:root {
    --bg: #ffffff;
    --bg-secondary: #f8fafc;
    --text: #0f172a;
    --text-secondary: #475569;
    --border: #e2e8f0;
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --accent-light: #eef2ff;
    --surface: #ffffff;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
    --input-bg: #ffffff;
    --output-bg: #f1f5f9;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.2s ease;
}

[data-theme="dark"] {
    --bg: #0b1120;
    --bg-secondary: #1e293b;
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --accent: #818cf8;
    --accent-hover: #6366f1;
    --accent-light: #1e1b4b;
    --surface: #1e293b;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.2);
    --shadow-lg: 0 25px 50px -12px rgba(0,0,0,0.5);
    --input-bg: #1e293b;
    --output-bg: #0f172a;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
}

a {
    color: var(--accent);
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--surface);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 12px rgba(0,0,0,0.05);
    z-index: 1000;
    display: flex;
    justify-content: center;
    padding: 1rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}
.cookie-banner.show {
    transform: translateY(0);
}
.cookie-content {
    max-width: 1100px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}
.cookie-content p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.cookie-btns {
    display: flex;
    gap: 0.5rem;
}
.btn-cookie {
    padding: 0.5rem 1.2rem;
    border-radius: 30px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    transition: background 0.2s;
}
.btn-accept {
    background: var(--accent);
    color: #ffffff;
}
.btn-accept:hover {
    background: var(--accent-hover);
}
.btn-dismiss {
    background: var(--bg-secondary);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-dismiss:hover {
    background: var(--border);
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    z-index: 900;
    backdrop-filter: blur(8px);
    transition: background var(--transition);
}
.navbar {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 1rem;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text);
    text-decoration: none;
}
.logo-text {
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 0.5rem;
}
.nav-link, .nav-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.5rem 0.8rem;
    background: transparent;
    border: none;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.2s;
    text-decoration: none;
}
.nav-link:hover, .nav-dropdown-toggle:hover {
    background: var(--bg-secondary);
}
.dropdown-arrow {
    transition: transform 0.2s;
}
.nav-item {
    position: relative;
}
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    list-style: none;
    padding: 0.5rem 0;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(5px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    z-index: 50;
}
.nav-item.active .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.nav-dropdown li a {
    display: block;
    padding: 0.5rem 1.2rem;
    color: var(--text);
    font-size: 0.9rem;
    text-decoration: none;
    white-space: nowrap;
}
.nav-dropdown li a:hover {
    background: var(--bg-secondary);
    color: var(--accent);
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text);
}
.theme-toggle:hover {
    background: var(--bg-secondary);
}
.icon-sun, .icon-moon {
    transition: opacity 0.2s;
}
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: none; }

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}
.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.2s;
}
@media (max-width: 900px) {
    .nav-toggle {
        display: flex;
    }
    .nav-menu {
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: var(--bg);
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: 0.3s ease;
        box-shadow: var(--shadow-lg);
    }
    .nav-menu.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .nav-item {
        width: 100%;
    }
    .nav-dropdown {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 1.5rem;
        display: none;
    }
    .nav-item.active .nav-dropdown {
        display: block;
    }
}

/* Breadcrumb */
.breadcrumb {
    max-width: 1300px;
    margin: 1rem auto 0;
    padding: 0 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}
.breadcrumb li:not(:last-child)::after {
    content: "/";
    margin: 0 0.4rem;
    color: var(--text-secondary);
}
.breadcrumb a {
    color: var(--text-secondary);
}
.breadcrumb a:hover {
    color: var(--accent);
}
.breadcrumb [aria-current="page"] {
    color: var(--accent);
    font-weight: 500;
}

/* Hero */
.hero {
    max-width: 900px;
    margin: 2rem auto;
    text-align: center;
    padding: 0 1.5rem;
}
.hero-content h1 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}
.hero-badges {
    display: flex;
    gap: 0.8rem;
    justify-content: center;
    flex-wrap: wrap;
}
.badge {
    background: var(--accent-light);
    color: var(--accent);
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Converter Section */
.converter-section {
    max-width: 1300px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}
.converter-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
@media (max-width: 800px) {
    .converter-container {
        grid-template-columns: 1fr;
    }
}
.converter-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}
.panel-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}
.panel-actions {
    display: flex;
    gap: 0.5rem;
}
.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text);
    cursor: pointer;
    transition: background 0.2s;
    font-weight: 500;
}
.btn-sm:hover {
    background: var(--border);
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
}
.code-input {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    background: var(--input-bg);
    color: var(--text);
    resize: vertical;
    min-height: 280px;
    transition: border 0.2s;
}
.code-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
}
.validation-msg {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    min-height: 1.2rem;
    color: #dc2626;
}
.btn-convert {
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background 0.2s, opacity 0.2s;
    width: 100%;
}
.btn-convert:hover:not(:disabled) {
    background: var(--accent-hover);
}
.btn-convert:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}
.btn-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
.btn-convert.loading .btn-text { display: none; }
.btn-convert.loading .btn-spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.output-wrapper {
    background: var(--output-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    min-height: 280px;
    overflow: auto;
    flex: 1;
}
.code-output {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text);
}
.output-stats {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Random Tools */
.random-tools {
    max-width: 1300px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}
.random-tools h2, .features h2, .how-it-works h2, .faq h2, .cta h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
}
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.8rem;
}
.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.8rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    text-align: center;
    transition: all 0.2s;
    text-decoration: none;
}
.tool-card:hover {
    border-color: var(--accent);
    background: var(--accent-light);
    color: var(--accent);
}

/* Features */
.features {
    max-width: 1100px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}
.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    transition: box-shadow 0.2s;
}
.feature-card:hover {
    box-shadow: var(--shadow-lg);
}
.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* How it works */
.how-it-works {
    max-width: 900px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    text-align: center;
}
.step-number {
    width: 48px;
    height: 48px;
    background: var(--accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.3rem;
    margin: 0 auto 1rem;
}

/* SEO Content */
.seo-content {
    max-width: 900px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}
.seo-text p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

/* FAQ */
.faq {
    max-width: 800px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
}
.faq-item summary {
    padding: 1rem 1.5rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.faq-item summary::after {
    content: "▾";
    font-size: 1.2rem;
    transition: transform 0.2s;
}
.faq-item[open] summary::after {
    transform: rotate(180deg);
}
.faq-item p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
}

/* CTA */
.cta {
    text-align: center;
    margin: 4rem auto;
    padding: 3rem 1.5rem;
    background: var(--accent-light);
    border-radius: var(--radius);
    max-width: 800px;
}
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}
.btn-cta {
    padding: 0.8rem 2rem;
    border-radius: 40px;
    background: var(--accent);
    color: white;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s;
}
.btn-cta-secondary {
    background: var(--bg);
    color: var(--accent);
    border: 1px solid var(--accent);
}
.btn-cta-secondary:hover {
    background: var(--border);
}

/* Footer */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 3rem 1.5rem 1.5rem;
    margin-top: 4rem;
}
.footer-grid {
    max-width: 1300px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}
.footer-col h4 {
    font-weight: 600;
    margin-bottom: 1rem;
}
.footer-col ul {
    list-style: none;
}
.footer-col li {
    margin-bottom: 0.5rem;
}
.footer-col a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.footer-col a:hover {
    color: var(--accent);
}
.footer-bottom {
    max-width: 1300px;
    margin: 2rem auto 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
}
.footer-disclaimer {
    margin-top: 0.5rem;
    font-size: 0.75rem;
}