:root {
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --success-color: #10b981;
    --error-color: #ef4444;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    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;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-dark);
    line-height: 1.6;
}

/* Login Container */
.login-container {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    padding: 40px;
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Logo Area */
.logo-container {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.logo svg {
    width: 40px;
    height: 40px;
    fill: var(--white);
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.logo-subtitle {
    color: var(--text-light);
    font-size: 14px;
}

/* Form Styles */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 12px;
    color: var(--text-light);
    width: 20px;
    height: 20px;
}

.form-group input {
    width: 100%;
    padding: 12px 12px 12px 40px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group input.error {
    border-color: var(--error-color);
}

.error-message {
    color: var(--error-color);
    font-size: 12px;
    margin-top: 4px;
    display: none;
}

.error-message.show {
    display: block;
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Remember Me Checkbox */
.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
}

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.remember-me label {
    font-weight: normal;
    color: var(--text-light);
    cursor: pointer;
    font-size: 14px;
}

/* Button Styles */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-primary:disabled {
    background: #9ca3af;
    cursor: not-allowed;
    transform: none;
}

.btn-logout {
    background: var(--error-color);
    color: var(--white);
}

.btn-logout:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Loading Spinner */
.spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

.spinner.show {
    display: block;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Alert Messages */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: none;
    animation: slideIn 0.3s ease-out;
}

.alert.show {
    display: block;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--error-color);
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

/* Dashboard Styles */
.dashboard-container {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 900px;
    padding: 40px;
    animation: slideIn 0.5s ease-out;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e5e7eb;
}

.dashboard-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

.welcome-message {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 32px;
    box-shadow: var(--shadow);
}

.welcome-message h2 {
    font-size: 24px;
    margin-bottom: 8px;
}

.welcome-message p {
    opacity: 0.9;
    font-size: 14px;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.dashboard-card {
    background: var(--bg-light);
    padding: 24px;
    border-radius: 12px;
    border: 2px solid #e5e7eb;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.card-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--white);
}

.dashboard-card h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.dashboard-card p {
    color: var(--text-light);
    font-size: 14px;
}

/* Footer */
.dashboard-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 2px solid #e5e7eb;
    color: var(--text-light);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 480px) {
    .login-container,
    .dashboard-container {
        padding: 24px;
        margin: 16px;
    }

    .logo-text {
        font-size: 24px;
    }

    .dashboard-title {
        font-size: 24px;
    }

    .dashboard-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

.mt-16 {
    margin-top: 16px;
}

.mb-16 {
    margin-bottom: 16px;
}