/* ============================================
   Sync — Couples Co-Regulation
   Warm, intimate, connected aesthetic
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-deep: #1a0a14;
    --bg-mid: #2d1522;
    --bg-light: #3d1f30;
    --rose: #e88a9e;
    --rose-light: #f4b5c2;
    --rose-glow: rgba(232, 138, 158, 0.4);
    --amber: #f4a259;
    --amber-glow: rgba(244, 162, 89, 0.4);
    --gold: #ffd700;
    --text-primary: #f8e8ec;
    --text-secondary: #c9a0ab;
    --text-muted: #8a6a75;
    --synced: #a8e6cf;
    --synced-glow: rgba(168, 230, 207, 0.5);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50%;
    --transition: 0.4s ease;
    --transition-slow: 1s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
}

.game-container {
    width: 100%;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

/* Ambient Background */
.ambient-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 30%, var(--bg-mid) 0%, var(--bg-deep) 70%);
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float-glow 20s ease-in-out infinite;
}

.glow-1 {
    width: 400px;
    height: 400px;
    background: var(--rose);
    top: 10%;
    left: 10%;
}

.glow-2 {
    width: 350px;
    height: 350px;
    background: var(--amber);
    bottom: 10%;
    right: 10%;
    animation-delay: -10s;
}

@keyframes float-glow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, 20px) scale(1.1); }
}

/* Particles */
.particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--rose-light);
    border-radius: 50%;
    opacity: 0;
    animation: float-particle var(--duration, 15s) ease-in-out infinite;
    animation-delay: var(--delay, 0s);
}

@keyframes float-particle {
    0%, 100% { 
        opacity: 0;
        transform: translateY(0) scale(0);
    }
    10% { 
        opacity: 0.6;
        transform: translateY(-20px) scale(1);
    }
    90% { 
        opacity: 0.6;
        transform: translateY(-100px) scale(1);
    }
    100% { 
        opacity: 0;
        transform: translateY(-120px) scale(0);
    }
}

/* Navigation */
.game-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    opacity: 0.7;
    transition: opacity var(--transition);
}

.back-link:hover {
    opacity: 1;
}

.session-timer {
    font-size: 1.1rem;
    color: var(--rose);
    font-weight: 500;
    opacity: 0;
    transition: opacity var(--transition);
}

.session-timer.visible {
    opacity: 1;
}

/* Screens */
.screen {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
    z-index: 10;
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

/* Title Screen */
.title-content {
    text-align: center;
    padding: 20px;
    max-width: 420px;
}

.hearts-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    gap: 5px;
}

.heart {
    animation: beat 1.5s ease-in-out infinite;
}

.heart.h1 {
    color: var(--rose);
}

.heart.h2 {
    color: var(--amber);
    animation-delay: 0.3s;
}

@keyframes beat {
    0%, 100% { transform: scale(1); }
    15% { transform: scale(1.15); }
    30% { transform: scale(1); }
}

.title {
    font-size: 4rem;
    font-weight: 200;
    letter-spacing: 0.15em;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--rose) 0%, var(--amber) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1rem;
    color: var(--rose);
    text-transform: uppercase;
    letter-spacing: 0.25em;
    margin-bottom: 15px;
    font-weight: 300;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 35px;
    font-weight: 300;
}

/* Instructions Preview */
.instructions-preview {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 30px;
    text-align: left;
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.instruction-item:not(:last-child) {
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.step {
    width: 28px;
    height: 28px;
    background: var(--rose-glow);
    color: var(--rose);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Buttons */
.start-btn, .continue-btn {
    background: linear-gradient(135deg, var(--rose) 0%, var(--amber) 100%);
    color: var(--bg-deep);
    border: none;
    padding: 18px 50px;
    border-radius: var(--radius-full);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    margin-bottom: 15px;
}

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

.time-note {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Setup Screen */
.setup-content {
    text-align: center;
    padding: 20px;
    max-width: 400px;
}

.setup-title {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 40px;
}

.setup-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
}

.setup-step {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px 20px;
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-md);
    opacity: 0.4;
    transform: translateX(-20px);
    transition: all 0.5s ease;
}

.setup-step.active {
    opacity: 1;
    transform: translateX(0);
    background: rgba(255,255,255,0.08);
}

.step-icon {
    font-size: 1.8rem;
}

.setup-step p {
    text-align: left;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Sync Screen */
.sync-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px 40px;
    position: relative;
}

/* Phase Header */
.phase-header {
    text-align: center;
    margin-bottom: 40px;
    transition: opacity var(--transition);
}

.phase-title {
    font-size: 1.8rem;
    font-weight: 300;
    margin-bottom: 10px;
}

.phase-instruction {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Orbs Container */
.orbs-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    flex: 1;
    max-height: 400px;
}

/* Person Orb */
.person-orb {
    position: relative;
    width: 140px;
    height: 140px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.orb-glow {
    position: absolute;
    width: 200%;
    height: 200%;
    border-radius: 50%;
    opacity: 0.3;
    transition: all 0.5s ease;
}

