/* ========================================
   MindFlow PWA - Styles
   ======================================== */

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

:root {
    --color-bg: #0a0f1a;
    --color-bg-light: #141c2b;
    --color-primary: #2A4365;
    --color-primary-light: #3d5a80;
    --color-accent: #10B981;
    --color-warning: #F97316;
    --color-danger: #ef4444;
    --color-text: #ffffff;
    --color-text-muted: #94a3b8;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-primary);
    background: var(--color-bg);
    color: var(--color-text);
}

#app {
    width: 100%;
    height: 100%;
    position: relative;
}

/* Screens */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.screen.active {
    display: flex;
}

.screen.overlay {
    background: rgba(10, 15, 26, 0.95);
    z-index: 100;
}

/* Start Screen */
#start-screen {
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-light) 100%);
}

.start-content {
    text-align: center;
    padding: 40px;
}

.app-title {
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
    color: var(--color-text);
}

.app-tagline {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 48px;
    font-weight: 300;
}

.app-instruction {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 48px;
}

.btn-start {
    background: var(--color-primary);
    color: var(--color-text);
    border: none;
    padding: 18px 48px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-primary);
}

.btn-start:hover,
.btn-start:active {
    background: var(--color-primary-light);
    transform: scale(1.02);
}

.btn-install {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    padding: 12px 32px;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-primary);
    margin-top: 16px;
}

.btn-install:hover,
.btn-install:active {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* Game Screen */
#game-screen {
    background: var(--color-bg);
}

#network-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    touch-action: none;
}

/* HUD */
.hud {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    padding-top: max(20px, env(safe-area-inset-top));
    pointer-events: none;
    z-index: 10;
}

.hud-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 20px;
}

.hud-label {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.hud-value {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-text);
}

.captured-container .hud-value {
    color: var(--color-accent);
}

/* Speed Indicator */
.speed-indicator {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    z-index: 10;
}

.speed-fill {
    height: 100%;
    width: 0%;
    background: var(--color-accent);
    border-radius: 3px;
    transition: width 0.1s ease, background 0.3s ease;
}

.speed-fill.warning {
    background: var(--color-warning);
}

.speed-fill.danger {
    background: var(--color-danger);
}

/* Feedback Message */
.feedback {
    position: absolute;
    bottom: 140px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 10;
    text-align: center;
}

.feedback.visible {
    opacity: 1;
}

.feedback.good {
    color: var(--color-accent);
}

.feedback.warning {
    color: var(--color-warning);
}

.feedback.danger {
    color: var(--color-danger);
}

/* Pause Button */
.btn-pause {
    position: absolute;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: rgba(20, 28, 43, 0.8);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    color: var(--color-text);
    cursor: pointer;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 10;
}

/* Pause Screen */
.pause-content {
    text-align: center;
}

.pause-content h2 {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 12px;
}

.pause-content p {
    color: var(--color-text-muted);
    margin-bottom: 40px;
}

.btn-action {
    display: block;
    width: 200px;
    margin: 12px auto;
    padding: 16px 32px;
    background: var(--color-primary);
    color: var(--color-text);
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-primary);
    transition: all 0.3s ease;
}

.btn-action:hover,
.btn-action:active {
    background: var(--color-primary-light);
}

.btn-action.btn-secondary {
    background: transparent;
    border: 1px solid var(--color-text-muted);
    color: var(--color-text-muted);
}

.btn-action.btn-secondary:hover {
    border-color: var(--color-text);
    color: var(--color-text);
    background: transparent;
}

/* Result Screen */
#result-screen {
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-light) 100%);
}

.result-content {
    text-align: center;
    padding: 40px;
}

.result-content h2 {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 40px;
}

.result-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 32px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-message {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    font-style: italic;
}

.btn-link {
    display: inline-block;
    margin-top: 16px;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.btn-link:hover {
    color: var(--color-text);
}

/* Responsive */
@media (max-width: 480px) {
    .app-title {
        font-size: 2.4rem;
    }
    
    .hud {
        padding: 12px;
    }
    
    .hud-item {
        padding: 8px 14px;
    }
    
    .hud-value {
        font-size: 1.1rem;
    }
    
    .result-stats {
        gap: 20px;
    }
    
    .stat-value {
        font-size: 1.6rem;
    }
}

/* Animation for calm effect */
@keyframes pulse-calm {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        box-shadow: 0 0 20px 10px rgba(16, 185, 129, 0.1);
    }
}

.streak-container.pulsing {
    animation: pulse-calm 2s infinite;
}

/* Touch feedback */
.touch-point {
    position: absolute;
    width: 60px;
    height: 60px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    transition: transform 0.1s ease, opacity 0.3s ease;
}

.touch-point.active {
    transform: translate(-50%, -50%) scale(1.2);
    border-color: var(--color-accent);
}