/* ==========================================
   CSS Variables - Theme Configuration
   ========================================== */
:root {
    /* Primary Colors */
    --primary-start: #4F46E5;
    --primary-end: #7C3AED;
    --primary-gradient: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    
    /* Strength Colors */
    --strength-weak: #EF4444;
    --strength-medium: #F59E0B;
    --strength-strong: #10B981;
    --strength-very-strong: #059669;
    
    /* Neutral Colors */
    --bg-primary: #F9FAFB;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F3F4F6;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* ==========================================
   Global Styles
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(124, 58, 237, 0.03) 0%, transparent 50%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(45deg, transparent 48%, rgba(79, 70, 229, 0.01) 50%, transparent 52%),
        linear-gradient(-45deg, transparent 48%, rgba(124, 58, 237, 0.01) 50%, transparent 52%);
    background-size: 100px 100px;
    pointer-events: none;
    z-index: 0;
}

body > * {
    position: relative;
    z-index: 1;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection color */
::selection {
    background: var(--primary-start);
    color: white;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==========================================
   Header
   ========================================== */
.header {
    background: var(--primary-gradient);
    background-size: 200% 200%;
    animation: gradientShift 8s ease infinite;
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.logo-icon {
    width: 50px;
    height: 50px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-5px);
    }
}

.logo-text {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    position: relative;
    z-index: 1;
}

.tagline {
    font-size: 1.1rem;
    opacity: 0.95;
    font-weight: 300;
    position: relative;
    z-index: 1;
    animation: fadeIn 1s ease-out;
}

/* ==========================================
   Ad Containers
   ========================================== */
.ad-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 90px;
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-color);
    margin: var(--spacing-lg) auto;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
}

/* Hide ad container when empty (before AdSense approval) */
.ad-container:empty,
.ad-container ins[data-ad-status="unfilled"],
.ad-container ins iframe[style*="height: 1px"] {
    display: none;
}

/* Show ad container only when ad is loaded */
.ad-container ins[data-adsbygoogle-status="done"]:not([style*="height: 1px"]) {
    display: block;
}

.ad-top, .ad-bottom {
    max-width: 728px;
    animation: slideDown 0.5s ease-out;
}

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

/* ==========================================
   Main Container
   ========================================== */
.main-container {
    flex: 1;
    padding: var(--spacing-xl) 0;
    animation: fadeIn 0.6s ease-out;
}

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

/* ==========================================
   Mode Tabs
   ========================================== */
.mode-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    background: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.tab-button {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-button:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tab-button.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

/* ==========================================
   Mode Content
   ========================================== */
.mode-content {
    display: none;
}

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

/* ==========================================
   Configuration Section
   ========================================== */
.config-section {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: scaleIn 0.4s ease-out;
}

.config-section:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.config-group {
    margin-bottom: var(--spacing-lg);
}

.config-group:last-child {
    margin-bottom: 0;
}

.config-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.config-group h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.config-group label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

#length-value, #word-count-value, #batch-count-value {
    color: var(--primary-start);
    font-weight: 700;
}

/* ==========================================
   Slider
   ========================================== */
.slider {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-sm);
    background: linear-gradient(to right, var(--bg-tertiary) 0%, var(--primary-start) 0%);
    background-size: 100% 100%;
    outline: none;
    -webkit-appearance: none;
    transition: all 0.3s ease;
}

.slider:hover {
    height: 10px;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-gradient);
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.3);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.6);
}

.slider::-webkit-slider-thumb:active {
    transform: scale(1.1);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-gradient);
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider::-moz-range-thumb:hover {
    transform: scale(1.3);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.6);
}

/* ==========================================
   Checkbox Grid
   ========================================== */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.checkbox-label:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.checkbox-label:active {
    transform: scale(0.98);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-start);
}

.checkbox-label span {
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* ==========================================
   Select Input
   ========================================== */
.select-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.select-input:focus {
    outline: none;
    border-color: var(--primary-start);
}

