:root {
    --font-primary: 'Orbitron', sans-serif;
    --color-bg: #0d0d0d;
    --color-surface: #1a1a1a;
    --color-primary: #00f2ff;
    --color-secondary: #ff3f6f;
    --color-accent: #ffc907;
    --color-text: #f5f5f5;
    --shadow-deep: 0 12px 35px rgba(0, 0, 0, 0.8);
    --shadow-lifted: 0 6px 20px rgba(0, 0, 0, 0.6);
    --glow-primary: 0 0 15px rgba(0, 242, 255, 0.6), 0 0 25px rgba(0, 242, 255, 0.4);
    --glow-secondary: 0 0 15px rgba(255, 63, 111, 0.6);
    --glow-accent: 0 0 15px rgba(255, 201, 7, 0.6);
}

body, html {
    background-color: var(--color-bg);
    background-image: linear-gradient(to bottom, #0d0d0d, #1a1a1a);
    color: var(--color-text);
    font-family: var(--font-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 100%;
    width: 100%;
    margin: 0;
    overflow: hidden;
}

.hidden { display: none !important; }

/* --- Main Menu --- */
#main-menu {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 45px;
    background: var(--color-surface);
    border-radius: 25px;
    box-shadow: var(--shadow-deep);
    border: 2px solid rgba(255,255,255,0.1);
}

#main-menu h1 {
    font-weight: 700;
    font-size: 3.5rem;
    color: var(--color-primary);
    text-shadow: var(--glow-primary);
    margin: 0 0 25px 0;
    letter-spacing: 2px;
}

#main-menu p {
    font-size: 1.3rem;
    margin-bottom: 30px;
}

#player-name-input {
    background: rgba(0,0,0,0.4);
    border: 2px solid rgba(255,255,255,0.2);
    color: var(--color-text);
    padding: 14px 18px;
    border-radius: 10px;
    font-size: 1.2rem;
    text-align: center;
    margin-bottom: 30px;
    transition: all 0.3s ease;
}
#player-name-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--glow-primary);
}

#start-game-btn {
    padding: 18px 45px;
    background-image: linear-gradient(45deg, var(--color-primary), #00a2b6);
    color: #000;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1.6rem;
    letter-spacing: 1.5px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lifted);
}
#start-game-btn:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 10px 25px rgba(0, 229, 255, 0.5);
}

/* --- Game Container & UI --- */
#game-container { position: relative; width: 100%; max-width: 1024px; aspect-ratio: 16 / 9; box-shadow: var(--shadow-deep); }
#game-canvas { width: 100%; height: 100%; border-radius: 8px; }
#ui { position: absolute; top: 20px; left: 20px; right: 20px; display: flex; justify-content: space-between; align-items: flex-start; font-weight: 700; font-size: 1.2rem; text-shadow: 0 3px 6px rgba(0,0,0,0.9); pointer-events: none; }

#player-stats, #boss-stats { display: flex; flex-direction: column; gap: 10px; }
#boss-stats { text-align: right; }

.health-bar-container { display: flex; flex-direction: column; }
#player-name-display, #boss-name-display { padding: 4px 12px; background: rgba(0,0,0,0.6); border-radius: 5px; margin-bottom: 5px; }

.health-bar-outer {
    background-color: rgba(0,0,0,0.6);
    border: 2px solid rgba(255,255,255,0.25);
    width: 320px;
    height: 24px;
    border-radius: 8px;
    padding: 4px;
    box-shadow: var(--shadow-lifted);
}

.health-bar-inner {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s ease;
    box-shadow: inset 0 0 8px rgba(0,0,0,0.7);
}

#player-health-bar { background-image: linear-gradient(to right, #00ff87, #6dd5ed); box-shadow: var(--glow-primary); }
#boss-health-bar { background-image: linear-gradient(to right, var(--color-secondary), #ff758c); box-shadow: var(--glow-secondary); }
#stamina-bar { background-image: linear-gradient(to right, var(--color-accent), #fde38a); box-shadow: var(--glow-accent); }

#stamina-container { margin-top: 6px; }
#timer { background: rgba(0,0,0,0.7); padding: 10px 20px; border-radius: 8px; font-size: 1.6rem; border: 2px solid rgba(255,255,255,0.25); }

/* --- Modals --- */
.modal-container { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(0,0,0,0.85); display: flex; justify-content: center; align-items: center; backdrop-filter: blur(8px); }
.modal-content { background: var(--color-surface); padding: 45px 55px; border-radius: 20px; border: 2px solid rgba(255,255,255,0.15); box-shadow: var(--shadow-deep); text-align: center; }
.modal-content h1 { font-weight: 700; font-size: 3rem; color: var(--color-primary); text-shadow: var(--glow-primary); margin: 0 0 18px 0; }
.modal-content p { font-size: 1.3rem; }
.modal-content button { padding: 14px 35px; background-image: linear-gradient(45deg, var(--color-primary), #00a2b6); color: #000; border: none; border-radius: 10px; font-weight: 700; font-size: 1.4rem; cursor: pointer; margin-top: 25px; transition: all 0.2s ease-in-out; }
.modal-content button:hover { box-shadow: 0 6px 18px rgba(0, 229, 255, 0.5); transform: scale(1.05); }

