/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent; /* Disable touch blue outline on mobile */
    user-select: none; /* Prevent text selection */
    -webkit-user-select: none;
}

:root {
    --bg-dark: #0a0e17;
    --bg-panel: #111827;
    
    /* Number Colors (Vibrant and Colorful for active gameplay) */
    --color-num-1: #e91e63; /* Vibrant Berry Pink-Red */
    --color-num-2: #2196f3; /* Vibrant Medium Blue */
    --color-num-3: #00bcd4; /* Vibrant Teal */
    --color-num-4: #ff9800; /* Vibrant Orange */
    --color-num-5: #4caf50; /* Vibrant Green */
    --color-num-6: #9c27b0; /* Vibrant Purple */
    --color-num-7: #f44336; /* Vibrant Crimson Red */
    --color-num-8: #00e5ff; /* Vibrant Bright Cyan-Blue */
    --color-num-9: #ffeb3b; /* Vibrant Yellow */

    /* Text Colors inside grid buttons */
    --btn-text-color: #ffffff; /* Bright white text for high contrast */
    
    /* System Colors */
    --color-wrong: #d32f2f; /* Errors turn bright red */
    --color-correct: #2e7d32;
    --color-seq-inactive-bg: #151c28;
    --color-seq-inactive-text: #343f52;
}

body {
    background-color: #06090e;
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

/* Mobile Frame Wrapper for Desktop Previews */
.mobile-frame {
    width: 100%;
    height: 100vh;
    max-width: 440px;
    max-height: 900px;
    background-color: var(--bg-dark);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* On Desktop, add a subtle border/radius to mimic a phone */
@media (min-width: 480px) {
    .mobile-frame {
        border-radius: 40px;
        box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 0 12px #1e293b;
        height: 85vh;
        max-height: 850px;
    }
}

/* Game Container */
.game-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 20px;
    position: relative;
    justify-content: center; /* Centers layout vertically on mobile */
    align-items: center;
}

/* Header & Timer */
.game-header {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 5px 0;
    margin-top: 0;
    width: 100%;
}

.timer {
    font-size: 5.5rem;
    font-weight: 900;
    color: #272f3c; /* Huge watermark-like timer */
    letter-spacing: -3px;
    font-family: 'Montserrat', sans-serif;
    line-height: 1;
    transition: color 0.3s ease;
}

.timer.running {
    color: #2d3848;
}

/* Sequence Bar */
.sequence-section {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 10px 0 15px 0; /* Reduced bottom margin to bring keyboard closer */
    width: 100%;
}

.sequence-list {
    display: flex;
    gap: 6px;
    justify-content: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 5px;
    width: 100%;
}

/* Hide scrollbar for sequence list */
.sequence-list::-webkit-scrollbar {
    display: none;
}

.sequence-item {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background-color: var(--color-seq-inactive-bg);
    color: var(--color-seq-inactive-text);
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 800;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
}

/* Active sequence item: takes on the number's unique color and dark text */
.sequence-item.active {
    background-color: var(--bg-active);
    color: #111111;
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.15);
}

.sequence-item.completed {
    background-color: rgba(21, 28, 40, 0.3);
    color: rgba(52, 63, 82, 0.2);
    transform: scale(0.9);
}

/* Play Area */
.play-area {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
}

.grid-container {
    width: 100%;
    position: relative;
    border-radius: 20px;
}

/* Numbers Grid (3x3) */
.numbers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    width: 100%;
}

/* Grid Buttons */
.grid-btn {
    aspect-ratio: 1 / 1;
    border-radius: 18px;
    border: none;
    font-family: 'Outfit', sans-serif;
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--btn-text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: background-color 0.1s ease, transform 0.1s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    outline: none;
}

/* Map numbers 1-9 to variables */
.grid-btn.num-1 { background-color: var(--color-num-1); }
.grid-btn.num-2 { background-color: var(--color-num-2); }
.grid-btn.num-3 { background-color: var(--color-num-3); }
.grid-btn.num-4 { background-color: var(--color-num-4); }
.grid-btn.num-5 { background-color: var(--color-num-5); }
.grid-btn.num-6 { background-color: var(--color-num-6); }
.grid-btn.num-7 { background-color: var(--color-num-7); }
.grid-btn.num-8 { background-color: var(--color-num-8); }
.grid-btn.num-9 { background-color: var(--color-num-9); color: #111111; }

.grid-btn:active {
    transform: scale(0.92);
}

/* Success animation */
.grid-btn.correct-pulse {
    animation: correct-ripple 0.3s ease-out;
}

/* Error state: turns red and shakes */
.grid-btn.wrong-flash {
    background-color: var(--color-wrong) !important;
    color: #ffffff !important;
    animation: shake 0.4s ease-in-out;
    pointer-events: none; /* Disable clicking while flashing red */
}

/* Start Overlay */
.start-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 14, 23, 0.7);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    cursor: pointer;
    transition: opacity 0.3s ease, visibility 0.3s;
}

.overlay-text {
    color: #ffffff;
    font-size: 2.2rem;
    font-weight: 900;
    font-family: 'Montserrat', sans-serif;
    letter-spacing: -0.5px;
    text-align: center;
    pointer-events: none;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.6);
}

.start-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Victory Overlay (Full Screen inside Frame) */
.victory-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(6, 9, 14, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s;
    padding: 20px;
}

.victory-overlay.show {
    opacity: 1;
    visibility: visible;
}

.victory-card {
    text-align: center;
    background-color: var(--bg-panel);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 30px;
    padding: 40px 30px;
    width: 100%;
    max-width: 340px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6);
    transform: scale(0.8);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.victory-overlay.show .victory-card {
    transform: scale(1);
}

.victory-badge {
    font-size: 4rem;
    margin-bottom: 15px;
    animation: bounce 1.5s infinite alternate;
}

.victory-title {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 25px;
    color: #ffffff;
}

.victory-time-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #6b7280;
    margin-bottom: 5px;
}

.victory-time-value {
    font-size: 3.5rem;
    font-weight: 900;
    color: #10b981;
    margin-bottom: 35px;
    font-family: 'Outfit', sans-serif;
}

.btn-restart {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    border: none;
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 800;
    border-radius: 50px;
    width: 100%;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-restart:active {
    transform: scale(0.96);
    box-shadow: 0 5px 10px rgba(59, 130, 246, 0.2);
}

/* Animations */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    15%, 45%, 75% { transform: translateX(-8px); }
    30%, 60%, 90% { transform: translateX(8px); }
}

@keyframes correct-ripple {
    0% { transform: scale(1); filter: brightness(1.5); }
    50% { transform: scale(0.9); }
    100% { transform: scale(1); filter: brightness(1); }
}

@keyframes bounce {
    0% { transform: translateY(0); }
    100% { transform: translateY(-10px); }
}

/* Shuffle effect styles (applied via JS class during transitions) */
.shuffle-fade {
    opacity: 0;
    transform: scale(0.85);
}