* {
    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 {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #667eea;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav {
    display: flex;
    gap: 20px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    background: #667eea;
    color: white;
}

/* Section Styles */
.section {
    display: none;
    flex: 1;
    padding: 2rem;
}

.section.active {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* Login Styles */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: #333;
}

.login-tabs {
    display: flex;
    margin-bottom: 2rem;
    border-radius: 10px;
    overflow: hidden;
    background: #f0f0f0;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: #667eea;
    color: white;
}

.login-form {
    display: none;
}

.login-form.active {
    display: block;
}

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

.form-group i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #667eea;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 12px 12px 40px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.3s ease;
}

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

.login-btn,
.btn-primary {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.login-btn:hover,
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.signup-link {
    text-align: center;
    margin-top: 1rem;
    color: #666;
}

.signup-link a {
    color: #667eea;
    text-decoration: none;
}

/* Dashboard Styles */
.dashboard {
    display: flex;
    height: calc(100vh - 80px);
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin: 1rem;
}

.sidebar {
    width: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem 0;
    color: white;
}

.user-info {
    text-align: center;
    padding: 0 2rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 2rem;
}

.user-info i {
    font-size: 3rem;
    margin-bottom: 10px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 2rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
}

.nav-item:hover,
.nav-item.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.tab-content h2 {
    margin-bottom: 2rem;
    color: #333;
}

/* Form Styles */
.patient-form,
.billing-form {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Patient Cards */
.patients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.patient-card {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.patient-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.patient-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.patient-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
}

.token-number {
    background: #667eea;
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.patient-info {
    display: grid;
    gap: 8px;
    margin-bottom: 1rem;
}

.info-item {
    display: flex;
    gap: 10px;
    color: #666;
}

.info-item i {
    width: 16px;
    color: #667eea;
}

.patient-actions {
    display: flex;
    gap: 10px;
}

.btn-small {
    padding: 8px 15px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.btn-primary-small {
    background: #667eea;
    color: white;
}

.btn-secondary-small {
    background: #6c757d;
    color: white;
}

.btn-small:hover {
    transform: translateY(-1px);
}

/* Token Management */
.token-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.stat-card h3 {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: #666;
}

.tokens-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.token-card {
    background: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.token-info h4 {
    margin-bottom: 5px;
    color: #333;
}

.token-info p {
    color: #666;
    font-size: 0.9rem;
}

.token-badge {
    background: #667eea;
    color: white;
    padding: 8px 12px;
    border-radius: 20px;
    font-weight: 600;
}

.token-badge.waiting {
    background: #ffc107;
    color: #333;
}

.token-badge.completed {
    background: #28a745;
}

/* Billing Styles */
.services-list {
    display: grid;
    gap: 10px;
}

.services-list label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.services-list label:hover {
    background: #f0f0f0;
}

.bills-history {
    margin-top: 2rem;
}

.bill-item {
    background: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bill-info h4 {
    margin-bottom: 5px;
    color: #333;
}

.bill-info p {
    color: #666;
    font-size: 0.9rem;
}

.bill-amount {
    font-size: 1.2rem;
    font-weight: 600;
    color: #667eea;
}

/* Search Styles */
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 2rem;
}

.search-box input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
}

.search-box button {
    padding: 12px 20px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-box button:hover {
    background: #5a6fd8;
}

/* History Results */
.history-results {
    display: grid;
    gap: 1rem;
}

.history-item {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e0e0e0;
}

.history-content {
    display: grid;
    gap: 10px;
}

/* About Section */
.about-content {
    max-width: 800px;
    text-align: center;
}

.about-content h2 {
    margin-bottom: 2rem;
    color: white;
    font-size: 2.5rem;
}

.about-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 1rem;
}

.feature h3 {
    margin-bottom: 1rem;
    color: #333;
}

.feature p {
    color: #666;
}

/* Contact Section */
.contact-content {
    max-width: 600px;
    text-align: center;
}

.contact-content h2 {
    margin-bottom: 2rem;
    color: white;
    font-size: 2.5rem;
}

.contact-info {
    display: grid;
    gap: 2rem;
}

.contact-item {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-item i {
    font-size: 2rem;
    color: #667eea;
}

.contact-item p {
    color: #333;
    font-size: 1.1rem;
    margin: 0;
}

/* Prescription Form */
.prescription-form {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
    }

    .nav {
        gap: 10px;
    }

    .dashboard {
        flex-direction: column;
        height: auto;
    }

    .sidebar {
        width: 100%;
        padding: 1rem 0;
    }

    .sidebar-nav {
        flex-direction: row;
        overflow-x: auto;
    }

    .nav-item {
        white-space: nowrap;
        padding: 10px 1rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .token-stats {
        grid-template-columns: 1fr;
    }

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

    .tokens-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0;
    }

    .section {
        padding: 1rem;
    }

    .login-box {
        padding: 1.5rem;
        margin: 1rem;
    }

    .dashboard {
        margin: 0.5rem;
        border-radius: 10px;
    }

    .main-content {
        padding: 1rem;
    }

    .patient-form,
    .billing-form,
    .prescription-form {
        padding: 1rem;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* Success/Error Messages */
.message {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: none;
}

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

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

.message.show {
    display: block;
    animation: fadeIn 0.3s ease-in;
}