/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Enhanced Color System - Light Theme */
    --bg-primary: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-quaternary: #e2e8f0;
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Glass morphism effects */
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    
    /* Enhanced spacing system */
    --spacing-0: 0;
    --spacing-px: 1px;
    --spacing-0-5: 0.125rem;
    --spacing-1: 0.25rem;
    --spacing-1-5: 0.375rem;
    --spacing-2: 0.5rem;
    --spacing-2-5: 0.625rem;
    --spacing-3: 0.75rem;
    --spacing-3-5: 0.875rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-7: 1.75rem;
    --spacing-8: 2rem;
    --spacing-9: 2.25rem;
    --spacing-10: 2.5rem;
    --spacing-11: 2.75rem;
    --spacing-12: 3rem;
    --spacing-14: 3.5rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    --spacing-28: 7rem;
    --spacing-32: 8rem;
    
    /* Enhanced typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --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;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Enhanced border radius */
    --radius-none: 0;
    --radius-sm: 0.125rem;
    --radius: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;
    
    /* Enhanced transitions */
    --transition-fast: all 0.15s ease;
    --transition: all 0.2s ease;
    --transition-slow: all 0.3s ease;
    --transition-bounce: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
.dark-theme {
    --bg-primary: linear-gradient(135deg, #1e293b 0%, #334155 50%, #475569 100%);
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-quaternary: #475569;
    --text-primary: #f8fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    --text-inverse: #0f172a;
    --border: #475569;
    --border-light: #334155;
    --glass-bg: rgba(15, 23, 42, 0.25);
    --glass-border: rgba(148, 163, 184, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: var(--font-size-base);
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Enhanced Background Container - FULLSCREEN EXCEPT FOOTER */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 0;
    overflow: hidden;
}

.background-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s ease;
    opacity: 0;
    transform: scale(1.05);
}

.background-image.active {
    opacity: 1;
    transform: scale(1);
}

.background-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    backdrop-filter: blur(1px);
    z-index: 1;
    transition: background var(--transition);
}

.dark-theme .background-overlay {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.3), rgba(30, 41, 59, 0.3));
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    position: relative;
    z-index: 2;
}

/* NEW HEADER DESIGN - All titles in white */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    padding: var(--spacing-4) 0;
    position: relative;
    z-index: 100;
    transition: all var(--transition);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.dark-theme .header {
    background: rgba(30, 41, 59, 0.95);
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-6);
}

/* Left section: Back button and title */
.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.back-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: none;
    border: none;
    color: #ffffff; /* Changed to white */
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-lg);
    text-decoration: none;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3); /* Added shadow for better visibility */
}

.back-button:hover {
    color: var(--primary-light);
    background: rgba(96, 165, 250, 0.1);
}

.back-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.back-text {
    font-weight: 700; /* Extra bold for Hub-ES */
}

.header-divider {
    width: 1px;
    height: 24px;
    background: rgba(255, 255, 255, 0.3); /* Made lighter for better visibility */
    margin: 0 var(--spacing-2);
}

.header-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: #ffffff; /* White color as requested */
    margin: 0;
    letter-spacing: -0.025em;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3); /* Added shadow for better visibility */
}

/* Right section: Subtitle and controls */
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.header-subtitle {
    font-size: var(--font-size-sm);
    /* Hub-ES gradient colors: purple/orange/pink */
    background: linear-gradient(135deg, #8b5cf6 0%, #f97316 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
    letter-spacing: 0.025em;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

/* Enhanced Control Buttons */
.theme-toggle,
.settings-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-bounce);
    color: var(--text-secondary);
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.theme-toggle:hover,
.settings-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.theme-icon {
    width: 18px;
    height: 18px;
    position: absolute;
    transition: opacity var(--transition), transform var(--transition-bounce);
}

.light-theme .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.light-theme .moon-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0.8);
}

.dark-theme .sun-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0.8);
}

.dark-theme .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Enhanced Language Selector */
.language-selector {
    position: relative;
}