/* ==========================================
   Advanced Options
   ========================================== */
.advanced-toggle {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.advanced-toggle:hover {
    background: var(--border-color);
}

.toggle-icon {
    transition: transform 0.3s ease;
}

.advanced-toggle.active .toggle-icon {
    transform: rotate(180deg);
}

.advanced-options {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.advanced-options.active {
    max-height: 300px;
    margin-top: var(--spacing-md);
}

.advanced-options .checkbox-label {
    display: flex;
    margin-bottom: var(--spacing-sm);
}

/* ==========================================
   Password Display Section
   ========================================== */
.password-display-section {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    animation: scaleIn 0.4s ease-out 0.1s backwards;
}

.password-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.password-box:hover {
    border-color: var(--primary-start);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    transform: translateY(-2px);
}

.password-box:focus-within {
    border-color: var(--primary-start);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.2);
    transform: translateY(-2px);
}

.password-text {
    flex: 1;
    border: none;
    background: transparent;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: var(--spacing-sm);
    outline: none;
}

.toggle-visibility {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: background 0.2s ease;
}

.toggle-visibility:hover {
    background: var(--border-color);
}

/* ==========================================
   Strength Indicator
   ========================================== */
.strength-section {
    margin-top: var(--spacing-md);
}

.strength-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.strength-fill {
    height: 100%;
    width: 0%;
    background: var(--strength-weak);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.strength-fill::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.strength-fill.weak {
    width: 25%;
    background: linear-gradient(90deg, var(--strength-weak), #DC2626);
}

.strength-fill.medium {
    width: 50%;
    background: linear-gradient(90deg, var(--strength-medium), #F59E0B);
}

.strength-fill.strong {
    width: 75%;
    background: linear-gradient(90deg, var(--strength-strong), #059669);
}

.strength-fill.very-strong {
    width: 100%;
    background: linear-gradient(90deg, var(--strength-very-strong), #047857);
    animation: shimmer 2s infinite, pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(5, 150, 105, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(5, 150, 105, 0.8);
    }
}

.strength-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.strength-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.strength-label.weak {
    color: var(--strength-weak);
}

.strength-label.medium {
    color: var(--strength-medium);
}

.strength-label.strong {
    color: var(--strength-strong);
}

.strength-label.very-strong {
    color: var(--strength-very-strong);
}

.crack-time {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* ==========================================
   Action Buttons
   ========================================== */
.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.5);
}

.btn-primary:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
    border-color: var(--text-secondary);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-md);
}

.btn-secondary:active {
    transform: translateY(0) scale(0.98);
}

/* ==========================================
   Batch Display
   ========================================== */
.batch-display {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    min-height: 300px;
}

.batch-grid {
    display: grid;
    gap: var(--spacing-md);
}

.batch-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    animation: fadeInUp 0.4s ease-out backwards;
}

.batch-item:nth-child(1) { animation-delay: 0s; }
.batch-item:nth-child(2) { animation-delay: 0.05s; }
.batch-item:nth-child(3) { animation-delay: 0.1s; }
.batch-item:nth-child(4) { animation-delay: 0.15s; }
.batch-item:nth-child(5) { animation-delay: 0.2s; }

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

.batch-item:hover {
    background: var(--border-color);
    border-color: var(--primary-start);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.batch-password {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    color: var(--text-primary);
    flex: 1;
}

.batch-copy-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--primary-start);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.2s ease;
}

.batch-copy-btn:hover {
    background: var(--primary-end);
}

/* ==========================================
   History Section
   ========================================== */
.history-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
}

.history-toggle {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: transparent;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s ease;
}

.history-toggle:hover {
    background: var(--bg-tertiary);
}

.history-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.history-content.active {
    max-height: 600px;
    overflow-y: auto;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing-lg) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.history-header span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.btn-clear-history {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--strength-weak);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: opacity 0.2s ease;
}

