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

:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111111;
    --text-primary: #e0e0e0;
    --text-secondary: #808080;
    --accent-primary: #00b359;
    --accent-secondary: #009447;
    --accent-hover: #00cc66;
    --accent-glow: rgba(0, 179, 89, 0.2);
    --border-color: #1a1a1a;
    --success: #00b359;
    --warning: #ffaa00;
    --error: #ff3333;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--accent-primary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 0 20px var(--accent-glow);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-box {
    background: var(--bg-primary);
    border: 2px solid var(--accent-primary);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 0.1rem;
    font-family: 'Arial', sans-serif;
    font-weight: 900;
    font-size: 1.4rem;
    box-shadow: 0 0 10px var(--accent-glow);
}

.logo-n {
    color: var(--text-primary);
}

.logo-1 {
    color: var(--accent-primary);
}

.logo-text {
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.logo-icon {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 0.75rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    list-style: none;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
    margin-top: 0.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid var(--border-color);
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.dropdown-menu a:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Main Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
}

/* Pages */
.page {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.page.active {
    display: block;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 0 3rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px var(--accent-glow), 0 0 20px var(--accent-glow);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
    text-shadow: 0 0 10px var(--accent-glow);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Info Section */
.info-section {
    margin: 4rem 0;
    padding: 3rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.info-section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.info-points {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.info-point {
    display: flex;
    gap: 1rem;
}

.check-icon {
    color: var(--success);
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
}

.info-point strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.info-point p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Page Title */
.page-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Tool Container */
.tool-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 2rem;
}

/* Input/Output Sections */
.input-section,
.output-section {
    margin-bottom: 1.5rem;
}

.input-section label,
.output-section label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

textarea {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    resize: vertical;
    transition: border-color 0.3s;
}

textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* Controls */
.controls {
    display: flex;
    gap: 1rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--accent-primary);
    color: #000000;
    font-weight: 700;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px var(--accent-glow), 0 0 15px var(--accent-glow);
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

/* Date Inputs */
.date-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.date-input {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
}

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

/* Result Box */
.result-box {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    margin-top: 1.5rem;
    text-align: center;
}

.result-box p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.result-box .result-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin: 1rem 0;
}

.result-box .result-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.result-detail {
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.result-detail-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.result-detail-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Fullscreen Modal */
.fullscreen-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    z-index: 10000;
    flex-direction: column;
}

.fullscreen-modal.active {
    display: flex;
}

.fullscreen-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.fullscreen-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.fullscreen-title i {
    color: var(--accent-primary);
}

.fullscreen-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.fullscreen-search {
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.95rem;
    width: 250px;
    transition: border-color 0.3s;
}

.fullscreen-search:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-glow);
}

.btn-icon {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.btn-icon:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-glow);
}

.search-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
    min-width: 60px;
    text-align: center;
}

.fullscreen-content {
    flex: 1;
    overflow: auto;
    padding: 2rem;
}

.fullscreen-content pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    color: var(--text-primary);
    font-family: 'Courier New', Consolas, Monaco, monospace;
    font-size: 1rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
}

.fullscreen-content pre mark {
    background: var(--accent-primary);
    color: #000000;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 700;
}

.fullscreen-content pre mark.current {
    background: var(--accent-hover);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 1rem;
    }
    
    .nav-menu {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-item {
        width: 100%;
    }
    
    .nav-link {
        width: 100%;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        margin-top: 0;
        display: none;
    }
    
    .dropdown:hover .dropdown-menu {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .info-points {
        grid-template-columns: 1fr;
    }
}