.language-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-bounce);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    min-width: 70px;
    height: 40px;
    box-shadow: var(--shadow);
    font-size: var(--font-size-sm);
}

.language-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.flag-icon {
    font-size: 16px;
    line-height: 1;
}

.chevron-icon {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-bounce);
}

.language-selector.open .chevron-icon {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-2));
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all var(--transition-smooth);
    z-index: 1000;
    backdrop-filter: blur(20px);
    overflow: hidden;
}

.language-selector.open .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.language-option {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-3) var(--spacing-4);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.language-option:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
}

.language-option.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
}

/* ===== ENHANCED ADSENSE DISPLAY AD CONTAINERS ===== */

.ad-container {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    margin: var(--spacing-4) 0;
    box-shadow: var(--shadow-md);
}

.ad-container:empty::before {
    content: 'Advertisement';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.ad-container-header {
    width: 100%;
    max-width: 728px;
    height: 90px;
    margin: 0 auto var(--spacing-6);
}

.ad-container-sidebar {
    width: 160px;
    height: 600px;
    position: sticky;
    top: calc(var(--spacing-20) + 120px);
    margin: var(--spacing-6) 0;
}

.ad-container-content {
    width: 100%;
    max-width: 300px;
    height: 250px;
    margin: var(--spacing-10) auto;
}

.adsbygoogle {
    display: block !important;
    width: 100% !important;
    height: 100% !important;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

/* Enhanced Main Content Layout */
.main {
    flex: 1;
    padding: var(--spacing-12) 0;
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 200px);
}

.main-layout {
    display: grid;
    grid-template-columns: 160px 1fr 160px;
    gap: var(--spacing-8);
    align-items: start;
    width: 100%;
    max-width: 1400px;
}

.sidebar-left,
.sidebar-right {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Enhanced Timer Section */
.timer-section {
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    border-radius: var(--radius-3xl);
    padding: var(--spacing-12);
    box-shadow: var(--shadow-2xl);
    border: 1px solid var(--glass-border);
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.timer-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
}

.session-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.session-type {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-inverse);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.025em;
}

.session-counter {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.15);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Enhanced Timer Container */
.timer-container {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-10);
}

.progress-ring {
    width: 320px;
    height: 320px;
    transform: rotate(-90deg);
    filter: drop-shadow(0 8px 32px rgba(59, 130, 246, 0.3));
}

.progress-ring__background {
    fill: none;
    stroke: rgba(255, 255, 255, 0.15);
    stroke-width: 6;
}

.progress-ring__progress {
    fill: none;
    stroke: url(#progressGradient);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 534.07;
    stroke-dashoffset: 534.07;
    transition: stroke-dashoffset 1s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 0 20px rgba(59, 130, 246, 0.6));
}

.timer-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.time {
    font-size: var(--font-size-5xl);
    font-weight: 300;
    color: var(--text-inverse);
    margin-bottom: var(--spacing-6);
    font-variant-numeric: tabular-nums;
    text-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.05em;
    font-feature-settings: 'tnum';
}

.timer-controls {
    display: flex;
    gap: var(--spacing-3);
    justify-content: center;
}

.control-btn {
    width: 56px;
    height: 56px;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-bounce);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
}

.control-btn svg {
    width: 24px;
    height: 24px;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.start-btn, .pause-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--text-inverse);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.start-btn:hover, .pause-btn:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-xl);
}

.reset-btn, .skip-btn {
    background: var(--glass-bg);
    color: var(--text-inverse);
    border: 1px solid var(--glass-border);
}

.reset-btn:hover, .skip-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-xl);
}

.hidden {
    display: none !important;
}

/* ===== COMPACT FOOTER DESIGN ===== */
.site-footer {
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    border-top: 1px solid var(--glass-border);
    position: relative;
    z-index: 100;
    transition: all var(--transition);
    margin-top: auto;
    box-shadow: 0 -8px 32px 0 rgba(31, 38, 135, 0.37);
    padding: var(--spacing-8) 0 var(--spacing-6);
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-12);
    align-items: start;
    margin-bottom: var(--spacing-6);
}

