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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.8em;
    font-weight: bold;
    color: #667eea;
    cursor: pointer;
}

.nav-links {
    display: flex;
    gap: 15px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 1em;
    white-space: nowrap;
}

.nav-links a:hover {
    background: #667eea;
    color: white;
}

.btn-primary {
    background: linear-gradient(45deg, #667eea, #764ba2) !important;
    color: white !important;
}

.main-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    min-height: 500px;
}

.hidden {
    display: none !important;
}

.form-container {
    max-width: 400px;
    margin: 0 auto;
    padding: 40px;
    background: rgba(255, 255, 255, 0.98);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1em;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

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

.password-toggle {
    position: absolute;
    right: 15px;
    top: 45px;
    cursor: pointer;
    color: #667eea;
}

.btn {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1.1em;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.btn-loading::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    border: 3px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: button-loading-spinner 1s ease infinite;
}

@keyframes button-loading-spinner {
    from {
        transform: rotate(0turn);
    }
    to {
        transform: rotate(1turn);
    }
}

.welcome-section {
    text-align: center;
    padding: 60px 20px;
}

.welcome-section h1 {
    font-size: 3em;
    margin-bottom: 20px;
    color: #333;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.welcome-section p {
    font-size: 1.3em;
    color: #666;
    margin-bottom: 40px;
    line-height: 1.6;
}

.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.dashboard-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid rgba(102, 126, 234, 0.2);
    transition: all 0.3s ease;
    cursor: pointer;
}

.dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.dashboard-card h3 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.alert {
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-error {
    background: #fee;
    color: #c33;
    border: 1px solid #fcc;
}

.alert-success {
    background: #efe;
    color: #3c3;
    border: 1px solid #cfc;
}

.alert-info {
    background: #eef;
    color: #33c;
    border: 1px solid #ccf;
}

.user-info {
    background: rgba(102, 126, 234, 0.1);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    border-left: 4px solid #667eea;
}

.user-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(45deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2em;
    font-weight: bold;
    margin-right: 20px;
}

.profile-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.profile-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.detail-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.detail-card h4 {
    color: #667eea;
    margin-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
}

.form-switch {
    text-align: center;
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
}

.form-switch a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
}

.form-switch a:hover {
    text-decoration: underline;
}

.remember-me {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.remember-me input {
    margin-right: 10px;
}

@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        gap: 10px;
        width: 100%;
        margin-top: 15px;
    }
    
    .nav-links a {
        width: 100%;
        text-align: center;
    }
    
    .welcome-section h1 {
        font-size: 2em;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
    }
    
    .user-avatar {
        margin-right: 0;
        margin-bottom: 15px;
    }
}