/* ============================================
   Focus — Study Session Reset
   Clean, precise, target-focused aesthetic
   ============================================ */

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

:root {
    --bg-dark: #0a0a0f;
    --bg-mid: #12121a;
    --bg-card: #1a1a24;
    --yellow: #ffd93d;
    --yellow-dim: rgba(255, 217, 61, 0.15);
    --yellow-glow: rgba(255, 217, 61, 0.4);
    --green: #6bcb77;
    --green-dim: rgba(107, 203, 119, 0.15);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --grid-color: rgba(255, 217, 61, 0.03);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --transition: 0.3s ease;
}

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

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

/* Background Grid */
.bg-grid {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.grid-lines {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 40px 40px;
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    from { transform: translate(0, 0); }
    to { transform: translate(40px, 40px); }
}

.glow-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--yellow-dim) 0%, transparent 70%);
    opacity: 0.5;
}

/* Navigation */
.game-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.5rem;
    opacity: 0.7;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-full);
    transition: opacity var(--transition);
}

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

.timer {
    font-size: 1rem;
    color: var(--yellow);
    font-weight: 500;
    opacity: 0;
    transition: opacity var(--transition);
}

.timer.visible {
    opacity: 1;
}

/* Screens */
.screen {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    z-index: 10;
    padding: 20px;
}

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

/* Title Screen */
.title-content {
    text-align: center;
    max-width: 320px;
}

.target-icon {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.target-rings {
    position: absolute;
    width: 100%;
    height: 100%;
}

.ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 2px solid var(--yellow);
    opacity: 0.3;
}

.ring.r1 { width: 40px; height: 40px; animation: ring-pulse 2s ease-out infinite; }
.ring.r2 { width: 70px; height: 70px; animation: ring-pulse 2s ease-out infinite 0.3s; }
.ring.r3 { width: 100px; height: 100px; animation: ring-pulse 2s ease-out infinite 0.6s; }

@keyframes ring-pulse {
    0% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(1.3); }
}

.target-dot {
    width: 20px;
    height: 20px;
    background: var(--yellow);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--yellow-glow);
    z-index: 2;
}

.title {
    font-size: 4rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    color: var(--yellow);
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.start-btn {
    background: var(--yellow);
    color: var(--bg-dark);
    border: none;
    padding: 16px 48px;
    border-radius: var(--radius-full);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    margin-bottom: 16px;
}

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

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

/* Check Screen */
.check-content {
    text-align: center;
    max-width: 360px;
    width: 100%;
}

.question {
    font-size: 1.6rem;
    font-weight: 500;
    margin-bottom: 40px;
}

.slider-container {
    margin-bottom: 40px;
}

.focus-slider {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    outline: none;
    margin-bottom: 12px;
}

.focus-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 28px;
    height: 28px;
    background: var(--yellow);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--yellow-glow);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.slider-value {
    font-size: 3.5rem;
    font-weight: 300;
    color: var(--yellow);
}

.continue-btn {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--yellow);
    padding: 14px 36px;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.continue-btn:hover {
    background: var(--yellow);
    color: var(--bg-dark);
}

/* Phase Screens Common */
.phase-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.phase-title {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--yellow);
}

.phase-desc {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* Brain Dump Screen */
.dump-content {
    text-align: center;
    max-width: 360px;
}

.thoughts-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 30px;
}

.thought-bubble {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-secondary);
    padding: 12px 20px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition);
}

.thought-bubble:hover {
    border-color: var(--yellow);
}

.thought-bubble.dismissed {
    opacity: 0.3;
    transform: scale(0.9);
    text-decoration: line-through;
    border-color: var(--green);
    color: var(--green);
}

.dump-progress {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Focus Breathing Screen */
.breathe-content {
    text-align: center;
}

.focus-circle-container {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 30px;
}

.focus-circle {
    width: 100%;
    height: 100%;
    border: 3px solid var(--yellow);
    border-radius: 50%;
    position: relative;
    opacity: 0.5;
}

.focus-dot {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--yellow);
    border-radius: 50%;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 15px var(--yellow-glow);
    animation: orbit 8s linear infinite;
}

@keyframes orbit {
    from { transform: translateX(-50%) rotate(0deg) translateY(100px) rotate(0deg); }
    to { transform: translateX(-50%) rotate(360deg) translateY(100px) rotate(-360deg); }
}

.breath-text {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-top: 20px;
}

.breath-count {
    color: var(--text-muted);
    font-size: 1rem;
    margin-top: 15px;
}