/* Footer Brand Section */
.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.footer-logo-icon {
    width: 40px;
    height: 40px;
    color: var(--primary);
    filter: drop-shadow(0 2px 8px rgba(59, 130, 246, 0.4));
    flex-shrink: 0;
    margin-top: var(--spacing-1);
}

.footer-brand-info {
    flex: 1;
}

.footer-brand-name {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-inverse);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.025em;
    margin-bottom: var(--spacing-2);
}

.footer-brand-subtitle {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-3);
}

.footer-ecosystem {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.footer-ecosystem strong {
    color: var(--primary-light);
    font-weight: 700;
}

/* Hub-ES link styling */
.hub-es-link {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 700;
}

.hub-es-link:hover {
    color: #ffffff;
    text-shadow: 0 0 8px rgba(96, 165, 250, 0.5);
}

/* Footer Navigation */
.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

.footer-column {
    display: flex;
    flex-direction: column;
}

.footer-column-title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--text-inverse);
    margin-bottom: var(--spacing-4);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.025em;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.footer-link {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition);
    padding: var(--spacing-1) 0;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.footer-link:hover {
    color: var(--primary-light);
    text-shadow: 0 0 8px rgba(96, 165, 250, 0.5);
    transform: translateX(4px);
}

/* Footer Bottom */
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-6);
    text-align: center;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-weight: 500;
}

/* Enhanced Welcome Modal */
.welcome-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--spacing-6);
    backdrop-filter: blur(20px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.welcome-modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.welcome-modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-2xl);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow: hidden;
    position: relative;
    transform: scale(0.9) translateY(40px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.welcome-modal-overlay.show .welcome-modal {
    transform: scale(1) translateY(0);
}

.welcome-modal-content {
    padding: var(--spacing-8);
    text-align: center;
    position: relative;
    overflow-y: auto;
    flex: 1;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
}

.welcome-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-6);
}

.welcome-icon svg {
    width: 40px;
    height: 40px;
    color: var(--primary);
    z-index: 2;
    position: relative;
    filter: drop-shadow(0 4px 8px rgba(59, 130, 246, 0.4));
}

.welcome-icon-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-full);
    opacity: 0.15;
    animation: pulse 3s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.15; }
    50% { transform: scale(1.1); opacity: 0.25; }
}

.welcome-title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
}

.welcome-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-8);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.welcome-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

.welcome-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4) var(--spacing-5);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    transition: var(--transition-bounce);
    border: 1px solid var(--border);
}

.welcome-feature:hover {
    background: rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
    border-color: var(--primary);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.feature-icon svg {
    width: 20px;
    height: 20px;
    color: var(--text-inverse);
}

.welcome-feature span {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
}

.welcome-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-6);
}

.welcome-btn {
    padding: var(--spacing-4) var(--spacing-6);
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: var(--transition-bounce);
    font-weight: 700;
    font-size: var(--font-size-base);
    position: relative;
    overflow: hidden;
}

.welcome-btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-inverse);
    box-shadow: var(--shadow-lg);
}

.welcome-btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.welcome-btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.welcome-btn-secondary:hover {
    background: var(--bg-quaternary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.welcome-checkbox {
    display: flex;
    justify-content: center;
    align-items: center;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    transition: var(--transition);
}

.checkbox-container:hover {
    color: var(--text-secondary);
}

.checkbox-container input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    position: relative;
    transition: var(--transition);
    background: var(--bg-secondary);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid var(--text-inverse);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-text {
    user-select: none;
    font-weight: 500;
}

/* Enhanced Break Mode Overlay */
.break-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.95), rgba(59, 130, 246, 0.95));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
    backdrop-filter: blur(20px);
}

