/* Modern Password Generator Styles */
:root {
    /* Light Theme Colors */
    --primary-color: #6366f1;
    --primary-hover: #5145cd;
    --secondary-color: #10b981;
    --background-main: #f8fafc;
    --background-card: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --border-focus: #6366f1;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

/* Dark Theme Colors */
[data-theme="dark"] {
    --primary-color: #818cf8;
    --primary-hover: #6366f1;
    --secondary-color: #34d399;
    --background-main: #0f172a;
    --background-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --border-focus: #818cf8;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--background-main);
    color: var(--text-primary);
    margin: 0;
    padding: 20px;
    min-height: 100vh;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    line-height: 1.6;
}

/* App Container */
.app {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
    min-height: calc(100vh - 40px);
}

@media (min-width: 1024px) {
    .app {
        grid-template-columns: 380px 1fr;
        align-items: start;
    }
}

/* Authentication Section */
.auth-section {
    background: var(--background-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    height: fit-content;
    position: sticky;
    top: 20px;
}

.auth-section.hidden {
    display: none;
}

.auth-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    background: var(--background-main);
    border-radius: var(--radius-md);
    padding: 0.25rem;
}

.auth-tab {
    flex: 1;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
    font-weight: 500;
}

.auth-tab.active {
    background: var(--background-card);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.auth-form {
    display: none;
}

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

/* Main Content Areas */
.main-content {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr 1fr;
    }
}

.section {
    background: var(--background-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    height: fit-content;
}

/* Special grid layout for password generator */
.section:first-child {
    grid-column: 1 / -1;
}

@media (min-width: 1200px) {
    .section:first-child {
        grid-column: 1 / -1;
    }
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0.5rem 0 0 0;
}

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

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--background-card);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
}

.form-input::placeholder {
    color: var(--text-secondary);
}

.form-input[readonly] {
    background: var(--background-main);
    cursor: default;
}

/* Password Display */
.password-display {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.password-display .form-input {
    flex: 1;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    outline: none;
    white-space: nowrap;
}

.btn:focus {
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.2);
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: #059669;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-icon {
    padding: 0.75rem;
    width: auto;
    aspect-ratio: 1;
}

/* Button Groups */
.btn-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-group-full {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

/* Controls Grid */
.controls-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

@media (max-width: 768px) {
    .controls-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* Checkboxes and Radio Buttons */
.checkbox-group,
.radio-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
}

@media (max-width: 768px) {
    .checkbox-group,
    .radio-group {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-item input,
.radio-item input {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--primary-color);
}

/* Range Input */
.range-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.range-input {
    flex: 1;
    height: 0.5rem;
    border-radius: 0.25rem;
    background: var(--background-main);
    outline: none;
    -webkit-appearance: none;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.range-input::-moz-range-thumb {
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

.range-value {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 2rem;
    text-align: center;
}

/* Password History and Results */
.password-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--background-main);
}

.password-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

.password-item:hover {
    background: var(--background-card);
}

.password-item:last-child {
    border-bottom: none;
}

.password-text {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    flex: 1;
    margin-right: 1rem;
}

.password-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

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

/* Bulk Results */
.bulk-results {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    max-height: 300px;
    overflow-y: auto;
    padding: 1rem;
    background: var(--background-main);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.bulk-result-item {
    padding: 0.75rem;
    background: var(--background-card);
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
}

.bulk-result-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

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

/* Alerts and Messages */
.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.alert-success {
    background: rgb(34 197 94 / 0.1);
    color: #059669;
    border: 1px solid rgb(34 197 94 / 0.2);
}

.alert-error {
    background: rgb(239 68 68 / 0.1);
    color: #dc2626;
    border: 1px solid rgb(239 68 68 / 0.2);
}

.alert-info {
    background: rgb(59 130 246 / 0.1);
    color: #2563eb;
    border: 1px solid rgb(59 130 246 / 0.2);
}

/* Tooltips */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: var(--background-card);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    white-space: nowrap;
    z-index: 1000;
    transition: all 0.2s;
    pointer-events: none;
}

.tooltip:hover .tooltip-content {
    visibility: visible;
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }
    
    .app {
        gap: 1rem;
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: 1.5rem;
    }
    
    .controls-grid {
        grid-template-columns: 1fr;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        width: 100%;
    }
    
    .password-display {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .section-header .btn-group {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0.5rem;
    }
    
    .section {
        padding: 1rem;
    }
    
    .bulk-results {
        grid-template-columns: 1fr;
    }
    
    .btn-group-full {
        grid-template-columns: 1fr;
    }
    
    .controls-grid {
        gap: 1rem;
    }
    
    .checkbox-group,
    .radio-group {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

/* Dark mode toggle */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
}

/* Animation utilities */
.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up {
    animation: slideUp 0.3s ease-out;
}

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

/* User Stats */
.user-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: var(--background-main);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

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

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Password Strength Indicator */
.password-strength {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--background-main);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.strength-bar {
    width: 100%;
    height: 0.5rem;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.strength-fill {
    height: 100%;
    transition: all 0.3s ease;
    border-radius: var(--radius-sm);
}

.strength-fill.weak {
    width: 25%;
    background: #ef4444;
}

.strength-fill.fair {
    width: 50%;
    background: #f59e0b;
}

.strength-fill.good {
    width: 75%;
    background: #10b981;
}

.strength-fill.strong {
    width: 100%;
    background: #059669;
}

.strength-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
    text-align: center;
}

/* Fixed positioning for alerts */
.fixed {
    position: fixed;
}

.top-4 {
    top: 1rem;
}

.right-4 {
    right: 1rem;
}

.z-50 {
    z-index: 50;
}

.space-y-2 > * + * {
    margin-top: 0.5rem;
}

/* Alert animations */
.alert {
    transform: translateX(100%);
    animation: slideInRight 0.3s ease-out forwards;
}

.alert.removing {
    animation: slideOutRight 0.3s ease-in forwards;
}

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

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

/* Password Presets */
.presets {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
    justify-content: center;
}

@media (max-width: 768px) {
    .presets {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
}

.preset-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.25rem;
    background: var(--background-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    outline: none;
    white-space: nowrap;
    min-width: 80px;
}

.preset-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.preset-btn:focus {
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.2);
}

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

.preset-hint {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0 0 1.5rem 0;
    font-style: italic;
}