:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --surface-color: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --border-color: rgba(255, 255, 255, 0.2);
}

/* Dark mode variables */
[data-theme="dark"] {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --background-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --surface-color: rgba(255, 255, 255, 0.05);
    --text-primary: #f8fafc;
    --border-color: rgba(255, 255, 255, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    padding: 1rem;
    min-height: 100vh;
    background: var(--background-gradient);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
    box-sizing: border-box;
    transition: all 0.3s ease;
    position: relative;
}

/* Theme toggle for counter page */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    transition: all 0.2s ease;
    font-size: 1rem;
    backdrop-filter: blur(10px);
    z-index: 1000;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.theme-toggle i {
    transition: transform 0.3s ease;
}

h1 {
    font-size: clamp(2rem, 8vw, 3rem);
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    font-weight: 300;
    text-align: center;
    padding: 0 1rem;
}

.counter-container {
    background: var(--surface-color);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: clamp(1.5rem, 5vw, 3rem);
    margin: 1rem 0;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid var(--border-color);
    max-width: 500px;
    width: 100%;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

.counter {
    font-size: clamp(1rem, 3vw, 1.2rem);
    margin: 1rem 0;
}

.counter-stat {
    margin: 0.8rem 0;
    padding: clamp(0.5rem, 2vw, 1rem);
    border-radius: 10px;
    background: var(--surface-color);
    font-size: clamp(0.9rem, 3vw, 1.1rem);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.remaining {
    font-size: clamp(1.5rem, 6vw, 2.5rem) !important;
    font-weight: bold;
    background: rgba(76, 175, 80, 0.3) !important;
    color: #4CAF50;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    word-break: break-word;
}

.percentage-container {
    margin: 2rem 0;
    position: relative;
}

.percentage-bar {
    width: 100%;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    overflow: hidden;
    margin: 1rem 0;
}

.percentage-fill {
    height: 100%;
    background: linear-gradient(90deg, #4CAF50, #81C784);
    border-radius: 10px;
    transition: width 0.5s ease;
}

.percentage-text {
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    font-weight: bold;
    margin: 1rem 0;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.date-info {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: clamp(1rem, 3vw, 1.5rem);
    margin: 1rem 0;
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 100%;
    max-width: 500px;
    box-sizing: border-box;
}

.date-info p {
    margin: 0.5rem 0;
    font-size: clamp(0.85rem, 3vw, 1rem);
    opacity: 0.9;
    text-align: center;
}

.current-week-info {
    background: rgba(255, 193, 7, 0.2);
    border-radius: 10px;
    padding: clamp(0.8rem, 3vw, 1rem);
    margin: 1rem 0;
    border-left: 4px solid #FFC107;
    font-size: clamp(0.85rem, 3vw, 1rem);
    word-break: break-word;
}

/* Tablet styles */
@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }
    
    .counter-container {
        margin: 0.5rem 0;
    }
    
    .date-info {
        margin: 0.5rem 0;
    }
}

/* Mobile styles */
@media (max-width: 480px) {
    body {
        padding: 0.25rem;
        justify-content: flex-start;
        padding-top: 2rem;
    }
    
    h1 {
        margin-bottom: 1rem;
        font-size: 1.8rem;
    }
    
    .counter-container {
        padding: 1.5rem;
        margin: 0.5rem 0;
        border-radius: 15px;
    }
    
    .counter-stat {
        margin: 0.6rem 0;
        padding: 0.7rem;
        font-size: 0.9rem;
    }
    
    .remaining {
        font-size: 1.8rem !important;
        padding: 1rem !important;
    }
    
    .percentage-text {
        font-size: 1.4rem;
    }
    
    .percentage-bar {
        height: 16px;
        margin: 0.8rem 0;
    }
    
    .date-info {
        padding: 1rem;
        border-radius: 12px;
    }
    
    .date-info p {
        font-size: 0.85rem;
        margin: 0.4rem 0;
    }
    
    .current-week-info {
        padding: 0.8rem;
        font-size: 0.85rem;
        border-radius: 8px;
    }
}

/* Small mobile styles */
@media (max-width: 320px) {
    h1 {
        font-size: 1.5rem;
        margin-bottom: 0.8rem;
    }
    
    .counter-container {
        padding: 1rem;
    }
    
    .remaining {
        font-size: 1.5rem !important;
    }
    
    .percentage-text {
        font-size: 1.2rem;
    }
}

/* Landscape mobile styles */
@media (max-width: 768px) and (orientation: landscape) {
    body {
        padding-top: 1rem;
    }
    
    h1 {
        margin-bottom: 0.5rem;
        font-size: 1.8rem;
    }
    
    .counter-container {
        margin: 0.5rem 0;
        padding: 1.5rem;
    }
    
    .date-info {
        margin: 0.5rem 0;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .counter-stat, .current-week-info {
        min-height: 44px; /* Minimum touch target size */
        display: flex;
        align-items: center;
    }
}