:root {
    --medical-blue: #0076FF;
    --medical-light: #E5F1FF;
    --hypertension-red: #FF3B30;
    --hypertension-dark: #8E0000;
    --white: #FFFFFF;
    --shadow: rgba(0, 0, 0, 0.1);
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    touch-action: none;
}

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #f0f2f5;
    font-family: var(--font-main);
}

#game-container {
    width: 100vw;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background: url('assets/medical_lab_background.png') no-repeat center center;
    background-size: cover;
    overflow: hidden;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, transform 0.5s ease;
    z-index: 10;
}

.screen.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(1.05);
}

/* Start Screen */
#start-screen {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.game-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    color: var(--medical-blue);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.game-subtitle {
    font-size: 1.5rem;
    color: #444;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.vs {
    font-size: 1rem;
    font-weight: bold;
    color: var(--hypertension-red);
    padding: 5px 10px;
    border: 2px solid var(--hypertension-red);
    border-radius: 50%;
}

.team-preview {
    display: flex;
    gap: 4rem;
    margin-bottom: 3rem;
}

.team-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s ease;
}

.team-card:hover {
    transform: translateY(-10px);
}

.team-card img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    filter: drop-shadow(0 10px 15px var(--shadow));
}

.team-card span {
    font-weight: 600;
    font-size: 1.2rem;
}

.team-card.dr span { color: var(--medical-blue); }
.team-card.hypertension span { color: var(--hypertension-red); }

.btn-primary {
    padding: 1.2rem 3rem;
    font-size: 1.5rem;
    font-family: var(--font-heading);
    font-weight: bold;
    border: none;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--medical-blue), #00A3FF);
    color: white;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(0, 118, 255, 0.3);
    transition: all 0.3s ease;
}

.btn-primary:active {
    transform: scale(0.95);
    box-shadow: 0 5px 10px rgba(0, 118, 255, 0.2);
}

.instructions {
    margin-top: 1rem;
    color: #666;
    font-size: 1rem;
    font-style: italic;
}

.name-entry {
    margin-bottom: 2rem;
    width: 100%;
    max-width: 400px;
}

#dr-name-input {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1.5rem;
    font-family: var(--font-heading);
    border: 2px solid rgba(0, 118, 255, 0.2);
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(5px);
    color: var(--medical-blue);
    text-align: center;
    transition: all 0.3s ease;
    outline: none;
}

#dr-name-input::placeholder {
    color: #aaa;
}

#dr-name-input:focus {
    border-color: var(--medical-blue);
    background: white;
    box-shadow: 0 0 15px rgba(0, 118, 255, 0.2);
    transform: translateY(-2px);
}

/* Game Screen */
#game-canvas {
    width: 100%;
    height: 100%;
}

.hud {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: 800px;
    z-index: 20;
}

.score-bar {
    height: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    border: 2px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 10px var(--shadow);
}

#progress-indicator {
    height: 100%;
    width: 50%;
    background: linear-gradient(to right, var(--hypertension-red), var(--medical-blue));
    transition: width 0.1s linear;
}

#interaction-area {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 15;
    pointer-events: none;
}

#button-container {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 60px;
    pointer-events: auto;
    z-index: 25;
}

.control-btn {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 4px solid var(--white);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.control-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    border-radius: 50%;
    background: var(--medical-blue);
    opacity: 0.3;
    transition: all 0.2s ease;
}

.control-btn.pressed {
    transform: scale(0.9);
    background: rgba(0, 118, 255, 0.6);
    box-shadow: 0 0 40px var(--medical-blue);
    border-color: var(--medical-blue);
}

.control-btn.pressed::after {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

/* Specific glows for buttons */
#btn-1.pressed { box-shadow: 0 0 50px rgba(0, 118, 255, 0.8); }
#btn-2.pressed { box-shadow: 0 0 50px rgba(0, 118, 255, 0.8); }
#btn-3.pressed { box-shadow: 0 0 50px rgba(0, 118, 255, 0.8); }

/* End Screen */
#end-screen {
    background: rgba(255, 255, 255, 0.9);
}

#end-title {
    font-size: 4rem;
    font-family: var(--font-heading);
    margin-bottom: 1rem;
}

.win { color: var(--medical-blue); }
.loss { color: var(--hypertension-red); }

#end-message {
    font-size: 1.5rem;
    margin-bottom: 3rem;
    color: #555;
}

.btn-secondary {
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
    border: 2px solid var(--medical-blue);
    border-radius: 50px;
    background: transparent;
    color: var(--medical-blue);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--medical-blue);
    color: white;
}

/* Screen Shake Animation */
@keyframes shake {
    0% { transform: translate(1px, 1px) rotate(0deg); }
    10% { transform: translate(-1px, -2px) rotate(-1deg); }
    20% { transform: translate(-3px, 0px) rotate(1deg); }
    30% { transform: translate(3px, 2px) rotate(0deg); }
    40% { transform: translate(1px, -1px) rotate(1deg); }
    50% { transform: translate(-1px, 2px) rotate(-1deg); }
    60% { transform: translate(-3px, 1px) rotate(0deg); }
    70% { transform: translate(3px, 1px) rotate(-1deg); }
    80% { transform: translate(-1px, -1px) rotate(1deg); }
    90% { transform: translate(1px, 2px) rotate(0deg); }
    100% { transform: translate(1px, -2px) rotate(-1deg); }
}

.shake {
    animation: shake 0.5s;
    animation-iteration-count: infinite;
}