* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #1a1a2e;
    color: #eee;
    min-height: 100vh;
    padding: 20px;
}
.app-container {
    max-width: 600px;
    margin: 0 auto;
    background: #16213e;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    overflow: hidden;
}
.all-projects-btn {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 100;
    background: #e94560;
    border: none;
    border-radius: 8px;
    padding: 8px 14px;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}
.all-projects-btn:hover {
    background: #c73650;
    transform: scale(1.05);
}
.screen {
    display: none;
    padding: 30px 20px;
}
.screen.active {
    display: block;
}
/* Points Section */
.points-section {
    text-align: center;
    padding: 20px;
    background: #1a1a2e;
    border-radius: 12px;
    margin-bottom: 30px;
    border: 2px solid #e94560;
}
.points-label {
    font-size: 14px;
    font-weight: 600;
    color: #aaa;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.points-value {
    font-size: 48px;
    font-weight: 700;
    color: #e94560;
}
.points-value.points-bump,
.total-value.points-bump {
    animation: points-pop 0.15s ease-out;
}
@keyframes points-pop {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.5);
        color: #ffd700;
        text-shadow: 0 0 12px rgba(255, 215, 0, 0.8);
    }
    100% {
        transform: scale(1);
    }
}
/* Section Titles */
.section-title {
    font-size: 20px;
    font-weight: 700;
    color: #eee;
    margin: 30px 0 15px 0;
}
/* Duration Buttons */
.duration-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.duration-btn {
    background: #16213e;
    border: 2px solid #0f3460;
    border-radius: 12px;
    padding: 18px 10px;
    color: #eee;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}
.duration-btn:hover,
.duration-btn.selected {
    border-color: #e94560;
    background: #e94560;
}
.duration-btn .duration {
    font-size: 16px;
    font-weight: 700;
}
.duration-btn .price {
    font-size: 12px;
    font-weight: 400;
    color: #ccc;
}
.duration-btn.selected .price {
    color: #fff;
}
/* Custom Massage */
.custom-massage {
    background: #16213e;
    border: 2px solid #0f3460;
    border-radius: 12px;
    padding: 18px;
    margin-bottom: 20px;
}
.custom-display {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: #4ecca3;
    margin-bottom: 15px;
    font-variant-numeric: tabular-nums;
}
#custom-slider {
    width: 100%;
    height: 6px;
    background: #0f3460;
    outline: none;
    -webkit-appearance: none;
    margin-bottom: 15px;
    accent-color: #4ecca3;
    cursor: pointer;
}
#custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: #4ecca3;
    cursor: pointer;
    border-radius: 50%;
}
#custom-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: #4ecca3;
    cursor: pointer;
    border: none;
    border-radius: 50%;
}
.custom-start-btn {
    width: 100%;
    background: #e94560;
    border: none;
    border-radius: 10px;
    padding: 14px 24px;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.custom-start-btn:hover {
    background: #c73650;
}
/* Free Massages */
.free-massages {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}
.free-btn {
    background: #16213e;
    border: 2px solid #0f3460;
    border-radius: 12px;
    padding: 18px 10px;
    color: #eee;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}
.free-btn:hover:not(:disabled) {
    border-color: #4ecca3;
    background: #4ecca3;
    color: #1a1a2e;
}
.free-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.free-btn .free-duration {
    font-size: 15px;
    font-weight: 700;
}
.free-btn .free-points {
    font-size: 12px;
    font-weight: 400;
    color: #aaa;
}
.free-btn.locked {
    border-color: #0f3460;
    color: #aaa;
}
.free-btn.unlocked {
    border-color: #4ecca3;
    color: #4ecca3;
}
/* History Section */
.history-section {
    background: #16213e;
    border: 2px solid #0f3460;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
}
.history-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.history-item {
    background: #1a1a2e;
    border-radius: 8px;
    padding: 12px;
}
.history-date {
    font-size: 12px;
    color: #aaa;
    margin-bottom: 5px;
}
.history-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 5px;
}
.history-duration {
    font-weight: 600;
    color: #eee;
}
.history-amount {
    font-weight: 700;
    color: #4ecca3;
}
.history-points {
    font-weight: 600;
    color: #e94560;
}
.history-empty {
    text-align: center;
    color: #aaa;
    font-style: italic;
    padding: 20px;
}
/* Clear All Data Button */
.clear-all-btn {
    width: 100%;
    background: transparent;
    border: 2px solid #e94560;
    border-radius: 10px;
    padding: 14px 24px;
    color: #e94560;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.2s;
}
.clear-all-btn:hover {
    background: #e94560;
    color: #fff;
}
/* Totals Section */
.totals-section {
    background: #16213e;
