/* CSS Variables for theming */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --accent-light: #ff69b4;
    --accent-dark: #007bff;
    --border-color: #e9ecef;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Dark theme variables */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --accent-light: #ff69b4;
    --accent-dark: #007bff;
    --border-color: #404040;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 800px;
    width: 90%;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 20px;
    box-shadow: var(--shadow);
    text-align: center;
}

/* Header styles */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.theme-toggle:hover {
    background: var(--border-color);
    transform: scale(1.1);
}

/* Quote container styles */
.quote-container {
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: 15px;
    box-shadow: var(--shadow);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.quote-text {
    font-size: 1.5rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    font-style: italic;
    color: var(--text-primary);
}

.cursor {
    animation: blink 1s infinite;
    color: var(--accent-light);
    font-weight: bold;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.quote-author {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Button styles */
.controls {
    margin-bottom: 2rem;
}

.btn {
    padding: 12px 30px;
    font-size: 1.1rem;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent-light), var(--accent-dark));
    color: white;
    box-shadow: var(--shadow);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.primary-btn:active {
    transform: translateY(0);
}

/* Progress bar styles */
.progress-container {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-light), var(--accent-dark));
    border-radius: 4px;
    transition: width 0.1s linear;
    width: 100%;
}

.progress-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

#countdown {
    font-weight: bold;
    color: var(--accent-light);
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .quote-text {
        font-size: 1.3rem;
    }
    
    .quote-container {
        padding: 1.5rem;
        min-height: 150px;
    }
    
    header {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .quote-text {
        font-size: 1.2rem;
    }
    
    .btn {
        padding: 10px 25px;
        font-size: 1rem;
    }
}