#orb1 .orb-glow {
    background: radial-gradient(circle, var(--rose-glow) 0%, transparent 70%);
}

#orb2 .orb-glow {
    background: radial-gradient(circle, var(--amber-glow) 0%, transparent 70%);
}

.orb-core {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    transition: all 0.8s ease;
    position: relative;
    z-index: 2;
}

#orb1 .orb-core {
    background: radial-gradient(circle at 30% 30%, var(--rose-light) 0%, var(--rose) 100%);
    box-shadow: 0 0 30px var(--rose-glow);
}

#orb2 .orb-core {
    background: radial-gradient(circle at 30% 30%, #ffc285 0%, var(--amber) 100%);
    box-shadow: 0 0 30px var(--amber-glow);
}

.orb-ring {
    position: absolute;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.2);
    opacity: 0;
    transition: all 0.3s ease;
}

/* Orb States */
.person-orb.inhale .orb-core {
    transform: scale(1.3);
}

.person-orb.exhale .orb-core {
    transform: scale(0.85);
}

.person-orb.inhale .orb-glow {
    opacity: 0.6;
    transform: scale(1.2);
}

.person-orb.active .orb-ring {
    opacity: 1;
    animation: ring-pulse 2s ease-out infinite;
}

@keyframes ring-pulse {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.5); opacity: 0; }
}

.orb-label {
    position: absolute;
    bottom: -30px;
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.orb-state {
    position: absolute;
    bottom: -50px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Connection Line */
.connection-line {
    width: 80px;
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-full);
    position: relative;
    transition: all var(--transition);
}

.connection-line.synced {
    background: var(--synced);
    box-shadow: 0 0 20px var(--synced-glow);
}

.sync-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    white-space: nowrap;
}

.sync-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-deep);
    padding: 5px 12px;
    border-radius: var(--radius-full);
    opacity: 0;
    transition: opacity var(--transition);
}

.connection-line.synced .sync-text {
    opacity: 1;
    color: var(--synced);
}

/* Shared Breath */
.shared-breath {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    pointer-events: none;
}

.shared-breath.active {
    opacity: 1;
    visibility: visible;
}

.shared-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--rose-glow) 0%, var(--amber-glow) 100%);
    margin: 0 auto 20px;
    transition: transform 4s ease-in-out;
}

.shared-breath.inhale .shared-circle {
    transform: scale(1.4);
}

.shared-breath.exhale .shared-circle {
    transform: scale(0.8);
}

.shared-text {
    font-size: 1.2rem;
    color: var(--text-primary);
    font-weight: 300;
    letter-spacing: 0.1em;
}

/* Touch Prompt */
.touch-prompt {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.touch-prompt.visible {
    opacity: 1;
}

.prompt-text {
    color: var(--text-secondary);
    font-size: 1rem;
    font-style: italic;
}

/* Completion Screen */
.complete-content {
    text-align: center;
    padding: 20px;
    max-width: 400px;
}

.complete-hearts {
    margin-bottom: 20px;
}

.heart-merged {
    font-size: 4rem;
    background: linear-gradient(135deg, var(--rose) 0%, var(--amber) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse-heart 2s ease-in-out infinite;
}

@keyframes pulse-heart {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.complete-title {
    font-size: 2.5rem;
    font-weight: 200;
    margin-bottom: 15px;
}

.complete-message {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

/* Session Summary */
.session-summary {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
    padding: 25px;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
}

.summary-stat {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 300;
    color: var(--rose);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Complete Prompt */
.complete-prompt {
    margin-bottom: 30px;
    color: var(--text-secondary);
}

.prompt-action {
    color: var(--text-primary);
    font-weight: 500;
    margin-top: 5px;
}

/* Complete Actions */
.complete-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn {
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--rose) 0%, var(--amber) 100%);
    color: var(--bg-deep);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--rose-glow);
}

.btn-secondary {
    background: rgba(255,255,255,0.1);
    color: var(--text-primary);
    border: 1px solid rgba(255,255,255,0.2);
}

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

/* Responsive - Portrait Mode */
@media (max-width: 600px) {
    .title {
        font-size: 3rem;
    }
    
    .orbs-container {
        flex-direction: column;
        gap: 20px;
    }
    
    .connection-line {
        width: 4px;
        height: 60px;
    }
    
    .person-orb {
        width: 120px;
        height: 120px;
    }
    
    .orb-core {
        width: 80px;
        height: 80px;
    }
    
    .orb-ring {
        width: 100px;
        height: 100px;
    }
    
    .complete-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .session-summary {
        gap: 25px;
    }
}

/* Synced State - Both orbs */
.game-container.synced .orb-core {
    background: radial-gradient(circle at 30% 30%, 
        var(--synced) 0%, 
        #7dd3b0 100%) !important;
    box-shadow: 0 0 40px var(--synced-glow) !important;
}

.game-container.synced .connection-line {
    background: var(--synced);
    box-shadow: 0 0 20px var(--synced-glow);
}