/* Modern CSS Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* CSS Variables for Dynamic Theming */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #4CAF50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --info-color: #2196F3;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #1a202c;
    --bg-card: #ffffff;
    
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-light: #ffffff;
    
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
}

/* Dark Mode Variables - High Contrast */
[data-theme="dark"] {
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-card: #2d3748;
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --border-color: #4a5568;
}

/* Enhanced dark mode contrast */
[data-theme="dark"] .program-card {
    background: #2d3748;
    border-color: #4a5568;
    color: #ffffff;
}

[data-theme="dark"] .program-name {
    color: #ffffff !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .program-description {
    color: #e2e8f0 !important;
}

[data-theme="dark"] .program-meta {
    color: #a0aec0 !important;
}

[data-theme="dark"] .control-label {
    color: #ffffff !important;
}

[data-theme="dark"] .control-help {
    color: #a0aec0 !important;
}

/* Base Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: #1a202c;
    background: #ffffff;
    transition: all 0.3s ease;
    margin: 0;
    padding: 0;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #ffffff;
    padding: 1rem 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: #ffffff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.hamburger-menu {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: #ffffff;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s ease;
    font-size: 1.5rem;
    margin-right: 1rem;
}

.hamburger-menu:hover {
    background: rgba(255, 255, 255, 0.3);
}

.home-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: #ffffff;
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s ease;
    font-size: 1.25rem;
}

.home-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: #ffffff;
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s ease;
    font-size: 1.5rem;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Hamburger Menu Panel */
.hamburger-menu-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px;
    height: 100vh;
    background: #ffffff;
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.2);
    z-index: 1001;
    overflow-y: auto;
}

.menu-header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #ffffff;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.menu-header h3 {
    color: #ffffff !important;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    font-weight: 600;
}

.menu-items {
    list-style: none;
    padding: 0;
    margin: 0;
}

.menu-items li {
    border-bottom: 1px solid #e2e8f0;
}

.menu-items a {
    display: block;
    padding: 1rem 1.5rem;
    color: #1a202c;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.2s ease;
}

.menu-items a:hover {
    background: #f8f9fa;
}

.menu-divider {
    height: 1px;
    background: #e2e8f0;
    margin: 0.5rem 0;
    border: none;
}

.menu-section-title {
    padding: 1rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: #718096;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: none;
}

[data-theme="dark"] .hamburger-menu-panel {
    background: #2d3748;
}

[data-theme="dark"] .menu-items a {
    color: #e2e8f0;
}

[data-theme="dark"] .menu-items a:hover {
    background: #1a202c;
}

[data-theme="dark"] .menu-divider {
    background: #4a5568;
}

[data-theme="dark"] .menu-section-title {
    color: #a0aec0;
}

/* Main Layout */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    min-height: calc(100vh - 80px);
}

/* Programs Section */
.programs-section {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.section-header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #ffffff;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #ffffff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.programs-list {
    padding: 1.5rem;
    max-height: 600px;
    overflow-y: auto;
}

.program-card {
    background: #f8f9fa;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    display: block;
    min-height: 150px;
    color: #1a202c;
}

.program-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.program-card.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
}

.program-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.program-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: #1a202c;
    display: block;
}

.program-duration {
    background: #667eea;
    color: #ffffff;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.program-description {
    color: #4a5568;
    margin-bottom: 1rem;
    line-height: 1.5;
    display: block;
}

.program-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: #718096;
}

.program-actions {
    display: flex;
    gap: 0.75rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #ffffff;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background: #f8f9fa;
    color: #1a202c;
    border: 1px solid #e2e8f0;
}

.btn-secondary:hover {
    background: #e2e8f0;
}

.btn-success {
    background: #4CAF50;
    color: #ffffff;
}

.btn-warning {
    background: #ff9800;
    color: #ffffff;
}

.btn-danger {
    background: #f44336;
    color: #ffffff;
}

/* Controls Section */
.controls-section {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    height: fit-content;
}

.control-group {
    padding: 1.5rem;
    border-bottom: 1px solid #e2e8f0;
}

.control-group:last-child {
    border-bottom: none;
}

.control-label {
    display: block;
    font-weight: 500;
    color: #1a202c;
    margin-bottom: 0.5rem;
}

.control-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    background: #ffffff;
    color: #1a202c;
    transition: border-color 0.3s ease;
}

.control-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.control-help {
    font-size: 0.875rem;
    color: #718096;
    margin-top: 0.5rem;
}

.control-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Execution View */
.execution-view {
    grid-column: 1 / -1;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    text-align: center;
}

/* Segmented Progress Bar */
.progress-segment {
    position: relative;
    transition: background 0.2s ease;
}

.progress-segment:hover {
    background: #a0aec0 !important;
}

.segmented-progress:hover .progress-segment {
    opacity: 0.8;
}

.segmented-progress .progress-segment:hover {
    opacity: 1;
}

.execution-header {
    margin-bottom: 2rem;
}

.execution-header h2 {
    font-size: 1.875rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 0.5rem;
}

.execution-header p {
    color: #4a5568;
    font-size: 1rem;
}

.exercise-display {
    margin: 3rem 0;
}

.exercise-display h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 1rem;
}

.timer {
    font-size: 4rem;
    font-weight: 700;
    color: #1a202c;
    margin: 2rem 0;
    font-family: 'Courier New', monospace;
}

