/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Color Palette - Modern Dark Theme */
    --primary-bg: #0a0e27;
    --secondary-bg: #1a1f3a;
    --accent-cyan: #00ffaa;
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --gradient-start: #1e1b4b;
    --gradient-end: #312e81;
    --text-primary: #ffffff;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-glow: rgba(0, 255, 170, 0.3);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

/* ===================================
   Base Styles
   =================================== */
body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 50%, #1e293b 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* ===================================
   Return Button
   =================================== */
.return-button {
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.return-button:hover {
    background: var(--glass-border);
    border-color: var(--accent-cyan);
    box-shadow: 0 4px 20px var(--shadow-glow);
    transform: translateY(-2px);
}

.return-button svg {
    transition: transform var(--transition-fast);
}

.return-button:hover svg {
    transform: translateX(-3px);
}

/* ===================================
   Main Container
   =================================== */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    flex: 1;
    width: 100%;
}

.tool-wrapper {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Header Section
   =================================== */
.tool-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.main-heading {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.accent {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    text-shadow: 0 0 30px var(--shadow-glow);
    animation: glow 3s ease-in-out infinite;
}

@keyframes glow {

    0%,
    100% {
        filter: brightness(1);
    }

    50% {
        filter: brightness(1.3);
    }
}

.tool-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto;
}

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

.input-wrapper {
    position: relative;
}

.input-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.input-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-blue));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.input-container:focus-within::before {
    transform: scaleX(1);
}

.input-container:focus-within {
    box-shadow: 0 8px 30px var(--shadow-glow);
}

.checkmark-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    flex-shrink: 0;
}

#password-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.05rem;
    background: transparent;
    color: #1e293b;
    font-weight: 500;
}

#password-input::placeholder {
    color: #94a3b8;
}

.toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #64748b;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
}

.toggle-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #334155;
}

.toggle-btn:active {
    transform: scale(0.95);
}

/* ===================================
   GEO & AI Search Optimization Styles
   =================================== */
.quick-facts-box {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-lg);
    text-align: left;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.quick-facts-box strong {
    color: var(--accent-blue);
}

.privacy-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
    padding: 0.5rem 1rem;
    background: rgba(0, 255, 170, 0.1);
    border: 1px solid var(--accent-cyan);
    border-radius: 2rem;
    color: var(--accent-cyan);
    font-size: 0.85rem;
    font-weight: 600;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    animation: fadeIn 0.5s ease;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.entropy-badge {
    display: inline-block;
    margin-top: var(--spacing-sm);
    padding: 0.25rem 0.75rem;
    background: var(--glass-border);
    border-radius: 1rem;
    font-size: 0.9rem;
    color: var(--accent-cyan);
    font-weight: 500;
}

.entropy-meter {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    text-align: center;
}

.bits-count {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-cyan);
}

.bits-count small {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
}

.bits-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.gpu-comparison-section {
    margin: var(--spacing-xl) 0;
}

.table-responsive {
    overflow-x: auto;
    margin-top: var(--spacing-md);
}

.gpu-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.gpu-table th,
.gpu-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

.gpu-table th {
    background: rgba(255, 255, 255, 0.05);
    color: var(--accent-cyan);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

.gpu-table td {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.highlight-row {
    background: rgba(168, 85, 247, 0.1);
}

.highlight-row td:first-child {
    font-weight: 700;
    color: var(--accent-purple);
}

@media (max-width: 480px) {
    .bits-count {
        font-size: 2rem;
    }

    .gpu-table th,
    .gpu-table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.85rem;
    }
}

/* ===================================
   Result Section
   =================================== */
.result-section {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.time-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.time-value {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: var(--spacing-sm) 0;
    animation: pulse 2s ease-in-out infinite;
    line-height: 1.2;
}

