* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: #f5f5f5;
}

/* Modal Overlay */
.session-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

    .session-modal-overlay.active {
        display: flex;
        align-items: center;
        justify-content: center;
    }

/* Modal Container */
.session-modal {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 440px;
    width: 90%;
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

/* Modal Header */
.session-modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 24px;
    color: white;
    text-align: center;
}

.session-modal-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    animation: pulse 2s ease infinite;
}

    .session-modal-icon svg {
        width: 32px;
        height: 32px;
        stroke: white;
        fill: none;
        stroke-width: 2;
    }

.session-modal-title {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 8px;
}

.session-modal-subtitle {
    font-size: 14px;
    opacity: 0.95;
    margin: 0;
}

/* Modal Body */
.session-modal-body {
    padding: 32px 24px;
    text-align: center;
}

.session-modal-message {
    color: #333;
    font-size: 16px;
    line-height: 1.6;
    margin: 0 0 24px;
}

/* Countdown Timer */
.session-countdown {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin: 24px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
}

.countdown-label {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}

.countdown-time {
    font-size: 32px;
    font-weight: 700;
    color: #667eea;
    font-variant-numeric: tabular-nums;
    min-width: 80px;
}

    .countdown-time.warning {
        color: #f59e0b;
    }

    .countdown-time.critical {
        color: #ef4444;
        animation: shake 0.5s ease;
    }

/* Progress Bar */
.session-progress {
    width: 100%;
    height: 4px;
    background: #e5e7eb;
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 24px;
}

.session-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
    transition: width 1s linear;
}

/* Modal Actions */
.session-modal-actions {
    display: flex;
    gap: 12px;
}

.session-btn {
    flex: 1;
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.session-btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

    .session-btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
    }

.session-btn-secondary {
    background: #f3f4f6;
    color: #6b7280;
}

    .session-btn-secondary:hover {
        background: #e5e7eb;
    }

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

    50% {
        transform: scale(1.05);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-4px);
    }

    75% {
        transform: translateX(4px);
    }
}