.btn-clear-history:hover {
    opacity: 0.8;
}

.history-list {
    padding: var(--spacing-lg);
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-start);
    transition: background 0.2s ease, box-shadow 0.2s ease;
}

.history-item:hover {
    background: var(--border-color);
    box-shadow: var(--shadow-md);
}

.history-info {
    flex: 1;
}

.history-password {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.history-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.history-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.history-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-start);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    transition: background 0.2s ease, opacity 0.2s ease;
}

.history-btn:hover {
    background: var(--primary-end);
    opacity: 0.9;
}

.history-btn:active {
    opacity: 0.8;
}

.history-btn.delete {
    background: var(--strength-weak);
}

/* ==========================================
   Security Notice
   ========================================== */
.security-notice {
    background: linear-gradient(135deg, #10B981, #059669);
    background-size: 200% 200%;
    animation: gradientShift 6s ease infinite;
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.security-notice::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 15s linear infinite;
}

.security-notice:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 40px rgba(16, 185, 129, 0.4);
}

.security-notice h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.security-notice p {
    font-size: 1rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

/* ==========================================
   Info Section
   ========================================== */
.info-section {
    margin-bottom: var(--spacing-xl);
}

.info-section h2 {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.info-card {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
}

.info-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.15);
    border-color: var(--primary-start);
}

.info-card h3 {
    transition: color 0.3s ease;
}

.info-card:hover h3 {
    color: var(--primary-start);
}

.info-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-start);
}

.info-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: linear-gradient(135deg, #1F2937, #111827);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: auto;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    font-size: 0.95rem;
    transition: opacity 0.2s ease;
}

.footer-links a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.footer-links span {
    opacity: 0.5;
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ==========================================
   Notification
   ========================================== */
.notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    font-size: 0.95rem;
    opacity: 0;
    transform: translateX(400px) scale(0.8);
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    pointer-events: none;
    z-index: 1000;
}

.notification.show {
    opacity: 1;
    transform: translateX(0) scale(1);
    animation: bounce 0.6s ease-out;
}

@keyframes bounce {
    0% {
        transform: translateX(400px) scale(0.8);
    }
    50% {
        transform: translateX(-10px) scale(1.05);
    }
    70% {
        transform: translateX(5px) scale(0.98);
    }
    100% {
        transform: translateX(0) scale(1);
    }
}

.notification.success {
    background: linear-gradient(135deg, var(--strength-strong), var(--strength-very-strong));
}

.notification.error {
    background: linear-gradient(135deg, var(--strength-weak), #DC2626);
}

/* ==========================================
   Placeholder Text
   ========================================== */
.placeholder-text {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: var(--spacing-xl);
}

/* ==========================================
   Password Checker Section
   ========================================== */
.password-checker-section {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-xl);
    animation: scaleIn 0.4s ease-out 0.2s backwards;
}

.checker-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.checker-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.checker-input-group {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.checker-input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    transition: all 0.3s ease;
}

.checker-input:focus {
    outline: none;
    border-color: var(--primary-start);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.checker-btn {
    flex: 0 0 auto;
    min-width: 180px;
}

.checker-result {
    animation: fadeInUp 0.4s ease-out;
}

.checker-strength {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    text-align: center;
    font-weight: 600;
    font-size: 1.1rem;
}

.checker-strength.weak {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(220, 38, 38, 0.1));
    color: var(--strength-weak);
    border: 2px solid var(--strength-weak);
}

.checker-strength.medium {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.1));
    color: var(--strength-medium);
    border: 2px solid var(--strength-medium);
}

.checker-strength.strong, .checker-strength.very-strong {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.1));
    color: var(--strength-strong);
    border: 2px solid var(--strength-strong);
}

.checker-issues {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.checker-issues h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--strength-weak);
}

