/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

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

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.login-header .logo i {
    font-size: 2rem;
    color: #25D366;
}

.login-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #333;
}

.login-subtitle {
    color: #666;
    font-size: 0.9rem;
}

.login-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    text-align: center;
    font-size: 0.85rem;
    color: #666;
}

.login-footer ul {
    list-style: none;
    margin-top: 10px;
}

.login-footer li {
    margin: 5px 0;
}

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

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
}

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

.logo i {
    font-size: 2rem;
    color: #25D366;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #333;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info span {
    font-weight: 500;
    color: #666;
}

/* Cards */
.card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
}

.card-header {
    background: linear-gradient(135deg, #25D366, #128C7E);
    color: white;
    padding: 20px 30px;
    border-bottom: none;
}

.card-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 30px;
}

/* Session Status */
.session-status {
    margin-bottom: 20px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    border-radius: 10px;
    font-weight: 500;
}

.status-indicator.online {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status-indicator.offline {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.status-indicator i {
    font-size: 0.8rem;
}

.status-indicator.online i {
    color: #28a745;
}

.status-indicator.offline i {
    color: #dc3545;
}

.qr-container {
    text-align: center;
    margin: 20px 0;
}

.qr-code {
    display: inline-block;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 15px;
}

.qr-code img {
    max-width: 250px;
    height: auto;
}

.qr-instruction {
    color: #666;
    font-size: 0.9rem;
}

.session-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* Message Tabs */
.message-tabs {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 2px solid #f0f0f0;
}

.tab-btn {
    background: none;
    border: none;
    padding: 15px 25px;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: #25D366;
    border-bottom-color: #25D366;
}

.tab-btn:hover {
    color: #25D366;
}

.tab-content {
    display: none;
}

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

/* Forms */
.message-form {
    max-width: 600px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #fafafa;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #25D366;
    background: white;
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-help {
    display: block;
    margin-top: 5px;
    font-size: 0.85rem;
    color: #666;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, #25D366, #128C7E);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #dc3545, #c82333);
    color: white;
    box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 53, 69, 0.4);
}

.btn-outline {
    background: transparent;
    color: #666;
    border: 2px solid #e0e0e0;
}

.btn-outline:hover {
    background: #f8f9fa;
    border-color: #25D366;
    color: #25D366;
}

.btn-full {
    width: 100%;
}

/* API Documentation */
.api-section {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f0f0f0;
}

.api-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.api-section h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.api-endpoint {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.method {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.method.post {
    background: #28a745;
    color: white;
}

.url {
    font-family: 'Courier New', monospace;
    background: #f8f9fa;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.api-params h4 {
    color: #333;
    margin-bottom: 10px;
    font-size: 1rem;
}

.api-params ul {
    list-style: none;
    padding-left: 0;
}

.api-params li {
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.api-params code {
    background: #f8f9fa;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: #e83e8c;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    text-align: center;
    color: white;
}

.loading-spinner i {
    font-size: 2rem;
    margin-bottom: 15px;
}

.loading-spinner p {
    font-size: 1.1rem;
    font-weight: 500;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
}

.toast {
    background: white;
    border-radius: 10px;
    padding: 15px 20px;
    margin-bottom: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border-left: 4px solid #25D366;
    min-width: 300px;
    animation: slideIn 0.3s ease;
}

.toast.error {
    border-left-color: #dc3545;
}

.toast.warning {
    border-left-color: #ffc107;
}

.toast.success {
    border-left-color: #28a745;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .card-body {
        padding: 20px;
    }

    .session-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .message-tabs {
        flex-direction: column;
    }

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

    .qr-code img {
        max-width: 200px;
    }

    .toast {
        min-width: 250px;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 30px 20px;
    }

    .card-header {
        padding: 15px 20px;
    }

    .card-body {
        padding: 15px;
    }

    .qr-code img {
        max-width: 150px;
    }
}

/* Main Content Layout */
.main-content {
    display: grid;
    gap: 30px;
}

/* File Input Styling */
input[type="file"] {
    padding: 8px 12px;
    background: #f8f9fa;
    border: 2px dashed #e0e0e0;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

input[type="file"]:hover {
    border-color: #25D366;
    background: #f0fff4;
}

input[type="file"]:focus {
    outline: none;
    border-color: #25D366;
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}