:root {
    --bg-color: #fef4e8;
    --surface-color: rgba(255, 255, 255, 0.94);
    --primary: #ff6b35;
    --primary-glow: rgba(255, 107, 53, 0.35);
    --accent: #0ea5a0;
    --text-main: #1f2933;
    --text-dim: #5f6b6b;
    --border-color: rgba(14, 165, 160, 0.25);
    --font-mono: "Courier New", monospace;
    --font-sans: "Trebuchet MS", "Verdana", sans-serif;
    --font-display: "Impact", "Trebuchet MS", sans-serif;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --surface-color: rgba(15, 23, 42, 0.92);
    --primary: #fb923c;
    --primary-glow: rgba(251, 146, 60, 0.4);
    --accent: #2dd4bf;
    --text-main: #f8fafc;
    --text-dim: #cbd5f5;
    --border-color: rgba(148, 163, 184, 0.25);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 24px;
    background: radial-gradient(circle at 10% 15%, rgba(255, 107, 53, 0.15), transparent 40%),
        radial-gradient(circle at 85% 10%, rgba(14, 165, 160, 0.15), transparent 45%),
        var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-sans);
    display: flex;
    justify-content: center;
    min-height: 100vh;
    user-select: none;
}

.app-container {
    width: 100%;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.header {
    text-align: center;
}

.title {
    font-family: var(--font-display);
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.subtitle {
    color: var(--text-dim);
}

.header-stats {
    display: grid;
    grid-template-columns: 1fr 1.2fr 1fr;
    gap: 15px;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 20px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
}

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

.stat-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-dim);
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
}

.stat-item.highlight {
    border-radius: 16px;
    padding: 10px;
    background: rgba(255, 107, 53, 0.08);
}

.stat-item.highlight .stat-value {
    color: var(--primary);
    font-size: 2.4rem;
    text-shadow: 0 0 16px var(--primary-glow);
}

.progress-container {
    height: 8px;
    background: rgba(14, 165, 160, 0.18);
    border-radius: 999px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--primary);
    width: 100%;
    transition: width 0.1s linear;
    box-shadow: 0 0 12px var(--primary-glow);
}

.click-area {
    flex: 1;
    min-height: 320px;
    background: linear-gradient(140deg, rgba(255, 255, 255, 0.9), rgba(255, 235, 221, 0.85));
    border-radius: 28px;
    border: 2px solid rgba(255, 107, 53, 0.2);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.08s, border-color 0.2s, box-shadow 0.3s, background 0.4s;
    box-shadow: inset 0 0 20px rgba(255, 107, 53, 0.12);
    touch-action: manipulation;
}

.click-area.active-test {
    animation: pulseGlow 1.2s ease-in-out infinite;
    border-color: var(--primary);
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: inset 0 0 20px rgba(255, 107, 53, 0.12), 0 0 15px var(--primary-glow); }
    50% { box-shadow: inset 0 0 20px rgba(255, 107, 53, 0.12), 0 0 30px var(--primary-glow), 0 0 50px rgba(255, 107, 53, 0.1); }
}

[data-theme="dark"] .click-area {
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(10, 14, 22, 0.9));
    border-color: rgba(251, 146, 60, 0.3);
}

.click-area:active {
    transform: scale(0.98);
    border-color: var(--primary);
}

.click-content {
    text-align: center;
    pointer-events: none;
    z-index: 2;
}

.click-icon {
    font-size: 3rem;
    margin-bottom: 10px;
    opacity: 0.7;
}

.click-msg {
    font-size: 2rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.click-submsg {
    color: var(--text-dim);
    margin-top: 5px;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.6) 0%, rgba(255, 107, 53, 0) 70%);
    transform: scale(0);
    animation: ripple-anim 0.4s ease-out;
    pointer-events: none;
}

@keyframes ripple-anim {
    to {
        transform: scale(2.5);
        opacity: 0;
    }
}

.settings-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    background: var(--surface-color);
    padding: 16px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
}

.settings-bar span {
    color: var(--text-dim);
    font-size: 0.9rem;
    font-weight: 600;
}

.duration-selector {
    display: flex;
    gap: 6px;
}

.dur-btn {
    background: transparent;
    border: 1.5px solid transparent;
    color: var(--text-dim);
    padding: 8px 14px;
    border-radius: 12px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s;
}

.dur-btn:hover {
    color: var(--text-main);
    background: rgba(255, 107, 53, 0.1);
}