.checker-issues ul {
    list-style: none;
    padding-left: 0;
}

.checker-issues li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.checker-issues li::before {
    content: '⚠️ ';
    margin-right: var(--spacing-xs);
}

.checker-suggestion {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(124, 58, 237, 0.1));
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--primary-start);
}

.checker-suggestion h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-start);
}

.suggestion-password {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.suggestion-password-text {
    flex: 1;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.suggestion-use-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.suggestion-use-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.suggestion-explanation {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================
   Strength Preset Buttons
   ========================================== */
.strength-preset-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.preset-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.preset-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.preset-btn:hover::before {
    left: 100%;
}

.preset-btn:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 16px rgba(79, 70, 229, 0.2);
    border-color: var(--primary-start);
}

.preset-btn:active {
    transform: translateY(-2px) scale(1);
}

.preset-btn-active {
    background: var(--primary-gradient);
    border-color: var(--primary-start);
    color: white;
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 8px 20px rgba(79, 70, 229, 0.4);
    }
    50% {
        box-shadow: 0 8px 25px rgba(79, 70, 229, 0.6);
    }
}

.preset-btn-active .preset-label,
.preset-btn-active .preset-detail {
    color: white;
}

.preset-icon {
    font-size: 1.5rem;
}

.preset-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.preset-detail {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* ==========================================
   Name Generator Styles
   ========================================== */
.name-type-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.name-type-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.name-type-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-start);
}

.name-type-active {
    background: var(--primary-gradient);
    border-color: var(--primary-start);
    color: white;
}

.name-display-section {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.name-result {
    margin-bottom: var(--spacing-lg);
}

.name-card {
    background: var(--primary-gradient);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    transition: all 0.4s ease;
    animation: slideIn 0.5s ease-out;
}

.name-card:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 30px rgba(79, 70, 229, 0.3);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.name-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.name-value {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    word-break: break-word;
    transition: all 0.3s ease;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.name-card:hover .name-value {
    transform: scale(1.05);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.name-parts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.name-part {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-start);
    transition: all 0.3s ease;
}

.name-part:hover {
    background: var(--border-color);
    border-left-width: 6px;
    transform: translateX(4px);
}

.part-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.part-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.multiple-names-display {
    margin-top: var(--spacing-lg);
}

.names-grid {
    display: grid;
    gap: var(--spacing-md);
}

.name-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-start);
    transition: all 0.3s ease;
    animation: fadeInUp 0.4s ease-out backwards;
}

.name-item:nth-child(1) { animation-delay: 0s; }
.name-item:nth-child(2) { animation-delay: 0.05s; }
.name-item:nth-child(3) { animation-delay: 0.1s; }
.name-item:nth-child(4) { animation-delay: 0.15s; }
.name-item:nth-child(5) { animation-delay: 0.2s; }

.name-item:hover {
    background: var(--border-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
    border-left-width: 6px;
}

.name-item-text {
    flex: 1;
}

.name-item-full {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.name-item-parts {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.name-item-copy {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--primary-start);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.2s ease;
}

.name-item-copy:hover {
    background: var(--primary-end);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 768px) {
    .logo-text {
        font-size: 1.5rem;
    }

    .tagline {
        font-size: 0.95rem;
    }

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

    .tab-button {
        padding: var(--spacing-md);
    }

    .config-section {
        padding: var(--spacing-lg);
    }

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

    .action-buttons {
        flex-direction: column;
    }

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

    .ad-top, .ad-bottom {
        min-height: 250px;
    }

    .password-text {
        font-size: 0.9rem;
    }

    .notification {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .logo-icon {
        width: 40px;
        height: 40px;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .info-card {
        padding: var(--spacing-lg);
    }

    .strength-preset-buttons {
        grid-template-columns: repeat(2, 1fr);
    }

    .name-type-buttons {
        grid-template-columns: 1fr;
    }

    .name-value {
        font-size: 1.5rem;
    }
}