/* ===========================
   Memory Flash — Game UI
   =========================== */

/* ---- Header ---- */
.header {
    text-align: center;
}

.title {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---- Status Bar ---- */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: var(--bg-card);
    border-radius: 0.75rem;
    font-size: 0.8rem;
    box-shadow: 0 4px 12px var(--shadow-color);
}

.lives {
    display: flex;
    gap: 0.25rem;
}

.heart {
    font-size: 1rem;
    transition: all 0.3s ease;
}

.heart.empty {
    opacity: 0.3;
    filter: grayscale(1);
}

.heart.lost {
    animation: heartBreak 0.5s ease forwards;
}

@keyframes heartBreak {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.3);
    }

    100% {
        transform: scale(0.8);
        opacity: 0.3;
        filter: grayscale(1);
    }
}

/* ---- Power-ups ---- */
.power-ups {
    display: flex;
    gap: 0.5rem;
}

.power-up {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    background: var(--bg-key);
    padding: 0.25rem 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.power-up:hover:not(.disabled) {
    background: var(--bg-key-hover);
    border-color: var(--accent);
}

.power-up.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.power-up.active {
    border-color: var(--success);
    box-shadow: 0 0 10px var(--success-glow);
}

.power-up .icon {
    font-size: 0.9rem;
}

.power-up .count {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 0.75rem;
}

/* ---- Progress Section ---- */
.progress-section {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.level-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}

.level-badge {
    background: linear-gradient(135deg, var(--accent), #7c3aed);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-weight: 700;
    font-size: 0.85rem;
    transition: transform 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.level-badge:hover {
    border-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.level-badge.pop {
    animation: levelPop 0.4s ease;
}

@keyframes levelPop {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.15);
    }

    100% {
        transform: scale(1);
    }
}

.level-details {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.level-details span {
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-primary);
    font-weight: 600;
}

/* ---- Progress Bar ---- */
.progress-bar-container {
    background: var(--bg-key);
    border-radius: 0.5rem;
    height: 6px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #a855f7);
    border-radius: 0.5rem;
    transition: width 0.3s ease;
}

/* ---- Round Dots ---- */
.round-dots {
    display: flex;
    gap: 0.3rem;
    justify-content: center;
    margin-top: 0.2rem;
}

.dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--bg-key);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.dot.complete {
    background: var(--success);
    border-color: var(--success);
}

.dot.current {
    background: var(--accent);
    border-color: var(--accent);
    transform: scale(1.3);
}

/* ---- Display Area ---- */
.display-area {
    background: var(--bg-card);
    border-radius: 1rem;
    padding: 1.5rem 1rem;
    text-align: center;
    min-height: 115px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px var(--shadow-color);
}

.display-area.can-reveal:hover {
    border-color: var(--accent);
}

.display-area.flash-correct {
    animation: flashCorrect 0.5s ease;
}

.display-area.flash-wrong {
    animation: flashWrong 0.5s ease;
}

@keyframes flashCorrect {

    0%,
    100% {
        box-shadow: none;
    }

    50% {
        box-shadow: inset 0 0 30px var(--success-glow), 0 0 20px var(--success-glow);
    }
}

@keyframes flashWrong {

    0%,
    100% {
        box-shadow: none;
        transform: translateX(0);
    }

    20% {
        transform: translateX(-6px);
        box-shadow: inset 0 0 20px var(--error-glow);
    }

    40% {
        transform: translateX(6px);
    }

    60% {
        transform: translateX(-4px);
    }

    80% {
        transform: translateX(4px);
        box-shadow: inset 0 0 20px var(--error-glow);
    }
}

.display-area .reveal-hint {
    position: absolute;
    bottom: 0.5rem;
    font-size: 0.65rem;
    color: var(--text-muted);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.display-area.can-reveal .reveal-hint {
    opacity: 1;
}

/* ---- Timer ---- */
.timer-display {
    position: absolute;
    top: 0.6rem;
    right: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.timer-display.warning {
    color: var(--warning);
}

.timer-display.critical {
    color: var(--error);
    animation: blink 0.5s ease infinite;
}

@keyframes blink {
    50% {
        opacity: 0.5;
    }
}

.timer-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), #a855f7);
    border-radius: 0 0 1rem 1rem;
}

/* ---- Number Display & Digits ---- */
.number-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    min-height: 3rem;
    display: flex;
    gap: 0.05em;
    flex-wrap: wrap;
    justify-content: center;
    transition: transform 0.2s ease;
}

.number-display.correct-pop {
    animation: correctPop 0.3s ease;
}

@keyframes correctPop {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.08);
    }

    100% {
        transform: scale(1);
    }
}

.digit {
    transition: all 0.2s ease;
}

.digit.correct {
    color: var(--success);
    text-shadow: 0 0 15px var(--success-glow);
}

.digit.wrong {
    color: var(--error);
    text-shadow: 0 0 15px var(--error-glow);
}

.digit.pending {
    color: var(--text-muted);
}

.digit.showing {
    color: var(--accent);
    text-shadow: 0 0 20px var(--accent-glow);
}

.digit.ready {
    color: var(--text-muted);
    animation: readyPulse 1.5s ease-in-out infinite;
}

@keyframes readyPulse {

    0%,
    100% {
        opacity: 0.4;
    }

    50% {
        opacity: 0.8;
    }
}

.instruction {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* ---- New Best Indicator ---- */
.new-best {
    position: absolute;
    top: 0.6rem;
    left: 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--warning);
    opacity: 0;
    transform: translateY(-5px);
    transition: all 0.3s ease;
}

.new-best.visible {
    opacity: 1;
    transform: translateY(0);
    animation: bestGlow 1s ease infinite alternate;
}

@keyframes bestGlow {
    from {
        text-shadow: 0 0 5px rgba(245, 158, 11, 0.3);
    }

    to {
        text-shadow: 0 0 15px rgba(245, 158, 11, 0.6);
    }
}

/* ---- Level Up Toast ---- */
.level-toast {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    padding: 0.6rem 1.25rem;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
    z-index: 50;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.level-toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.level-toast .toast-level {
    font-family: 'JetBrains Mono', monospace;
}