    border: 2px solid #0f3460;
    border-radius: 12px;
    padding: 20px;
    color: #eee;
}
.total-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid #0f3460;
}
.total-item:last-child {
    border-bottom: none;
}
.total-label {
    font-size: 14px;
    font-weight: 500;
    color: #aaa;
}
.total-value {
    font-size: 16px;
    font-weight: 700;
    color: #4ecca3;
}
/* Session Setup Screen */
.back-btn {
    background: transparent;
    border: 2px solid #e94560;
    border-radius: 10px;
    padding: 10px 20px;
    color: #e94560;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    margin-bottom: 20px;
    transition: all 0.2s;
}
.back-btn:hover {
    background: #e94560;
    color: #fff;
}
.session-setup-content {
    text-align: center;
}
.session-setup-title {
    font-size: 28px;
    font-weight: 700;
    color: #e94560;
    margin-bottom: 30px;
}
.session-setup-details {
    margin-bottom: 30px;
}
.session-duration {
    font-size: 48px;
    font-weight: 700;
    color: #4ecca3;
    margin-bottom: 10px;
}
.session-price {
    font-size: 36px;
    font-weight: 700;
    color: #e94560;
}
.start-session-btn {
    background: #e94560;
    border: none;
    border-radius: 10px;
    padding: 16px 32px;
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.start-session-btn:hover {
    background: #c73650;
}
/* Active Session Screen */
.active-session-content {
    text-align: center;
}
.session-info {
    margin-bottom: 20px;
}
.session-label {
    font-size: 14px;
    color: #aaa;
    margin-bottom: 5px;
}
.session-value {
    font-size: 24px;
    font-weight: 700;
    color: #eee;
}
.timer-message {
    font-size: 32px;
    font-weight: 700;
    color: #4ecca3;
    margin: 40px 0;
    text-align: center;
}
.finish-session-btn {
    background: #ff4444;
    border: none;
    border-radius: 10px;
    padding: 16px 32px;
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.finish-session-btn:hover {
    background: #cc0000;
}
/* Payment Screen */
.payment-content {
    text-align: center;
    background: #16213e;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.payment-title {
    font-size: 28px;
    font-weight: 700;
    color: #e94560;
    margin-bottom: 20px;
}
.payment-instruction {
    font-size: 14px;
    color: #ccc;
    margin-bottom: 30px;
    line-height: 1.5;
}
.points-needed {
    font-size: 32px;
    font-weight: 700;
    color: #e94560;
    margin: -10px 0 30px 0;
}
.password-input-container {
    margin-bottom: 20px;
}
.password-input-container label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #aaa;
    margin-bottom: 8px;
    text-align: left;
}
#password-input {
    width: 100%;
    padding: 14px 16px;
    border-radius: 10px;
    border: 2px solid #0f3460;
    background: #1a1a2e;
    color: #eee;
    font-size: 16px;
    outline: none;
}
#password-input:focus {
    border-color: #e94560;
}
.confirm-payment-btn {
    background: #e94560;
    border: none;
    border-radius: 10px;
    padding: 14px 24px;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.confirm-payment-btn:hover {
    background: #c73650;
}
.payment-error {
    color: #ff6b6b;
    font-size: 14px;
    font-weight: 600;
    margin-top: 15px;
    min-height: 20px;
}
/* Success Screen */
.success-content {
    text-align: center;
    padding: 40px 20px;
}
.success-icon {
    font-size: 80px;
    color: #4ecca3;
    margin-bottom: 20px;
}
.success-message {
    font-size: 24px;
    font-weight: 700;
    color: #4ecca3;
    margin-bottom: 30px;
    white-space: pre-line;
    line-height: 1.5;
}
.return-btn {
    background: #e94560;
    border: none;
    border-radius: 10px;
    padding: 14px 24px;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.return-btn:hover {
    background: #c73650;
}
/* Responsive Design */
@media (max-width: 480px) {
    .duration-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    .free-massages {
        grid-template-columns: repeat(2, 1fr);
    }
    .points-value {
        font-size: 36px;
    }
    .timer-message {
        font-size: 24px;
    }
    .session-duration {
        font-size: 36px;
    }
    .session-price {
        font-size: 28px;
    }
}
/* Free Session Setup Screen */
#free-session-setup-screen .session-setup-title {
    color: #4ecca3;
}
#free-session-setup-screen .start-session-btn {
    background: #4ecca3;
}
#free-session-setup-screen .start-session-btn:hover {
    background: #3eb892;
}
/* Hidden class */
.hidden {
    display: none !important;
}
/* Scrollbar Styling */
.history-section::-webkit-scrollbar {
    width: 8px;
}
.history-section::-webkit-scrollbar-track {
    background: #1a1a2e;
    border-radius: 4px;
}
.history-section::-webkit-scrollbar-thumb {
    background: #4ecca3;
    border-radius: 4px;
}
.history-section::-webkit-scrollbar-thumb:hover {
    background: #3eb892;
}

/* Focus States for Accessibility */
button:focus,
input:focus {
    outline: 2px solid #e94560;
    outline-offset: 2px;
}