/* CSS Variables for theming */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* Dark mode variables */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #818cf8;
        --primary-hover: #6366f1;
        --secondary-color: #94a3b8;
        --text-color: #f1f5f9;
        --text-secondary: #94a3b8;
        --bg-color: #0f172a;
        --card-bg: #1e293b;
        --border-color: #334155;
    }
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

/* Header styles */
.header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-weight: 700;
    font-size: 1.25rem;
}

.brand i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Main content */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* Search and filter */
.search-container {
    margin-bottom: 2rem;
}

.search-box {
    position: relative;
    margin-bottom: 1.5rem;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

#searchInput {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-color);
    transition: var(--transition);
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn-clear {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    display: none;
    transition: var(--transition);
}

#searchInput:not(:placeholder-shown) + .btn-clear {
    display: block;
}

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

.filter-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--transition);
    text-transform: capitalize;
}

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

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

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

.password-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

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

.service-name {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.service-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.service-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.service-category {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.password-body {
    margin-bottom: 1.5rem;
}

.password-field {
    margin-bottom: 1rem;
}

.password-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    display: block;
}

.password-value {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-color);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    word-break: break-all;
    min-height: 50px;
}

.password-actions {
    display: flex;
    gap: 0.25rem;
    margin-left: 0.5rem;
}

.btn-icon {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.375rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    font-size: 0.875rem;
}

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

.password-notes {
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--bg-color);
    padding: 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    min-height: 60px;
}

.password-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.timestamp {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.card-actions {
    display: flex;
    gap: 0.5rem;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--border-color);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    border: 2px solid transparent;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

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

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

.btn-danger:hover {
    filter: brightness(0.9);
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: var(--transition);
    z-index: 50;
}

.fab:hover {
    transform: scale(1.1);
    background: var(--primary-hover);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: auto;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

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

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--border-color);
    color: var(--text-color);
}

/* Forms */
.form-group {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.form-group:last-child {
    border-bottom: none;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-color);
    transition: var(--transition);
    font-family: inherit;
    cursor: pointer;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

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

.password-input-group input {
    padding-right: 120px;
}

.password-actions {
    position: absolute;
    right: 0.5rem;
    display: flex;
    gap: 0.25rem;
}

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

/* Import modal specific styles */
.import-content {
    padding: 1.5rem;
}

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

.import-options {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.file-upload {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-upload input {
    display: none;
}

.file-upload label {
    cursor: pointer;
    padding: 0.75rem 1.5rem;
}

.file-upload span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.or-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.or-divider::before,
.or-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
    margin: 0 1rem;
}

.textarea-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.textarea-group textarea {
    min-height: 150px;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
}

/* Toast notifications */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--card-bg);
    color: var(--text-color);
    padding: 1rem 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    opacity: 0;
    transition: var(--transition);
    z-index: 300;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

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

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

.text-success {
    color: var(--success-color);
}

.text-danger {
    color: var(--danger-color);
}

.text-warning {
    color: var(--warning-color);
}

/* Responsive design */
@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .password-grid {
        grid-template-columns: 1fr;
    }
    
    .fab {
        bottom: 1rem;
        right: 1rem;
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .modal {
        width: 95%;
        margin: 1rem;
    }
    
    .modal-header,
    .form-group,
    .modal-actions {
        padding: 1rem;
    }
    
    .password-card {
        padding: 1rem;
    }
    
    .password-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .service-name {
        width: 100%;
        justify-content: space-between;
    }
    
    .password-actions {
        flex-wrap: wrap;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .modal-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .brand h1 {
        font-size: 1.125rem;
    }
    
    .service-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    
    .password-value {
        font-size: 0.75rem;
        padding: 0.5rem;
    }
    
    .btn-icon {
        width: 32px;
        height: 32px;
        padding: 0.25rem;
    }
}

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

.password-card {
    animation: fadeIn 0.3s ease-out;
}

/* Loading states */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}