/* ============================================
   Pulse — A PNEUOMA Game
   Rhythm-Based Focus Training
   ============================================ */

:root {
    --bg-deep: #0a0612;
    --bg-mid: #12081a;
    --bg-surface: #1a0f24;
    
    --accent-primary: #ff6b9d;
    --accent-secondary: #c084fc;
    --accent-tertiary: #818cf8;
    --accent-glow: rgba(255, 107, 157, 0.4);
    
    --text-primary: #f8f0ff;
    --text-secondary: #b794c7;
    --text-muted: #7c6489;
    
    --font-main: 'Outfit', -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-main);
    background: var(--bg-deep);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   Screens
   ============================================ */
.screen {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
}

.screen.active {
    display: flex;
}

/* ============================================
   Title Screen
   ============================================ */
.title-content {
    text-align: center;
    padding: 2rem;
    max-width: 500px;
}

.back-link {
    position: fixed;
    top: 1.5rem;
    left: 1.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.back-link:hover {
    color: var(--accent-primary);
}

/* Title Visual */
.title-visual {
    margin-bottom: 2rem;
}

.title-pulse {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 0 auto;
}

.pulse-ring {
    position: absolute;
    inset: 0;
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    opacity: 0.3;
}

.pulse-ring.ring-1 {
    animation: title-pulse 2s ease-in-out infinite;
}

.pulse-ring.ring-2 {
    inset: -15px;
    border-color: var(--accent-secondary);
    animation: title-pulse 2s ease-in-out infinite 0.3s;
}

.pulse-ring.ring-3 {
    inset: -30px;
    border-color: var(--accent-tertiary);
    animation: title-pulse 2s ease-in-out infinite 0.6s;
}

@keyframes title-pulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.1); opacity: 0.6; }
}

.pulse-core {
    position: absolute;
    inset: 40px;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
    border-radius: 50%;
    animation: core-beat 1s ease-in-out infinite;
}

@keyframes core-beat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

/* Title Text */
.game-title {
    font-size: 4rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.game-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.game-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* Instructions */
.instructions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.instruction {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-surface);
    border-radius: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.instruction-icon {
    font-size: 1.2rem;
}

/* Start Button */
.btn-start {
    position: relative;
    padding: 1.25rem 3rem;
    font-family: var(--font-main);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--bg-deep);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: 50px;
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-start:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 40px var(--accent-glow);
}

.btn-pulse {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: inherit;
    animation: btn-pulse-anim 2s ease-in-out infinite;
}

@keyframes btn-pulse-anim {
    0%, 100% { opacity: 0; transform: scale(0.8); }
    50% { opacity: 1; transform: scale(1); }
}

.mic-notice {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================
   Game Screen
   ============================================ */
#game-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
}

/* HUD */
.hud {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    pointer-events: none;
    z-index: 10;
}

.hud-left, .hud-right {
    min-width: 120px;
}

.hud-center {
    text-align: center;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.stat-bar {
    width: 100px;
    height: 6px;
    background: var(--bg-surface);
    border-radius: 3px;
    overflow: hidden;
}

.stat-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 3px;
    transition: width 0.3s;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
}

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

#bpm-value {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--accent-primary);
    line-height: 1;
}

.bpm-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

/* Breath Guide */
.breath-guide {
    position: fixed;
    bottom: 15%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.75rem 1.5rem;
    background: rgba(26, 15, 36, 0.8);
    border: 1px solid rgba(255, 107, 157, 0.2);
    border-radius: 30px;
    font-size: 1rem;
    color: var(--text-secondary);
    pointer-events: none;
    z-index: 10;
    backdrop-filter: blur(10px);
}

/* Combo Display */
.combo-display {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-shadow: 0 0 30px var(--accent-glow);
    pointer-events: none;
    z-index: 20;
    animation: combo-pop 0.5s ease-out forwards;
}

.combo-display.hidden {
    display: none;
}

@keyframes combo-pop {
    0% { transform: translate(-50%, -50%) scale(0.5); opacity: 0; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0; }
}

/* Session Timer */
.session-timer {
    position: fixed;
    bottom: 1.5rem;
    right: 2rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    pointer-events: none;
    z-index: 10;
}

/* ============================================
   Complete Screen
   ============================================ */
.complete-content {
    text-align: center;
    padding: 2rem;
    max-width: 500px;
}

.complete-visual {
    margin-bottom: 2rem;
}

.complete-rings {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto;
}

.complete-ring {
    position: absolute;
    inset: 0;
    border: 2px solid var(--accent-secondary);
    border-radius: 50%;
    animation: complete-expand 2s ease-out infinite;
}

.complete-ring:nth-child(2) {
    animation-delay: 0.4s;
}

.complete-ring:nth-child(3) {
    animation-delay: 0.8s;
}

@keyframes complete-expand {
    0% { transform: scale(0.5); opacity: 1; }
    100% { transform: scale(2); opacity: 0; }
}

.complete-title {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.complete-message {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Stats */
.session-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-surface);
    padding: 1.25rem;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.stat-icon {
    font-size: 1.5rem;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.stat-name {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.complete-insight {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    padding: 0 1rem;
}

/* Actions */
.complete-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-primary {
    padding: 1rem 2.5rem;
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 500;
    color: var(--bg-deep);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 40px var(--accent-glow);
}

.btn-secondary {
    padding: 1rem 2.5rem;
    font-family: var(--font-main);
    font-size: 1rem;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--text-muted);
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 600px) {
    .game-title {
        font-size: 3rem;
    }
    
    .title-pulse {
        width: 140px;
        height: 140px;
    }
    
    .hud {
        padding: 1rem;
    }
    
    .stat-bar {
        width: 80px;
    }
    
    #bpm-value {
        font-size: 2rem;
    }
    
    .session-stats {
        gap: 0.75rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
}