.dur-btn.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 0 12px var(--primary-glow);
    border-color: var(--primary);
    transform: scale(1.05);
}

.dur-btn:not(.active):hover {
    border-color: var(--border-color);
}

.custom-duration {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.custom-duration input {
    width: 70px;
    padding: 6px 8px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: inherit;
    font-family: var(--font-mono);
}

.records {
    display: grid;
    gap: 16px;
}

.record-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.mini-card {
    background: var(--surface-color);
    border-radius: 16px;
    padding: 14px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.mini-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.1);
}

.mini-card.updated {
    transform: scale(1.04);
    box-shadow: 0 0 12px var(--primary-glow);
}

.mini-value {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    display: block;
    margin: 6px 0;
    transition: color 0.3s ease;
}

.mini-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.mini-sub {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.history-panel {
    background: var(--surface-color);
    border-radius: 20px;
    padding: 16px;
    border: 1px solid var(--border-color);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.ghost-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 6px 12px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.85rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.history-row {
    padding: 8px 10px;
    border-radius: 12px;
    background: rgba(14, 165, 160, 0.08);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.history-empty {
    color: var(--text-dim);
    text-align: center;
    padding: 10px 0;
}

.result-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.65);
    backdrop-filter: blur(6px);
    z-index: 100;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--surface-color);
    width: 90%;
    max-width: 420px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    background: rgba(255, 107, 53, 0.12);
    padding: 16px;
    text-align: center;
    font-family: var(--font-display);
}

.modal-body {
    padding: 20px;
    text-align: center;
}

.result-big {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-bottom: 10px;
}

.result-cps-label {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--text-dim);
}

.result-detail {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 0.95rem;
}

.rank-badge {
    margin-top: 14px;
    padding: 10px 18px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(14, 165, 160, 0.18), rgba(255, 107, 53, 0.12));
    color: var(--text-main);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.5px;
    border: 1px solid var(--border-color);
    animation: badgePop 0.4s ease 0.3s both;
}

@keyframes badgePop {
    0% { transform: scale(0.7); opacity: 0; }
    60% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

.modal-confetti {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    animation: confettiFall 1s ease-out forwards;
    pointer-events: none;
}

@keyframes confettiFall {
    0% { transform: translateY(0) rotate(0deg); opacity: 1; }
    100% { transform: translateY(120px) rotate(360deg); opacity: 0; }
}

.modal-footer {
    padding: 16px;
    display: flex;
    justify-content: center;
}

.primary-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.3);
    transition: transform 0.15s, box-shadow 0.15s;
}

.primary-btn:hover {
    transform: scale(1.04);
    box-shadow: 0 10px 24px rgba(255, 107, 53, 0.4);
}

.primary-btn:active {
    transform: scale(0.97);
}

.hint {
    color: var(--text-dim);
    text-align: center;
    font-size: 0.9rem;
}

.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 10px 12px;
    border-radius: 999px;
    cursor: pointer;
}

[data-theme="dark"] .settings-bar {
    background: var(--surface-color);
    border-color: var(--border-color);
}

/* Settings bar toggle buttons */
.settings-divider {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    flex-shrink: 0;
}

.toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: 1.5px solid transparent;
    color: var(--text-dim);
    padding: 7px 12px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s;
    white-space: nowrap;
}

.toggle-btn:hover {
    background: rgba(255, 107, 53, 0.08);
    color: var(--text-main);
}

.toggle-btn[aria-pressed="true"] {
    background: rgba(14, 165, 160, 0.15);
    color: var(--accent);
    border-color: var(--accent);
}

.toggle-icon {
    font-size: 1rem;
}

/* Challenge bar */
.challenge-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface-color);
    padding: 12px 20px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.challenge-bar span {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dim);
    white-space: nowrap;
}

.challenge-bar input {
    width: 70px;
    padding: 6px 8px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: inherit;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.challenge-gauge {
    flex: 1;
    min-width: 120px;
    height: 24px;
    background: rgba(14, 165, 160, 0.1);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.gauge-fill {
    height: 100%;
    width: 0%;
    border-radius: 12px;
    transition: width 0.15s, background 0.3s;
    background: var(--accent);
}

.gauge-target {
    position: absolute;
    top: 0;
    width: 3px;
    height: 100%;
    background: var(--primary);
    border-radius: 2px;
    left: 50%;
    box-shadow: 0 0 6px var(--primary-glow);
}

.gauge-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-main);
    pointer-events: none;
}

