*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: #fff;
    font-family: 'Poppins', sans-serif;
    background: #1a202c;
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
}

.text-shadow {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

p {
    margin: 0;
}

button {
    font-family: inherit;
}

.lives-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2.5rem;
    z-index: 20;
}

.settings-btn {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: color 0.2s ease-in-out;
}

.settings-btn:hover {
    color: #ffffff;
}

.settings-icon {
    width: 2.25rem;
    height: 2.25rem;
}

.main-stage {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 6rem 2rem 10rem;
    box-sizing: border-box;
}

.bomb-container {
    position: relative;
    width: 16rem;
    height: 16rem;
}

.bomb-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.bomb-text {
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 65%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    pointer-events: none;
}

.substring-display {
    margin: 0;
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 700;
    color: #f6ad55;
    letter-spacing: 0.12rem;
}

.control-panel {
    position: fixed;
    top: 50%;
    right: 2rem;
    transform: translateY(-50%);
    width: 14rem;
    padding: 1.5rem;
    border-radius: 1rem;
    background: rgba(26, 32, 44, 0.85);
    backdrop-filter: blur(6px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    z-index: 15;
    display: flex;
    flex-direction: column;
}

.control-heading {
    margin: 0 0 1.25rem;
    font-size: 1.6rem;
    font-weight: 600;
    text-align: center;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.75rem;
}

.control-label {
    font-size: 0.8rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    color: rgba(226, 232, 240, 0.75);
}

.control-panel.collapsed {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-50%) translateX(1rem);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.control-panel:not(.collapsed) {
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.control-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    background: #2d3748;
    color: #e2e8f0;
    font-size: 0.95rem;
    text-align: left;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.control-btn:hover {
    background: #4a5568;
    transform: translateX(-2px);
}

.control-btn.active {
    background: #ed8936;
    color: #1a202c;
}

.difficulty-note {
    display: inline-block;
    margin-left: 0.3rem;
    font-size: 0.75rem;
    color: rgba(226, 232, 240, 0.7);
}

.start-btn {
    width: 100%;
    padding: 0.9rem 1rem;
    border-radius: 0.75rem;
    font-size: 1.05rem;
    font-weight: 600;
    background: #38a169;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

.start-btn:hover:not(:disabled) {
    background: #2f855a;
    transform: translateY(-1px);
}

.start-note {
    margin-top: 1rem;
    font-size: 0.75rem;
    color: rgba(226, 232, 240, 0.65);
    text-align: center;
}

.start-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.bottom-controls {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    padding: 1.5rem 2rem 2rem;
    background: linear-gradient(180deg, rgba(26, 32, 44, 0) 0%, rgba(26, 32, 44, 0.8) 36%, rgba(26, 32, 44, 0.95) 100%);
    box-sizing: border-box;
}

.timer-bar-container {
    width: min(90vw, 40rem);
    height: 0.9rem;
    border-radius: 9999px;
    overflow: hidden;
    background: rgba(74, 85, 104, 0.6);
}

.timer-bar-inner {
    height: 100%;
    width: 0;
    transition: width 0.1s linear;
    background: #68d391;
}

.word-form {
    display: flex;
    justify-content: center;
    width: 100%;
}

.word-input-container {
    position: relative;
    width: min(90vw, 40rem);
    border-radius: 0.75rem;
    border: 2px solid rgba(100, 116, 139, 0.6);
    background: rgba(45, 55, 72, 0.9);
    padding: 0.5rem 1.25rem;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.word-preview-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: calc(100% - 2.5rem);
    text-align: center;
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 600;
    pointer-events: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #ffffff;
}

.word-input {
    width: 100%;
    border: none;
    background: transparent;
    color: transparent;
    font-size: clamp(1.6rem, 4.5vw, 2.4rem);
    font-weight: 600;
    text-align: center;
    outline: none;
    caret-color: #f6ad55;
    padding: 0.6rem 0;
}

.alphabet-container {
    width: min(92vw, 40rem);
    display: grid;
    grid-template-columns: repeat(13, minmax(0, 1fr));
    gap: 0.35rem;
    text-align: center;
    font-size: 0.95rem;
}

.alphabet-char {
    padding: 0.45rem 0;
    border-radius: 0.5rem;
    background: rgba(45, 55, 72, 0.85);
    transition: background-color 0.3s, color 0.3s;
}

.alphabet-char.used {
    background-color: #f6ad55;
    color: #1a202c;
}

.life-icon {
    width: 2rem;
    height: 2rem;
    transition: color 0.2s ease;
}

.life-icon--active {
    color: #f97373;
}

.life-icon--inactive {
    color: rgba(226, 232, 240, 0.35);
}

@keyframes shake {
    0%,
    100% {
        transform: translateX(0);
    }
    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-5px);
    }
    20%,
    40%,
    60%,
    80% {
        transform: translateX(5px);
    }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

@keyframes pulse {
    0%,
    100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 1.5s infinite ease-in-out;
}

.highlighted-substring {
    color: #68d391;
}

@media (max-width: 1024px) {
    .control-panel {
        right: 1rem;
        width: 12rem;
    }
}

@media (max-width: 768px) {
    .control-panel {
        top: auto;
        bottom: 8rem;
        right: 50%;
        transform: translate(50%, 0);
        width: min(90vw, 20rem);
    }

    .main-stage {
        padding: 8rem 1rem 14rem;
    }
}