
    transform: scale(0.95);
}

/* ===== Subtitles ===== */
.subtitles {
    position: fixed;
    bottom: 260px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    max-width: 740px;
    width: 90%;
    display: none;
    transition: bottom 0.3s ease;
}

.subtitles.visible {
    display: block;
}

.sub-final {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 16px 28px 16px 18px;
    background: rgba(0, 20, 50, 0.35);
    border-radius: 12px;
    border: 1px solid rgba(0, 180, 255, 0.12);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: opacity 0.3s ease;
}

.sub-final.hidden-sub {
    opacity: 0;
    pointer-events: none;
}

.sub-final .eq-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1.5px solid rgba(0, 180, 255, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2.5px;
    flex-shrink: 0;
    background: rgba(0, 20, 50, 0.5);
    box-shadow: 0 0 15px rgba(0, 180, 255, 0.1);
}

.sub-final .eq-circle .bar {
    width: 2.5px;
    background: #00b4ff;
    border-radius: 2px;
    animation: eq-bounce 0.8s ease-in-out infinite alternate;
}

.sub-final .eq-circle .bar:nth-child(1) { height: 6px; animation-delay: 0s; }
.sub-final .eq-circle .bar:nth-child(2) { height: 12px; animation-delay: 0.1s; }
.sub-final .eq-circle .bar:nth-child(3) { height: 18px; animation-delay: 0.2s; }
.sub-final .eq-circle .bar:nth-child(4) { height: 12px; animation-delay: 0.3s; }
.sub-final .eq-circle .bar:nth-child(5) { height: 6px; animation-delay: 0.4s; }

@keyframes eq-bounce {
    0% { transform: scaleY(0.4); }
    100% { transform: scaleY(1.6); }
}

.sub-final .sub-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.sub-final .sub-text {
    font-family: 'Play', sans-serif;
    font-size: 21px;
    color: rgba(255, 255, 255, 0.92);
    line-height: 1.5;
}

.sub-final .sub-text .hl { color: #7fdbff; }

.sub-final .underline-track {
    height: 2px;
    background: rgba(0, 180, 255, 0.1);
    border-radius: 1px;
    overflow: hidden;
}

.sub-final .underline-track .runner {
    width: 40%;
    height: 100%;
    background: linear-gradient(90deg, transparent, #00b4ff, transparent);
    animation: runner-slide 2.5s ease-in-out infinite;
}

@keyframes runner-slide {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}

/* ===== Mic capsule ===== */
.mic-panel {
    position: fixed;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: none;
}

.mic-panel.visible {
    display: block;
}

.mic-capsule {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 28px 14px 18px;
    background: rgba(0, 20, 50, 0.35);
    border-radius: 40px;
    border: 1px solid rgba(0, 180, 255, 0.2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    cursor: pointer;
    transition: all 0.3s ease;
}

.mic-capsule:hover {
    border-color: rgba(0, 200, 255, 0.5);
    box-shadow: 0 0 25px rgba(0, 180, 255, 0.15);
}

.mic-capsule.recording {
    border-color: rgba(226, 54, 54, 0.4);
    box-shadow: 0 0 25px rgba(226, 54, 54, 0.15);
}

.mic-capsule .mic-dot {
    position: relative;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(0, 180, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.mic-capsule.recording .mic-dot {
    background: rgba(226, 54, 54, 0.12);
}

.mic-capsule .mic-dot .mic-svg {
    fill: none;
    stroke: #00b4ff;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    width: 22px;
    height: 22px;
}

.mic-capsule.recording .mic-dot .mic-svg {
    stroke: #e23636;
}

.mic-capsule .mic-dot .ring-anim {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 1.5px solid rgba(0, 180, 255, 0.4);
    animation: ring-breathe 2s ease-in-out infinite;
}

.mic-capsule.recording .mic-dot .ring-anim {
    border-color: rgba(226, 54, 54, 0.4);
}

@keyframes ring-breathe {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.15); opacity: 0.8; }
}

.mic-capsule .text-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.mic-capsule .text-group .main {
    font-family: 'Play', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 1px;
}

.mic-capsule .text-group .hint {
    font-family: 'Rajdhani', sans-serif;
    font-size: 12px;
    color: rgba(0, 180, 255, 0.5);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.mic-capsule.recording .text-group .hint {
    color: rgba(226, 54, 54, 0.5);
}

.mic-capsule .wave-mini {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: 8px;
}

.mic-capsule .wave-mini .bar {
    width: 2.5px;
    background: #00b4ff;
    border-radius: 2px;
    animation: eq-mini 0.8s ease-in-out infinite alternate;
}

