/* Reset and Base 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, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Login Page Styles */
.login-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
    color: white;
}

.school-logo {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.login-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.login-header h2 {
    font-size: 1.2rem;
    font-weight: 300;
    opacity: 0.9;
}

.login-form-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    backdrop-filter: blur(10px);
    width: 100%;
    max-width: 400px;
    margin-bottom: 2rem;
}

.login-form .form-group {
    margin-bottom: 1.5rem;
}

.login-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #555;
}

.login-form label i {
    margin-right: 0.5rem;
    color: #667eea;
}

.login-form input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

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

.login-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.login-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    width: 100%;
    max-width: 800px;
    margin-bottom: 2rem;
}

.info-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    color: white;
    text-align: center;
}

.info-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.info-card h3 i {
    margin-right: 0.5rem;
}

.login-footer {
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
}

/* Dashboard Styles */
.dashboard {
    min-height: 100vh;
    background: #f8f9fa;
}

.dashboard-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-section i {
    font-size: 2rem;
}

.logo-section h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.user-section {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.user-info i {
    font-size: 1.5rem;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.dashboard-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.message {
    padding: 1rem 1.5rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    align-items: start;
}

.card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.card h2 {
    margin-bottom: 1.5rem;
    color: #333;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
}

.card h2 i {
    color: #667eea;
}

.full-width {
    grid-column: 1 / -1;
}

/* BMI Form Styles */
.bmi-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

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

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,