.break-overlay.hidden {
    display: none;
}

.break-content {
    text-align: center;
    color: var(--text-inverse);
    max-width: 600px;
    padding: var(--spacing-12);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-3xl);
    backdrop-filter: blur(30px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-2xl);
}

.break-icon {
    margin-bottom: var(--spacing-6);
}

.break-icon svg {
    width: 64px;
    height: 64px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.break-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-6);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.025em;
}

.break-message {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-8);
    opacity: 0.95;
    line-height: 1.6;
}

.skip-break-btn {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-inverse);
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: var(--spacing-4) var(--spacing-8);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: var(--transition-bounce);
    font-weight: 700;
    backdrop-filter: blur(20px);
    font-size: var(--font-size-base);
}

.skip-break-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

/* Enhanced Modal System */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-6);
    backdrop-filter: blur(10px);
    overflow-y: auto;
}

.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-2xl);
    width: 100%;
    max-width: 800px;
    max-height: calc(100vh - 3rem);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition);
    margin: auto;
    position: relative;
    border: 1px solid var(--border);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-8);
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(20px);
}

.modal-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.close-btn {
    background: none;
    border: none;
    padding: var(--spacing-3);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: scale(1.1);
}

.close-btn svg {
    width: 24px;
    height: 24px;
}

.modal-content {
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
}

.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius);
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: var(--radius);
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.settings-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 5;
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: var(--spacing-5);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    font-size: var(--font-size-base);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
}

.tab-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tab-content {
    display: none;
    padding: var(--spacing-8);
    min-height: 500px;
}

.tab-content.active {
    display: block;
}

.settings-group {
    margin-bottom: var(--spacing-10);
}

.settings-group:last-child {
    margin-bottom: 0;
}

.settings-group h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-8);
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.setting-item {
    margin-bottom: var(--spacing-6);
}

.setting-item label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.setting-item input {
    width: 100%;
    padding: var(--spacing-4);
    border: 2px solid var(--border);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-base);
    transition: var(--transition);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 500;
}

.setting-item input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.range-info {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--spacing-2);
    font-weight: 500;
}

.theme-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.theme-option {
    cursor: pointer;
    border: 2px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-6);
    text-align: center;
    transition: var(--transition-bounce);
    background: var(--bg-secondary);
}

.theme-option:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.theme-option.active {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
    box-shadow: var(--shadow-md);
}

.theme-preview {
    width: 100%;
    height: 100px;
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-4);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.light-preview {
    background: linear-gradient(135deg, #f8fafc, #ffffff);
}

.dark-preview {
    background: linear-gradient(135deg, #0f172a, #1e293b);
}

.preview-header {
    height: 24px;
    background: rgba(59, 130, 246, 0.3);
}

.preview-content {
    padding: var(--spacing-4);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 76px;
}

.preview-circle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--primary);
    box-shadow: var(--shadow-md);
}

.language-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-6);
}

.language-option-card {
    cursor: pointer;
    border: 2px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-6);
    text-align: center;
    transition: var(--transition-bounce);
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-3);
}

.language-option-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.language-option-card.active {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
    box-shadow: var(--shadow-md);
}

.language-option-card .flag-icon {
    font-size: 32px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.upload-area {
    border: 3px dashed var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-12);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: var(--spacing-8);
    background: var(--bg-secondary);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
    transform: translateY(-2px);
}

.upload-content {
    pointer-events: none;
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-6);
}

.upload-area p {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-3);
    font-weight: 600;
}

.file-info {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-6);
    max-height: 400px;
    overflow-y: auto;
    padding: var(--spacing-4);
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
}

.image-grid::-webkit-scrollbar {
    width: 8px;
}

.image-grid::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius);
}

.image-grid::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: var(--radius);
}

.image-grid::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.image-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--bg-tertiary);
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.image-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.remove-image {
    position: absolute;
    top: var(--spacing-2);
    right: var(--spacing-2);
    width: 32px;
    height: 32px;
    background: rgba(239, 68, 68, 0.9);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.image-item:hover .remove-image {
    opacity: 1;
}