@keyframes pulse {

    0%,
    100% {
        filter: brightness(1);
        transform: scale(1);
    }

    50% {
        filter: brightness(1.2);
        transform: scale(1.02);
    }
}

.time-subtext {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* ===================================
   Length Section
   =================================== */
.length-section {
    border-top: 2px solid var(--glass-border);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.length-title {
    font-size: 1.25rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--accent-cyan);
    color: var(--accent-cyan);
}

.length-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===================================
   Featured SEO Image
   =================================== */
.featured-image-container {
    margin: var(--spacing-lg) auto;
    text-align: center;
    max-width: 100%;
    animation: fadeInUp 0.8s ease;
}

.featured-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    transition: transform var(--transition-normal);
}

.featured-image:hover {
    transform: scale(1.02);
}

/* ===================================
   AdSense Container
   =================================== */
.ad-container {
    margin: var(--spacing-xl) auto;
    padding: var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    text-align: center;
}

/* ===================================
   FAQ Section
   =================================== */
.faq-section {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.faq-section h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.faq-item {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-cyan);
    transition: all var(--transition-normal);
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateX(5px);
}

.faq-item h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================
   Footer
   =================================== */
.site-footer {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--secondary-bg);
    border-top: 1px solid var(--glass-border);
    margin-top: auto;
}

.site-footer p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.site-footer a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-footer a:hover {
    color: var(--accent-purple);
    text-decoration: underline;
}

/* ===================================
   SEO Article Styles
   =================================== */
.seo-article {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    line-height: 1.8;
}

.article-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.article-header h1 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.quick-answer {
    background: rgba(0, 255, 170, 0.1);
    border-left: 4px solid var(--accent-cyan);
    padding: var(--spacing-md);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.article-body h2 {
    font-size: 1.75rem;
    color: var(--accent-cyan);
    margin: var(--spacing-xl) 0 var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
}

.article-body h3 {
    font-size: 1.35rem;
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.article-body p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.feature-card,
.highlight-card,
.rules-box,
.privacy-note,
.cta-section {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    transition: transform var(--transition-normal);
}

.feature-card:hover,
.highlight-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-purple);
}

.highlight-card {
    border-left: 4px solid var(--accent-purple);
}

.rules-box {
    background: rgba(168, 85, 247, 0.05);
}

.rules-box h3 {
    color: var(--accent-purple);
    margin-top: 0;
}

.rules-box ul {
    list-style: none;
    padding: 0;
}

.rules-box li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.rules-box li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-cyan);
    font-weight: bold;
}

.steps-list {
    counter-reset: steps;
    list-style: none;
    padding: 0;
}

.steps-list li {
    counter-increment: steps;
    position: relative;
    padding-left: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.steps-list li::before {
    content: counter(steps);
    position: absolute;
    left: 0;
    top: 0;
    width: 2rem;
    height: 2rem;
    background: var(--accent-cyan);
    color: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

.faq-accordion .faq-item {
    margin-bottom: var(--spacing-md);
    border-left: 3px solid var(--accent-cyan);
    background: rgba(255, 255, 255, 0.02);
}

.cta-section {
    text-align: center;
    background: linear-gradient(135deg, rgba(0, 255, 170, 0.05), rgba(168, 85, 247, 0.05));
    border-color: var(--accent-cyan);
}

.cta-section h2 {
    border: none;
    margin-top: 0;
}

@media (max-width: 768px) {
    .return-button {
        top: var(--spacing-sm);
        left: var(--spacing-sm);
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    .return-button span {
        display: none;
    }

    .container {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .tool-wrapper {
        padding: var(--spacing-lg);
    }

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

@media (max-width: 480px) {
    .return-button {
        padding: 0.5rem;
    }

    .tool-wrapper {
        padding: var(--spacing-md);
    }

    .input-container {
        padding: 0.85rem 1rem;
    }

    #password-input {
        font-size: 0.95rem;
    }

    .faq-section {
        padding: var(--spacing-md);
    }

    .faq-item {
        padding: var(--spacing-sm);
    }
}

/* ===================================
   Performance Optimizations
   =================================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}