#leaderboard-list { list-style: none; padding: 0; margin: 25px 0; font-size: 1.2rem; text-align: left; font-weight: 400; }
#leaderboard-list li { padding: 6px 0; border-bottom: 1px solid rgba(255,255,255,0.15); }

/* --- Mobile Controls --- */
#mobile-controls { 
    position: absolute; 
    bottom: 15px; 
    left: 0; 
    right: 0; 
    display: none; 
    justify-content: space-between; 
    align-items: flex-end; 
    padding: 0 20px 10px 20px; 
    pointer-events: none; 
    z-index: 100;
}
.control-cluster { display: flex; gap: 15px; pointer-events: all; }

#mobile-controls button {
    width: 60px; height: 60px; border-radius: 50%;
    background: rgba(30, 30, 30, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.4);
    color: white; font-size: 24px; font-weight: 700;
    user-select: none; -webkit-tap-highlight-color: transparent;
    transition: all 0.1s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.7);
    backdrop-filter: blur(5px);
}

#mobile-controls button:active { 
    background: var(--color-primary); 
    color: #000; 
    transform: scale(0.95); 
    box-shadow: 0 0 20px var(--color-primary); 
}

#action-buttons { gap: 12px; }
#action-buttons #jump-btn { width: 70px; height: 70px; font-size: 32px; order: -1; }

/* --- Responsive Design --- */
@media (hover: none) and (pointer: coarse) { 
    #mobile-controls { display: flex; } 
}

/* Tablet & Small Desktop */
@media (max-width: 1024px) {
    #ui { font-size: 1rem; top: 15px; left: 15px; right: 15px; }
    .health-bar-outer { width: 220px !important; height: 20px !important; }
    #timer { font-size: 1.3rem; padding: 8px 16px; }
    #player-name-display, #boss-name-display { font-size: 0.9rem; }
}

/* Mobile Landscape & Portrait */
@media (max-width: 768px) {
    #ui { font-size: 0.85rem; top: 10px; left: 10px; right: 10px; }
    .health-bar-outer { width: 160px !important; height: 16px !important; }
    #stamina-container .health-bar-outer { width: 120px !important; height: 12px !important; }
    #timer { font-size: 1.1rem; padding: 6px 12px; }
    #player-name-display, #boss-name-display { font-size: 0.8rem; padding: 3px 8px; }
    
    #mobile-controls { bottom: 10px; padding: 0 15px 5px 15px; }
    #mobile-controls button { width: 55px; height: 55px; font-size: 22px; }
    #action-buttons #jump-btn { width: 65px; height: 65px; font-size: 28px; }
    .control-cluster { gap: 12px; }
}

/* Small Mobile */
@media (max-width: 480px) {
    #main-menu h1 { font-size: 2.2rem; }
    #main-menu p { font-size: 1rem; }
    #player-name-input { font-size: 1rem; padding: 12px 16px; }
    #start-game-btn { font-size: 1.3rem; padding: 14px 35px; }
    
    #ui { font-size: 0.75rem; top: 8px; left: 8px; right: 8px; gap: 8px; }
    .health-bar-outer { width: 130px !important; height: 14px !important; }
    #stamina-container .health-bar-outer { width: 100px !important; height: 10px !important; }
    #timer { font-size: 0.95rem; padding: 5px 10px; }
    #player-name-display, #boss-name-display { font-size: 0.7rem; padding: 2px 6px; }
    
    #mobile-controls { bottom: 8px; padding: 0 10px 5px 10px; }
    #mobile-controls button { width: 50px; height: 50px; font-size: 20px; border-width: 1.5px; }
    #action-buttons #jump-btn { width: 58px; height: 58px; font-size: 26px; }
    .control-cluster { gap: 10px; }
    
    .modal-content { padding: 30px 35px; }
    .modal-content h1 { font-size: 2.2rem; }
    .modal-content p { font-size: 1.1rem; }
}

/* Extra Small Mobile */
@media (max-width: 375px) {
    #ui { flex-direction: column; align-items: center; gap: 5px; }
    #boss-stats { text-align: center; margin-top: 5px; }
    .health-bar-outer { width: 110px !important; height: 12px !important; }
    #stamina-container { display: none; } /* Hide stamina on very small screens */
    
    #mobile-controls button { width: 45px; height: 45px; font-size: 18px; }
    #action-buttons #jump-btn { width: 52px; height: 52px; font-size: 24px; }
    .control-cluster { gap: 8px; }
}