.mic-capsule.recording .wave-mini .bar {
    background: #e23636;
}

.mic-capsule .wave-mini .bar:nth-child(1) { height: 5px; animation-delay: 0s; }
.mic-capsule .wave-mini .bar:nth-child(2) { height: 10px; animation-delay: 0.1s; }
.mic-capsule .wave-mini .bar:nth-child(3) { height: 16px; animation-delay: 0.2s; }
.mic-capsule .wave-mini .bar:nth-child(4) { height: 10px; animation-delay: 0.3s; }
.mic-capsule .wave-mini .bar:nth-child(5) { height: 5px; animation-delay: 0.4s; }

@keyframes eq-mini {
    0% { transform: scaleY(0.4); }
    100% { transform: scaleY(1.5); }
}

/* ===== Options (answers) ===== */
.options-panel {
    position: fixed;
    bottom: 85px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: none;
}

.options-panel.visible {
    display: block;
}

.options-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 900px;
}

.opt-neon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 260px;
    padding: 24px 20px 20px;
    background: linear-gradient(180deg, rgba(0, 20, 50, 0.5), rgba(10, 14, 26, 0.7));
    border: 1px solid rgba(0, 180, 255, 0.15);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.35s ease;
    position: relative;
    overflow: hidden;
}

.opt-neon::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(200, 170, 50, 0.5), transparent);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.opt-neon:hover::after { transform: scaleX(1); }

.opt-neon:hover {
    border-color: rgba(0, 200, 255, 0.4);
    box-shadow: 0 4px 30px rgba(0, 180, 255, 0.1);
    transform: translateY(-3px);
}

.opt-neon .letter {
    font-family: 'Orbitron', sans-serif;
    font-size: 24px;
    font-weight: 900;
    color: rgba(200, 170, 50, 0.7);
    transition: all 0.3s;
}

.opt-neon:hover .letter {
    color: #c8aa32;
    text-shadow: 0 0 15px rgba(200, 170, 50, 0.4);
}

.opt-neon .sep {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 180, 255, 0.3), transparent);
}

.opt-neon .text {
    font-family: 'Rajdhani', sans-serif;
    font-size: 16px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 0.3px;
    text-align: center;
    line-height: 1.4;
    transition: color 0.3s;
}

.opt-neon:hover .text { color: #fff; }

.opt-neon.selected {
    border-color: rgba(200, 170, 50, 0.5);
    box-shadow: 0 0 25px rgba(200, 170, 50, 0.1), 0 0 25px rgba(0, 180, 255, 0.1);
}

.opt-neon.selected .letter {
    color: #e0c850;
    text-shadow: 0 0 20px rgba(200, 170, 50, 0.5);
}

.opt-neon.selected::after { transform: scaleX(1); }

.opt-neon.correct {
    border-color: rgba(0, 204, 102, 0.5);
    box-shadow: 0 0 25px rgba(0, 204, 102, 0.15);
}

.opt-neon.correct::after {
    background: linear-gradient(90deg, transparent, rgba(0, 204, 102, 0.6), transparent);
    transform: scaleX(1);
}

.opt-neon.correct .letter {
    color: #00cc66;
    text-shadow: 0 0 15px rgba(0, 204, 102, 0.4);
}

.opt-neon.correct .text { color: #fff; }

.opt-neon .check {
    display: none;
    position: absolute;
    top: 8px; right: 10px;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: rgba(0, 204, 102, 0.2);
    border: 1.5px solid rgba(0, 204, 102, 0.6);
    align-items: center;
    justify-content: center;
}

.opt-neon.correct .check { display: flex; }

.opt-neon .check svg {
    width: 12px; height: 12px;
    stroke: #00cc66; stroke-width: 3;
    fill: none; stroke-linecap: round; stroke-linejoin: round;
}

.opt-neon.wrong {
    border-color: rgba(255, 60, 60, 0.4);
    box-shadow: 0 0 20px rgba(255, 60, 60, 0.1);
    opacity: 0.7;
}

.opt-neon.wrong::after {
    background: linear-gradient(90deg, transparent, rgba(255, 60, 60, 0.5), transparent);
    transform: scaleX(1);
}

.opt-neon.wrong .letter {
    color: rgba(255, 80, 80, 0.8);
    text-shadow: 0 0 10px rgba(255, 60, 60, 0.3);
}

.opt-neon .cross {
    display: none;
    position: absolute;
    top: 8px; right: 10px;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: rgba(255, 60, 60, 0.15);
    border: 1.5px solid rgba(255, 60, 60, 0.5);
    align-items: center;
    justify-content: center;
}

.opt-neon.wrong .cross { display: flex; }

.opt-neon .cross svg {
    width: 10px; height: 10px;
    stroke: #ff4444; stroke-width: 3;
    fill: none; stroke-linecap: round;
}

/* ===== Progress bar ===== */
.progress-row {
    width: 100%;
    max-width: 700px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.progress-bar {
    flex: 1;
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: #e23636;
    border-radius: 2px;
    width: 30%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    white-space: nowrap;
}