.remove-image:hover {
    background: rgba(239, 68, 68, 1);
    transform: scale(1.1);
}

.remove-image svg {
    width: 16px;
    height: 16px;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-4);
    padding: var(--spacing-8);
    border-top: 1px solid var(--border);
    justify-content: flex-end;
    background: var(--bg-secondary);
    position: sticky;
    bottom: 0;
    z-index: 10;
    backdrop-filter: blur(20px);
}

.btn {
    padding: var(--spacing-4) var(--spacing-8);
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: var(--transition-bounce);
    font-weight: 700;
    font-size: var(--font-size-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #7c3aed);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-quaternary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* Enhanced Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(20px);
}

.loader {
    text-align: center;
}

.loader-ring {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid var(--primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-6);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loader p {
    color: var(--text-inverse);
    font-weight: 600;
    font-size: var(--font-size-lg);
}

/* Enhanced Notifications */
.notification {
    position: fixed;
    top: var(--spacing-6);
    right: var(--spacing-6);
    background: var(--success);
    color: var(--text-inverse);
    padding: var(--spacing-5) var(--spacing-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    z-index: 1100;
    animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-weight: 600;
    font-size: var(--font-size-base);
}

.notification.error {
    background: var(--error);
}

.notification.warning {
    background: var(--warning);
}

@keyframes slideIn {
    from {
        transform: translateX(100%) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translateX(0) scale(1);
        opacity: 1;
    }
}

/* ===== RESPONSIVE DESIGN ===== */

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .sidebar-left,
    .sidebar-right {
        display: none;
    }
    
    .ad-container-sidebar {
        display: none;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .footer-nav {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-6);
    }
    
    .header-content {
        flex-wrap: wrap;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .main {
        padding: var(--spacing-8) 0;
        min-height: calc(100vh - 120px);
    }
    
    .timer-section {
        padding: var(--spacing-8);
        margin: 0 var(--spacing-2);
    }
    
    .progress-ring {
        width: 280px;
        height: 280px;
    }
    
    .time {
        font-size: var(--font-size-4xl);
    }
    
    .timer-controls {
        gap: var(--spacing-2);
    }
    
    .control-btn {
        width: 48px;
        height: 48px;
    }
    
    .control-btn svg {
        width: 20px;
        height: 20px;
    }
    
    .break-content {
        padding: var(--spacing-8);
        margin: 0 var(--spacing-4);
    }
    
    .modal {
        margin: var(--spacing-3);
        max-height: calc(100vh - 1.5rem);
    }
    
    .modal-header,
    .tab-content,
    .modal-footer {
        padding: var(--spacing-6);
    }
    
    .settings-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        border-bottom: none;
        border-right: 3px solid transparent;
        text-align: left;
    }
    
    .tab-btn.active {
        border-right-color: var(--primary);
        border-bottom-color: transparent;
    }
    
    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: var(--spacing-4);
    }
    
    .header-controls {
        gap: var(--spacing-2);
    }
    
    .theme-options,
    .language-options {
        grid-template-columns: 1fr;
    }
    
    .welcome-modal {
        margin: var(--spacing-4);
        max-width: calc(100vw - 2rem);
        max-height: calc(100vh - 2rem);
    }
    
    .welcome-modal-content {
        padding: var(--spacing-6);
    }
    
    .welcome-title {
        font-size: var(--font-size-xl);
    }
    
    .welcome-actions {
        flex-direction: column;
    }
    
    /* Footer Mobile */
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
        text-align: center;
    }
    
    .footer-nav {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
        text-align: center;
    }
    
    /* Header Mobile */
    .header-content {
        flex-direction: column;
        gap: var(--spacing-4);
        align-items: stretch;
    }
    
    .header-left {
        justify-content: center;
    }
    
    .header-right {
        order: 3;
        flex-direction: column;
        gap: var(--spacing-3);
        align-items: center;
    }
    
