/* Custom Enhanced Styles for Document Manager */
/* Color Scheme: Professional Blue Theme */
:root {
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-bg: #f8f9fa;
    --dark-text: #212529;
    --border-color: #dee2e6;
    --shadow: 0 0.125rem 0.25rem rgba(0,0,0,0.075);
    --shadow-lg: 0 0.5rem 1rem rgba(0,0,0,0.15);
}

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

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

/* Container */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header/Navbar */
.navbar {
    background: white;
    box-shadow: var(--shadow);
    padding: 1rem 2rem;
    margin-bottom: 2rem;
    border-radius: 0.5rem;
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

/* Cards */
.card {
    background: white;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    border-bottom: 2px solid var(--light-bg);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-subtitle {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-top: 0.25rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    color: white;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    border: 1px solid transparent;
    border-radius: 0.375rem;
    transition: all 0.15s ease-in-out;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-secondary {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: #5c636a;
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-success:hover {
    background-color: #157347;
}

.btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-danger:hover {
    background-color: #bb2d3b;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background-color: transparent;
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

button[type="submit"] {
    width: 100%;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-text);
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--dark-text);
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.form-text {
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--secondary-color);
}

/* File Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
    background-color: var(--light-bg);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(13, 110, 253, 0.05);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(13, 110, 253, 0.1);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-label {
    display: block;
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.upload-text {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.file-input-wrapper {
    position: relative;
    display: inline-block;
}

input[type="file"] {
    opacity: 0;
    position: absolute;
    z-index: -1;
}

/* Document Grid */
.documents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.document-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

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

.document-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.document-icon.pdf { color: #dc3545; }
.document-icon.docx { color: #0d6efd; }
.document-icon.txt { color: #6c757d; }
.document-icon.jpg, .document-icon.png { color: #198754; }

.document-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.document-info {
    flex: 1;
}

.document-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 0.5rem;
    word-break: break-word;
}

.document-meta {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    color: var(--secondary-color);
    font-size: 0.875rem;
}

.document-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.document-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--light-bg);
}

/* Alerts */
.alert {
    position: relative;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.375rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}

.alert-danger {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

.alert-info {
    color: #055160;
    background-color: #cff4fc;
    border-color: #b6effb;
}

.alert-warning {
    color: #664d03;
    background-color: #fff3cd;
    border-color: #ffecb5;
}

.alert-dismissible {
    padding-right: 3rem;
}

.alert .btn-close {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    opacity: 0.5;
}

.alert .btn-close:hover {
    opacity: 1;
}

/* Welcome Page */
.welcome-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.welcome-card {
    background: white;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 3rem;
    max-width: 500px;
    text-align: center;
}

.welcome-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.welcome-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-text);
    margin-bottom: 1rem;
}

.welcome-subtitle {
    font-size: 1.125rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

.welcome-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Auth Forms */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-card {
    background: white;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    max-width: 450px;
    width: 100%;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.auth-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    color: var(--secondary-color);
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--light-bg);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

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

.stat-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    text-align: center;
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-icon {
    font-size: 4rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.empty-text {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1050;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.5);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-dialog {
    background: white;
    border-radius: 0.75rem;
    max-width: 500px;
    width: 90%;
    margin: 1rem;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--light-bg);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    text-align: center;
    color: var(--secondary-color);
    margin-top: 1rem;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.35em 0.65em;
    font-size: 0.75em;
    font-weight: 600;
    line-height: 1;
    color: white;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.375rem;
}

.badge-primary {
    background-color: var(--primary-color);
}

.badge-success {
    background-color: var(--success-color);
}

.badge-danger {
    background-color: var(--danger-color);
}

.badge-secondary {
    background-color: var(--secondary-color);
}

/* Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--secondary-color); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.gap-2 { gap: 1rem; }

/* Responsive Design */
@media (max-width: 768px) {
    .main-container {
        padding: 1rem;
    }
    
    .navbar {
        padding: 1rem;
    }
    
    .navbar-content {
        flex-direction: column;
        text-align: center;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .documents-grid {
        grid-template-columns: 1fr;
    }
    
    .welcome-card, .auth-card {
        padding: 2rem 1.5rem;
    }
    
    .welcome-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .document-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .welcome-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 0.9rem;
    }
    
    .card-title {
        font-size: 1.25rem;
    }
    
    .document-name {
        font-size: 1rem;
    }
}