/* ===== HEADER & FOOTER STYLES ===== */

/* Header Styles */
.site-header {
    background: linear-gradient(135deg, #2c3e50 0%, #4a6491 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-navigation ul {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 2rem;
    flex-wrap: wrap;
    padding: 0;
    margin: 0;
}

.main-navigation a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.1);
}

.main-navigation a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.main-navigation a.active {
    background: rgba(255, 255, 255, 0.3);
    font-weight: bold;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

/* ===== HOMEPAGE STYLES ===== */
.home-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.mathintro {
    text-align: center;
    margin-bottom: 4rem;
}

.mathintro h1 {
    font-size: 4rem;
    font-weight: 800;
    color: #2c3e50;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.math-description {
    font-size: 1.5rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Operation Cards */
.links {
    display: grid;
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.operation-card {
    background: white;
    border-radius: 16px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 180px;
    padding: 2rem;
    border: 2px solid transparent;
    position: relative;
    overflow: visible;
}

.operation-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border-color: rgba(74, 100, 145, 0.2);
}

.operation-card:active {
    transform: translateY(-4px);
}

.card-content {
    text-align: center;
    width: 100%;
}

.card-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: #2c3e50;
    margin: 0;
    position: relative;
    padding-top: 60px; /* Space for the icon */
}

/* Add colored icons using pseudo-elements */
.card-title::before {
    content: '';
    position: absolute;
        line-height: 1;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    font-weight: bold;
}

/* Individual operation colors and icons */
.addition-card .card-title::before {
    content: '+';
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
}

.subtraction-card .card-title::before {
    content: '−';
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
}

.multiplication-card .card-title::before {
    content: '×';
    background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
}

.division-card .card-title::before {
    content: '÷';
    background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
}

/* Add subtle background effect on hover */
.operation-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(52, 152, 219, 0.05) 0%,
        rgba(231, 76, 60, 0.05) 25%,
        rgba(46, 204, 113, 0.05) 50%,
        rgba(155, 89, 182, 0.05) 75%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.operation-card:hover::after {
    opacity: 1;
}

/* ===== RESPONSIVE FOR HOMEPAGE ===== */
@media (max-width: 1024px) {
    .links {
        grid-template-columns: repeat(2, 1fr);
        max-width: 600px;
    }
    
    .mathintro h1 {
        font-size: 3.5rem;
    }
}

@media (max-width: 768px) {
    .home-container {
        padding: 1.5rem;
    }
    
    .mathintro {
        margin-bottom: 3rem;
    }
    
    .mathintro h1 {
        font-size: 3rem;
    }
    
    .math-description {
        font-size: 1.3rem;
        padding: 0 1rem;
    }
    
    .links {
        grid-template-columns: 1fr;
        max-width: 400px;
        gap: 1.5rem;
    }
    
    .operation-card {
        height: 160px;
    }
    
    .card-title {
        font-size: 2rem;
        padding-top: 50px;
    }
    
    .card-title::before {
        width: 50px;
        height: 50px;
        top: -45px;
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .mathintro h1 {
        font-size: 2.5rem;
    }
    
    .math-description {
        font-size: 1.1rem;
    }
    
    .operation-card {
        height: 140px;
    }
    
    .card-title {
        font-size: 1.8rem;
        padding-top: 45px;
    }
    
    .card-title::before {
        width: 45px;
        height: 45px;
        top: -40px;
        font-size: 1.6rem;
    }
}

/* ===== MATH PRACTICE PAGE STYLES ===== */

/* Container base styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.page-content {
    padding: 20px;
}

/* Title Container */
.title-container {
    text-align: center;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.page-title {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.page-description {
    font-size: 1.2rem;
    color: #7f8c8d;
}

/* Page Intro Styles (for your intro text) */
.page-intro {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem auto;
    max-width: 800px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.page-intro h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.page-intro p {
    color: #7f8c8d;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.page-intro ol {
    padding-left: 1.5rem;
    color: #7f8c8d;
}

.page-intro li {
    margin-bottom: 0.5rem;
}

/* Workspace Container */
.workspace-container {
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.problem-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.problem-statement {
    font-size: 3rem;
    font-weight: bold;
    text-align: center;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 8px;
    min-width: 300px;
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #e9ecef;
}

.user-input {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

#userAnswer {
    padding: 0.75rem 1rem;
    font-size: 1.5rem;
    width: 200px;
    border: 2px solid #4a6491;
    border-radius: 6px;
    text-align: center;
}

#userAnswer:focus {
    outline: none;
    border-color: #2c3e50;
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

button {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
}

#submitAnswer {
    background: linear-gradient(135deg, #4a6491 0%, #2c3e50 100%);
    color: white;
}

#newProblem {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
}

#resetScores {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

button:active {
    transform: translateY(0);
}

.feedback {
    min-height: 40px;
    font-size: 1.2rem;
    font-weight: bold;
    text-align: center;
    padding: 0.5rem;
    border-radius: 6px;
    background: #f8f9fa;
    width: 100%;
    max-width: 400px;
}

.feedback.correct {
    color: #27ae60;
    background: rgba(39, 174, 96, 0.1);
    border: 1px solid rgba(39, 174, 96, 0.2);
}

.feedback.incorrect {
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.2);
}

/* Ratio Container */
.ratio-container {
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.score-display {
    text-align: center;
}

.score-display h3 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

.score-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat {
    padding: 1rem;
    border-radius: 8px;
    background: #f8f9fa;
}

.stat.correct {
    border-left: 4px solid #27ae60;
}

.stat.incorrect {
    border-left: 4px solid #e74c3c;
}

.stat.total {
    border-left: 4px solid #3498db;
}

.stat.accuracy {
    border-left: 4px solid #9b59b6;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-bottom: 0.5rem;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: #2c3e50;
}

/* ===== BASE BODY STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body > main {
    flex: 1;
}

/* Responsive Design for all pages */
@media (max-width: 768px) {
    /* Header responsive */
    .main-navigation ul {
        gap: 1rem;
    }
    
    .main-navigation a {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
    
    /* Math Practice Page Responsive */
    .page-title {
        font-size: 2rem;
    }
    
    .problem-statement {
        font-size: 2.5rem;
        padding: 1rem;
        min-width: 250px;
        min-height: 120px;
    }
    
    #userAnswer {
        width: 100%;
        max-width: 200px;
    }
    
    .user-input {
        flex-direction: column;
    }
    
    .score-stats {
        grid-template-columns: 1fr;
    }
    
    /* Homepage responsive (keep your existing) */
    .mathintro h1 {
        font-size: 2.5rem;
    }
    
    .math-description {
        font-size: 1.2rem;
    }
    
    .links {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
    
    .operation-card {
        height: 160px;
    }
    
    .card-title {
        font-size: 2rem;
        padding-top: 50px;
    }
}

@media (max-width: 480px) {
    /* Header mobile */
    .main-navigation ul {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 0.5rem;
    }
    
    /* Math Practice Page Mobile */
    .problem-statement {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    /* Homepage mobile (keep your existing) */
    .mathintro h1 {
        font-size: 2rem;
    }
    
    .math-description {
        font-size: 1.1rem;
    }
    
    .operation-card {
        height: 140px;
    }
    
    .card-title {
        font-size: 1.8rem;
        padding-top: 45px;
    }
    
    .card-title::before {
        width: 45px;
        height: 45px;
        top: -40px;
        font-size: 1.6rem;
    }
}