#exercise-instructions {
    color: #4a5568;
    font-size: 1.125rem;
    max-width: 600px;
    margin: 1rem auto;
    line-height: 1.6;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: #e2e8f0;
    border-radius: 6px;
    overflow: hidden;
    margin: 2rem 0;
    border: 2px solid #cbd5e0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    transition: width 0.3s ease;
    width: 0%;
}

.exercise-info {
    color: #718096;
    font-size: 1rem;
    margin: 1rem 0;
}

.execution-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Breathing Cue Animations */
#breathing-cue {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Dark mode for execution view */
[data-theme="dark"] .execution-view {
    background: #2d3748;
}

[data-theme="dark"] .execution-header h2 {
    color: #ffffff;
}

[data-theme="dark"] .execution-header p {
    color: #e2e8f0;
}

[data-theme="dark"] .timer {
    color: #ffffff;
}

[data-theme="dark"] #exercise-instructions {
    color: #e2e8f0;
}

[data-theme="dark"] .progress-bar,
[data-theme="dark"] .exercise-progress-bar {
    background: #4a5568;
}

[data-theme="dark"] #breathing-cue {
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] #exercise-counter {
    color: #ffffff !important;
}

[data-theme="dark"] .exercise-info {
    color: #a0aec0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-container {
        grid-template-columns: 1fr;
        padding: 1rem;
        gap: 1rem;
    }
    
    .header-content {
        padding: 0 1rem;
    }
    
    .programs-list {
        max-height: 400px;
    }
    
    .exercise-display h1 {
        font-size: 2rem;
    }
    
    .timer {
        font-size: 3rem;
    }
    
    .execution-controls {
        flex-direction: column;
    }
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: #ffffff;
    border-radius: 16px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

.modal-header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #ffffff;
    padding: 1.5rem;
    border-radius: 16px 16px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
    color: #ffffff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.close-btn {
    background: none;
    border: none;
    color: #ffffff;
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background 0.2s ease;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    font-weight: 600;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: 2rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.settings-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #e2e8f0;
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.settings-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 1rem;
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    gap: 1rem;
}

.setting-item label {
    font-weight: 500;
    color: #1a202c;
    flex: 1;
}

.setting-item input[type="range"] {
    flex: 2;
    max-width: 200px;
}

.setting-item input[type="text"] {
    flex: 2;
    padding: 0.5rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 1rem;
    color: #1a202c;
}

.setting-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.setting-item span {
    min-width: 50px;
    text-align: right;
    color: #4a5568;
    font-weight: 500;
}

/* Dark mode for modal */
[data-theme="dark"] .modal-content {
    background: #2d3748;
}

[data-theme="dark"] .settings-section {
    border-bottom-color: #4a5568;
}

[data-theme="dark"] .settings-section h3 {
    color: #ffffff;
}

[data-theme="dark"] .setting-item label {
    color: #e2e8f0;
}

[data-theme="dark"] .setting-item input[type="text"] {
    background: #1a202c;
    border-color: #4a5568;
    color: #ffffff;
}

[data-theme="dark"] .setting-item span {
    color: #a0aec0;
}

[data-theme="dark"] .modal-footer {
    border-top-color: #4a5568;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
    
    [data-theme="dark"] {
        --border-color: #ffffff;
        --text-secondary: #ffffff;
    }
}

/* Enhanced contrast for all text elements */
.program-name,
.section-title,
.modal-header h2,
.menu-header h3 {
    font-weight: 600;
}

/* Ensure proper contrast for all interactive elements */
.btn {
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Enhanced contrast for form elements */
.control-input {
    font-weight: 500;
}

.control-input:focus {
    font-weight: 600;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Better contrast for exercise display */
.exercise-display h1 {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.timer {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    font-weight: 700;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Blinking animation for First Experience program */
@keyframes gentle-blink {
    0%, 100% { 
        opacity: 1; 
        transform: scale(1);
    }
    50% { 
        opacity: 0.7; 
        transform: scale(1.02);
    }
}

@keyframes attention-pulse {
    0%, 100% { 
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4);
        transform: scale(1);
    }
    50% { 
        box-shadow: 0 0 0 10px rgba(102, 126, 234, 0.1);
        transform: scale(1.01);
    }
}

/* First Experience program highlighting */
.program-card[data-program-id="first_time_user"] {
    animation: gentle-blink 2s ease-in-out infinite, attention-pulse 3s ease-in-out infinite;
    border: 2px solid #667eea !important;
    background: linear-gradient(135deg, #667eea15, #764ba215) !important;
    position: relative;
}

.program-card[data-program-id="first_time_user"]::before {
    content: "🌟 RECOMMENDED";
    position: absolute;
    top: -8px;
    right: -8px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 10;
    animation: gentle-blink 1.5s ease-in-out infinite;
}

.program-card[data-program-id="first_time_user"]:hover {
    animation: none;
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

/* Dark mode support for blinking */
[data-theme="dark"] .program-card[data-program-id="first_time_user"] {
    background: linear-gradient(135deg, #667eea20, #764ba220) !important;
    border-color: #667eea !important;
}

[data-theme="dark"] .program-card[data-program-id="first_time_user"]::before {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}