/* Base body styles */
body {
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    font-family: 'Darker Grotesque', 'Offside', 'Calibri', sans-serif;
    background: linear-gradient(135deg, #183b7a 0%, #71a6d2 100%);
    display: flex; 
    justify-content: center;
    align-items: center;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, p {
    margin: 20px;
    padding: 20px;
    text-align: center;
    text-wrap: balance;
    text-decoration: none;
}

/* Game Container */
#game-container {
    position: relative;
    /*width: 600px;
    height: 400px;*/
    background: #0e1c3f;
    border-radius: 20px;
    box-shadow:
      0 0 20px #3b70e4,
      inset 0 0 30px #1e335f;
    overflow: hidden;
    user-select: none;
}

/* Main Canvas */
#myCanvas {
    display: block;
    /*width: 600px;
    height: 400px;*/
    border-radius: 20px;
    border: 5px solid #000;
    background: linear-gradient(180deg, #87ceeb 0%, #e0f6ff 100%);
    box-shadow:
      inset 0 50px 80px rgba(255,255,255,0.2),
      inset 0 -50px 80px rgba(0,0,0,0.4);
    transition: opacity 0.45s ease, transform 0.45s ease;
    opacity: 1;
}

/* Canvas fade transitions */
.fade-in {
    opacity: 1 !important;
    transform: scale(1) !important;
}

.fade-out {
    opacity: 0.35 !important;
    transform: scale(0.98) !important;
}

/* Controls (dropdown for animation states) */
.controls {
    position: absolute;
    z-index: 10;
    top: 10px;
    left: 10px;
    background: rgba(14, 28, 63, 0.8);
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(59, 112, 228, 0.5);
}

.controls select,
.controls option {
    font-size: 14px;
    font-family: 'Calibri', sans-serif;
    color: #000;
    padding: 5px;
    border-radius: 5px;
    border: 2px solid #3b70e4;
    background: #fff;
    cursor: pointer;
}

/* Score Display */
#score {
    position: absolute;
    margin: 20px 30px;
    transform: translateX(-50%);
    font-size: 2.3rem;
    font-family: 'Offside', sans-serif;
    font-weight: 900;
    color: #ffd93b;
    text-shadow: 
      0 0 10px #ffeb3b,
      0 0 20px #ffc107,
      2px 2px 4px rgba(0,0,0,0.5);
    letter-spacing: 3px;
    pointer-events: none;
    user-select: none;
    z-index: 15;
}

/* Start Screen */
#start-screen {
    position: absolute;
    z-index: 25;
    inset: 0;
    background: linear-gradient(135deg, #183b7a 0%, #3c6fcf 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 20px;
    color: #d1e8ff;
    user-select: none;
}

#start-screen h1 {
    font-size: 3.5rem;
    font-family: 'Darker Grotesque', 'Offside', sans-serif;
    margin: 0 0 10px 0;
    padding: 0;
    color: #ffd93b;
    text-shadow: 
      0 0 20px #ffeb3b,
      0 0 40px #ffc107;
}

#start-screen p {
    font-size: 1.4rem;
    margin: 0 0 25px 0;
    padding: 0 20px;
    color: #bcd8ffcc;
}

/* Animated bird in Start Screen */
#previewCanvas {
    position: relative;
    animation: bob 2s infinite ease-in-out;
    filter: drop-shadow(0 0 15px #ffd93b);
}

#start-btn:hover {
    background: linear-gradient(135deg, #1dee8d 0%, #4edc93 100%);
    box-shadow: 
      0 0 30px #1dee8d,
      0 8px 20px rgba(29, 238, 141, 0.5);
    color: rgb(6, 105, 64);
    transform: translateY(-2px);
}

/* Start Button */
#start-btn {
    background: linear-gradient(135deg, #4edc93 0%, #1abf72 100%);
    border: none;
    border-radius: 25px;
    padding: 18px 60px;
    font-size: 2rem;
    font-family: 'Darker Grotesque', 'Offside', sans-serif;
    color: rgb(16, 98, 64);
    font-weight: 900;
    box-shadow: 
      0 0 20px #1abf72,
      0 5px 15px rgba(26, 191, 114, 0.4);
    cursor: pointer;
    transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
    user-select: none;
}

#start-btn:active {
    transform: translateY(0);
}

@keyframes bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Game Over Screen */
#game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(24, 49, 103, 0.95);
    border-radius: 25px;
    padding: 40px 50px;
    text-align: center;
    color: #f85050;
    font-weight: 700;
    box-shadow:
      0 0 30px #cd4242,
      0 0 60px #ff484880 inset;
    display: none;
    user-select: none;
    z-index: 20;
}

#game-over h1 {
    margin: 0 0 10px 0;
    padding: 0;
    font-size: 3.2rem;
    color: #ef6060;
    text-shadow: 0 0 15px #d24646;
}

#game-over p {
    font-size: 1.5rem;
    margin: 10px 0 20px;
    padding: 0;
    color: #acc9ffcc;
}

/* Restart Button */
#restart-btn {
    cursor: pointer;
    background: linear-gradient(135deg, #5189ff 0%, #2962ff 100%);
    border: none;
    border-radius: 15px;
    padding: 14px 36px;
    font-size: 1.6rem;
    font-family: 'Darker Grotesque', 'Offside', sans-serif;
    color: white;
    font-weight: 800;
    box-shadow:
      0 0 15px #3f6cff,
      0 5px 10px #244ddb99;
    transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
}

#restart-btn:hover {
    background: linear-gradient(135deg, #3f6cff 0%, #1845ff 100%);
    box-shadow:
      0 0 25px #4378ff,
      0 8px 20px #1e53ffbb;
    transform: translateY(-2px);
}

#restart-btn:active {
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 700px) {
    #game-container {
        width: 70%;
        max-width: 80%;
        aspect-ratio: 3 / 2;
    }
    
    #myCanvas {
        width: 70%;
        max-width: 75%;
        min-width: 50%;
    }
    
    .controls {
        top: 5px;
        left: 5px;
        padding: 5px;
    }
    
    #score {
        font-size: 2rem;
    }
    
    #start-screen h1 {
        font-size: 2.5rem;
    }
    
    #start-screen p {
        font-size: 1.2rem;
    }
    
    #start-btn {
        font-size: 1.6rem;
        padding: 14px 40px;
    }
    
    #game-over h1 {
        font-size: 2.5rem;
    }
    
    #game-over p {
        font-size: 1.2rem;
    }
}

@media (max-width: 400px) {
    #start-screen h1 {
        font-size: 2rem;
    }
    
    #start-bird {
        width: 70px;
        height: 70px;
    }
}