/* CPS Trend */
.trend-section {
    background: var(--surface-color);
    border-radius: 16px;
    padding: 14px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.trend-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    display: block;
    margin-bottom: 8px;
}

#trend-chart {
    width: 100%;
    max-width: 320px;
    height: 60px;
    display: block;
    margin: 0 auto;
}

/* Achievements / Badges */
.badges-section {
    background: var(--surface-color);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.badges-toggle {
    width: 100%;
    background: transparent;
    border: none;
    padding: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    color: var(--text-main);
    font-size: 0.95rem;
    font-weight: 600;
}

.badges-arrow {
    transition: transform 0.25s;
    font-size: 0.75rem;
    color: var(--text-dim);
}

.badges-toggle[aria-expanded="true"] .badges-arrow {
    transform: rotate(180deg);
}

.badges-grid {
    display: none;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
    padding: 0 14px 14px;
}

.badges-grid.open {
    display: grid;
}

.badge-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 6px;
    border-radius: 12px;
    background: rgba(14, 165, 160, 0.06);
    border: 1px solid transparent;
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
}

.badge-item:hover {
    transform: translateY(-1px);
}

.badge-item.unlocked {
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(14, 165, 160, 0.2);
}

.badge-item.unlocked .badge-icon {
    filter: none;
}

.badge-item.locked {
    opacity: 0.5;
    filter: grayscale(0.6);
}

.badge-item.locked .badge-icon::after {
    content: '?';
    position: absolute;
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--text-dim);
}

.badge-icon {
    font-size: 1.6rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.badge-name {
    font-size: 0.7rem;
    font-weight: 700;
    text-align: center;
    color: var(--text-main);
}

.badge-desc {
    font-size: 0.6rem;
    color: var(--text-dim);
    text-align: center;
    line-height: 1.2;
}

/* Particle burst */
.click-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    pointer-events: none;
    animation: particleBurst 0.5s ease-out forwards;
}

@keyframes particleBurst {
    0% { transform: translate(0, 0) scale(1); opacity: 1; }
    100% { opacity: 0; }
}

/* CPS color classes for click area */
.click-area.cps-green {
    border-color: #22c55e;
    box-shadow: inset 0 0 20px rgba(34, 197, 94, 0.15), 0 0 15px rgba(34, 197, 94, 0.2);
}

.click-area.cps-yellow {
    border-color: #eab308;
    box-shadow: inset 0 0 20px rgba(234, 179, 8, 0.15), 0 0 15px rgba(234, 179, 8, 0.2);
}

.click-area.cps-orange {
    border-color: #f97316;
    box-shadow: inset 0 0 20px rgba(249, 115, 22, 0.15), 0 0 15px rgba(249, 115, 22, 0.2);
}

.click-area.cps-red {
    border-color: #ef4444;
    box-shadow: inset 0 0 20px rgba(239, 68, 68, 0.15), 0 0 15px rgba(239, 68, 68, 0.2);
}

/* Animated CPS count-up in modal */
.result-cps-val {
    font-family: var(--font-mono);
    font-size: 2.6rem;
    color: var(--primary);
    transition: color 0.3s;
}

/* Challenge result */
.challenge-result {
    color: var(--accent);
}

@media (max-width: 640px) {
    body {
        padding: 16px;
    }

    .click-area {
        min-height: 220px;
    }

    .header-stats {
        grid-template-columns: 1fr;
    }

    .settings-bar {
        border-radius: 20px;
        padding: 12px;
        gap: 10px;
    }

    .settings-divider {
        width: 100%;
        height: 1px;
    }

    .record-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .result-detail {
        flex-direction: column;
        gap: 6px;
        align-items: center;
    }

    .badges-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .challenge-bar {
        border-radius: 16px;
    }

    .challenge-gauge {
        min-width: 80px;
    }
}

/* Focus visible styles for keyboard navigation */
button:focus-visible,
input:focus-visible,
.click-area:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.dur-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.2);
}

/* Prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
    .ripple,
    .modal-confetti {
        animation: none;
    }

    @keyframes slideUp {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    .click-area,
    .click-area.active-test {
        transition: none;
        animation: none;
    }

    .mini-card {
        transition: none;
    }

    .rank-badge {
        animation: none;
    }
}

/* Dark theme completions */
[data-theme="dark"] .result-modal {
    background: rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] .modal-header {
    background: rgba(251, 146, 60, 0.15);
}