    .header-subtitle {
        text-align: center;
    }
    
    .ad-container-header {
        max-width: 468px;
        height: 60px;
    }
    
    .ad-container-content {
        max-width: 300px;
        height: 250px;
    }
}

@media (max-width: 480px) {
    .session-info {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .header-content {
        gap: var(--spacing-3);
    }
    
    .header-left {
        flex-direction: column;
        gap: var(--spacing-2);
        align-items: center;
    }
    
    .header-divider {
        width: 24px;
        height: 1px;
        margin: 0;
    }
    
    .header-title {
        font-size: var(--font-size-xl);
    }
    
    .timer-section {
        padding: var(--spacing-6);
    }
    
    .progress-ring {
        width: 240px;
        height: 240px;
    }
    
    .time {
        font-size: var(--font-size-3xl);
    }
    
    .upload-area {
        padding: var(--spacing-8);
    }
    
    .break-title {
        font-size: var(--font-size-2xl);
    }
    
    .break-message {
        font-size: var(--font-size-lg);
    }
    
    .welcome-modal-content {
        padding: var(--spacing-5);
    }
    
    .welcome-icon {
        width: 60px;
        height: 60px;
        margin-bottom: var(--spacing-4);
    }
    
    .welcome-icon svg {
        width: 30px;
        height: 30px;
    }
    
    .welcome-title {
        font-size: var(--font-size-lg);
    }
    
    .welcome-description {
        font-size: var(--font-size-sm);
    }
    
    .modal {
        margin: var(--spacing-2);
        max-height: calc(100vh - 1rem);
    }
    
    .modal-header,
    .tab-content,
    .modal-footer {
        padding: var(--spacing-4);
    }
    
    /* Footer Small Mobile */
    .footer-main {
        gap: var(--spacing-4);
    }
    
    .footer-logo {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--spacing-3);
    }
    
    .footer-logo-icon {
        margin-top: 0;
    }
    
    .footer-nav {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
    }
    
    .footer-brand-name {
        font-size: var(--font-size-xl);
    }
    
    .ad-container-header,
    .ad-container-footer {
        max-width: 320px;
        height: 50px;
    }
    
    .ad-container-content {
        max-width: 280px;
        height: 200px;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.4s ease;
}

.scale-in {
    animation: scaleIn 0.4s ease;
}

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

@keyframes scaleIn {
    from { 
        opacity: 0;
        transform: scale(0.95);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}

/* Smooth transitions for theme changes */
* {
    transition: background-color var(--transition), 
                color var(--transition), 
                border-color var(--transition);
}

/* Prevent transition on page load */
.preload * {
    transition: none !important;
}

/* Scroll behavior improvements */
html {
    scroll-behavior: smooth;
}

/* Enhanced focus styles for accessibility */
*:focus {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius);
}

/* Ensure interactive elements are accessible in scrollable areas */
.modal-content *:focus,
.welcome-modal-content *:focus,
.image-grid *:focus {
    scroll-margin: var(--spacing-6);
}

/* Enhanced glass morphism effects */
@supports (backdrop-filter: blur(20px)) {
    .header,
    .timer-section,
    .site-footer {
        background: var(--glass-bg);
        backdrop-filter: blur(30px);
        border: 1px solid var(--glass-border);
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .welcome-icon-bg {
        animation: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border: #000000;
        --text-primary: #000000;
        --bg-secondary: #ffffff;
    }
    
    .dark-theme {
        --border: #ffffff;
        --text-primary: #ffffff;
        --bg-secondary: #000000;
    }
}

/* Print styles */
@media print {
    .header,
    .site-footer,
    .ad-container,
    .welcome-modal-overlay,
    .modal-overlay,
    .break-overlay,
    .loading-overlay,
    .notification {
        display: none !important;
    }
    
    .timer-section {
        background: white;
        color: black;
        box-shadow: none;
        border: 2px solid black;
    }
}