.count-current {
    color: var(--yellow);
    font-weight: 600;
}

/* Attention Training Screen */
.attention-content {
    text-align: center;
    max-width: 400px;
}

.attention-field {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.center-target {
    width: 60px;
    height: 60px;
    border: 3px solid var(--yellow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.target-core {
    width: 20px;
    height: 20px;
    background: var(--yellow);
    border-radius: 50%;
    animation: core-pulse 2s ease-in-out infinite;
}

@keyframes core-pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(0.8); opacity: 0.7; }
}

.distraction {
    position: absolute;
    font-size: 1.5rem;
    opacity: 0.4;
    animation: float-distract 3s ease-in-out infinite;
}

.distraction.d1 { top: 20px; left: 30px; animation-delay: 0s; }
.distraction.d2 { top: 40px; right: 20px; animation-delay: 0.5s; }
.distraction.d3 { bottom: 40px; left: 20px; animation-delay: 1s; }
.distraction.d4 { bottom: 20px; right: 40px; animation-delay: 1.5s; }

@keyframes float-distract {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(10px, 10px); }
}

.attention-timer {
    width: 200px;
    height: 6px;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    margin: 0 auto 10px;
    overflow: hidden;
}

.timer-fill {
    height: 100%;
    background: var(--yellow);
    border-radius: var(--radius-full);
    width: 100%;
    transition: width 1s linear;
}

.attention-time {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Intention Screen */
.intention-content {
    text-align: center;
    max-width: 360px;
}

.intention-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 30px;
}

.intention-btn {
    background: var(--bg-card);
    border: 2px solid transparent;
    color: var(--text-secondary);
    padding: 16px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
}

.intention-btn:hover {
    border-color: var(--yellow);
}

.intention-btn.selected {
    border-color: var(--yellow);
    background: var(--yellow-dim);
    color: var(--text-primary);
}

.time-select {
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    margin-top: 20px;
}

.time-select.visible {
    opacity: 1;
    visibility: visible;
}

.time-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.time-options {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.time-btn {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition);
}

.time-btn:hover, .time-btn.active {
    border-color: var(--yellow);
    color: var(--yellow);
}

/* Launch Screen */
.launch-content {
    text-align: center;
}

.launch-target {
    position: relative;
    width: 150px;
    height: 150px;
    margin: 0 auto 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.launch-rings {
    position: absolute;
    width: 100%;
    height: 100%;
}

.launch-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 2px solid var(--green);
    animation: launch-pulse 1s ease-out infinite;
}

.launch-ring.r1 { width: 80px; height: 80px; }
.launch-ring.r2 { width: 115px; height: 115px; animation-delay: 0.2s; }
.launch-ring.r3 { width: 150px; height: 150px; animation-delay: 0.4s; }

@keyframes launch-pulse {
    0% { opacity: 0.8; transform: translate(-50%, -50%) scale(0.9); }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(1.1); }
}

.launch-countdown {
    font-size: 3.5rem;
    font-weight: 600;
    color: var(--green);
    z-index: 2;
}

.launch-title {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 10px;
    color: var(--green);
}

.launch-task {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Complete Screen */
.complete-content {
    text-align: center;
    max-width: 320px;
}

.complete-icon {
    font-size: 4rem;
    margin-bottom: 15px;
}

.complete-title {
    font-size: 2.5rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--green);
}

.complete-message {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.focus-stats {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 25px;
}

.stat {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 8px;
}

.stat-before {
    font-size: 2rem;
    color: #f87171;
    font-weight: 500;
}

.stat-arrow {
    color: var(--text-muted);
    font-size: 1.5rem;
}

.stat-after {
    font-size: 2rem;
    color: var(--green);
    font-weight: 500;
}

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

.session-info {
    background: var(--yellow-dim);
    border-radius: var(--radius-md);
    padding: 15px;
    margin-bottom: 25px;
}

.session-task {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 5px;
}

.session-time {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.complete-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-primary {
    background: var(--green);
    color: var(--bg-dark);
    border: none;
    padding: 16px 36px;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(107, 203, 119, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 12px;
    font-size: 0.95rem;
    cursor: pointer;
}

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

/* Responsive */
@media (max-width: 380px) {
    .title {
        font-size: 3rem;
    }
    
    .intention-options {
        grid-template-columns: 1fr;
    }
    
    .attention-field {
        width: 240px;
        height: 240px;
    }
    
    .focus-circle-container {
        width: 160px;
        height: 160px;
    }
}