:root {
    --primary: #C0392B;
    --primary-hover: #A93226;
    --secondary: #E74C3C;
    --bg-dark: #121214;
    --bg-surface: #1E1E22;
    --bg-card: #25252B;
    --text-main: #E2E8F0;
    --text-muted: #94A3B8;
    --accent: #E67E22;
    --border-color: #2D2D35;
    --success: #2ECC71;
    --error: #E74C3C;
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --container-width: 1200px;
    --transition-fast: 0.2s ease;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-main);
}

.logo-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.025em;
}

.logo-domain {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.nav-list {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    background: none;
    border: none;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--bg-card);
}

.chevron {
    width: 12px;
    height: 12px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

/* Dropdown */
.has-dropdown {
    position: relative;
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    display: none;
    z-index: 101;
    min-width: 500px;
}

.has-dropdown:hover .nav-dropdown {
    display: block;
}

.dropdown-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.dropdown-col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.dropdown-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
    transition: var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--bg-card);
    color: var(--secondary);
}

.dropdown-item.active {
    background-color: var(--primary);
    color: white;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-fast);
}

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

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: var(--bg-card);
    border-color: var(--text-muted);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

/* Language switcher */
.lang-switcher {
    position: relative;
}

.lang-current {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: none;
    flex-direction: column;
    min-width: 120px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.lang-switcher:hover .lang-dropdown {
    display: flex;
}

.lang-option {
    padding: 0.5rem 0.75rem;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

.lang-option:hover {
    background-color: var(--bg-card);
}

/* Mobile Nav */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001; /* Keep it above the overlay and drawer */
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background-color: var(--text-main);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu-btn.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.open span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Main layouts */
main {
    flex: 1;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    text-align: center;
    background: radial-gradient(circle at top, #2C1B1B 0%, var(--bg-dark) 100%);
    border-bottom: 1px solid var(--border-color);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
    color: var(--text-main);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Tools Grid */
.tools-section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-muted);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: linear-gradient(135deg, var(--bg-surface) 0%, rgba(30, 30, 34, 0.75) 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-decoration: none;
    color: var(--text-main);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    position: relative;
    overflow: hidden;
}

.tool-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 10%, rgba(192, 57, 43, 0.08) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.tool-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 12px 30px rgba(192, 57, 43, 0.18);
}

.tool-card:hover::after {
    opacity: 1;
}

.tool-icon {
    font-size: 2.25rem;
    margin-bottom: 0.25rem;
    display: inline-block;
    transition: transform 0.3s ease;
}

.tool-card:hover .tool-icon {
    transform: scale(1.1);
}

.tool-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    flex-grow: 1;
}

/* Tool Detail Layout */
.tool-container {
    max-width: 800px;
    margin: 3rem auto;
    padding: 0 1.5rem;
}

.tool-header {
    margin-bottom: 2rem;
}

.tool-header h1 {
    font-size: 2.25rem;
    margin-bottom: 0.5rem;
}

.tool-header p {
    color: var(--text-muted);
}

.tool-card-main {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.95rem;
}

.input-group {
    display: flex;
    gap: 0.75rem;
}

.form-control {
    flex-grow: 1;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-main);
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

.form-select {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-main);
    padding: 0.75rem 2rem 0.75rem 1rem;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
}

/* Results panel */
.results-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
}

.results-card h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.terminal-box {
    background-color: #0c0c0e;
    border: 1px solid #1a1a20;
    border-radius: 6px;
    padding: 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    white-space: pre-wrap;
    overflow-x: auto;
    color: #a8b2c1;
    line-height: 1.5;
}

.result-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.95rem;
}

.result-table th,
.result-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.result-table th {
    background-color: var(--bg-card);
    font-weight: 600;
}

.result-table tr:hover td {
    background-color: rgba(255,255,255,0.02);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 4px;
    text-transform: uppercase;
}

.badge-success { background-color: rgba(46, 204, 113, 0.2); color: #2ecc71; }
.badge-danger { background-color: rgba(231, 76, 60, 0.2); color: #e74c3c; }
.badge-warning { background-color: rgba(230, 126, 34, 0.2); color: #e67e22; }

/* Footer */
.site-footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.2rem;
}

.footer-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-related {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

.related-link svg {
    width: 16px;
    height: 16px;
}

.related-link:hover {
    color: var(--primary);
}

.footer-col-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-main);
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-feedback p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.footer-feedback a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-lang {
    display: flex;
    gap: 1rem;
}

.footer-lang a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-lang a.active {
    color: var(--primary);
    font-weight: 700;
}

.category-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 2.5rem 0 1.25rem 0;
    position: relative;
    padding-left: 1rem;
}

.category-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.2rem;
    background-color: var(--primary);
    border-radius: 2px;
}

/* Mobile navigation drawer base styles (hidden by default on desktop) */
.mobile-nav {
    display: none;
}
.mobile-nav-overlay {
    display: none;
}

/* Responsiveness */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-list, .header-actions .btn-outline {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

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

    /* Mobile Nav Drawer Styles */
    .mobile-nav {
        display: block;
        position: fixed;
        top: 0;
        right: -300px;
        width: 300px;
        height: 100vh;
        background-color: var(--bg-surface);
        border-left: 1px solid var(--border-color);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
        z-index: 1000;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        padding: 2rem 1.5rem;
    }

    .mobile-nav.open {
        right: 0;
    }

    .mobile-nav-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(4px);
        opacity: 0;
        pointer-events: none;
        z-index: 999;
        transition: opacity 0.3s ease;
    }

    .mobile-nav-overlay.open {
        opacity: 1;
        pointer-events: auto;
    }

    .mobile-nav-inner {
        display: flex;
        flex-direction: column;
        gap: 2rem;
    }

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

    .mobile-nav-label {
        font-size: 0.75rem;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        color: var(--primary);
        font-weight: 700;
        margin-bottom: 0.5rem;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 0.25rem;
    }

    .mobile-nav-item {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        color: var(--text-main);
        text-decoration: none;
        font-size: 0.95rem;
        padding: 0.6rem 0.8rem;
        border-radius: 6px;
        transition: var(--transition-fast);
    }

    .mobile-nav-item:hover {
        background-color: var(--bg-card);
        color: var(--secondary);
    }

    .mobile-lang {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-top: 1rem;
        border-top: 1px solid var(--border-color);
        padding-top: 1rem;
    }

    .mobile-lang a {
        color: var(--text-muted);
        text-decoration: none;
        font-size: 0.85rem;
        padding: 0.4rem 0.8rem;
        border: 1px solid var(--border-color);
        border-radius: 6px;
        transition: var(--transition-fast);
    }

    .mobile-lang a.active {
        color: white;
        background-color: var(--primary);
        border-color: var(--primary);
    }

    .mobile-lang a:hover:not(.active) {
        background-color: var(--bg-card);
        color: var(--text-main);
    }
}

/* Copy Button Styling */
.copy-btn {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.copy-btn:hover {
    color: var(--primary) !important;
    transform: scale(1.1);
}

.copy-btn:active {
    transform: scale(0.9);
}

.copyable-ip-container {
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.copyable-ip-container:hover {
    border-color: var(--primary) !important;
}