:root {
    --color-bg: #FAFAF8;
    --color-surface: #FFFFFF;
    --color-primary: #0A6E7C;
    --color-primary-light: #0F8A9D;
    --color-accent: #FF6B4A;
    --color-accent-hover: #FF5533;
    --color-text: #1A1A1A;
    --color-text-muted: #5A5A5A;
    --color-border: #E5E5E0;
    --color-sage: #8BA888;
    --color-success: #10b981;

    --font-display: 'Fraunces', serif;
    --font-body: 'Manrope', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    font-size: 16px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header Styles */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem 2rem;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 40px;
    width: auto;
    transition: var(--transition-smooth);
}

.logo img:hover {
    transform: scale(1.05);
}

nav ul {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition-smooth);
}

nav a:not(.button-1):hover {
    color: var(--color-primary);
}

nav a:not(.button-1)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-smooth);
}

nav a:not(.button-1):hover::after {
    width: 100%;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    cursor: pointer;
}

.dropdown-toggle::after {
    content: '▼';
    font-size: 0.7rem;
    transition: var(--transition-smooth);
}

.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 0.5rem 0;
    min-width: 240px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

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

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu li:not(:last-child) {
    border-bottom: 1px solid var(--color-border);
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition-smooth);
    font-size: 0.95rem;
}

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

.dropdown-menu a::after {
    display: none;
}

.menu-toggle {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--color-text);
}

.button-1 {
    display: inline-block;
    padding: 0.85rem 2rem;
    background: var(--color-accent);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 107, 74, 0.3);
}

.button-1:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 107, 74, 0.4);
}

/* Main Content */
main {
    padding: var(--spacing-lg) 0;
    min-height: calc(100vh - 300px);
}

.hero-section {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.hero-section h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.hero-section .highlight {
    color: var(--color-primary);
}

.hero-section p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* Generator Tool */
.generator-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--color-surface);
    border-radius: 24px;
    padding: var(--spacing-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    font-size: 1rem;
}

.form-group small {
    display: block;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-smooth);
    background: var(--color-bg);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(10, 110, 124, 0.1);
}

.button-primary {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(10, 110, 124, 0.3);
    margin-top: var(--spacing-sm);
}

.button-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(10, 110, 124, 0.4);
}

/* Result Section */
.result-section {
    margin-top: var(--spacing-md);
    display: none;
}

.result-section.active {
    display: block;
}

.result-box {
    background: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.result-box h3 {
    font-family: var(--font-display);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.boolean-string {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.8;
    word-break: break-word;
    border: 1px solid var(--color-border);
}

.copy-button {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1.5rem;
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.copy-button:hover {
    background: var(--color-accent-hover);
}

.copy-button.copied {
    background: var(--color-success);
}

.tips-section {
    background: rgba(10, 110, 124, 0.05);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.tips-section h4 {
    font-family: var(--font-display);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.tips-section ul {
    list-style: none;
    padding-left: 0;
}

.tips-section li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--color-text-muted);
}

.tips-section li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.tips-section code {
    background: var(--color-surface);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    border: 1px solid var(--color-border);
    color: var(--color-primary);
}

/* Footer */
.footer {
    background: var(--color-text);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-lg) 2rem var(--spacing-md);
    text-align: center;
    margin-top: var(--spacing-xl);
}

.footer p {
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.footer a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-smooth);
    margin: 0 0.5rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    header {
        padding: 1rem 1.5rem;
    }

    nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--color-surface);
        transition: var(--transition-smooth);
        z-index: 999;
        padding: 2rem;
    }

    nav.active {
        left: 0;
    }

    nav ul {
        flex-direction: column;
        gap: 2rem;
        align-items: flex-start;
    }

    .menu-toggle {
        display: block;
    }

    /* Mobile dropdown */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        box-shadow: none;
        border: none;
        padding-left: 1rem;
        margin-top: 0.5rem;
        display: none;
    }

    .dropdown.active .dropdown-menu {
        display: block;
    }

    .dropdown-toggle::after {
        content: '▼';
    }

    .dropdown.active .dropdown-toggle::after {
        transform: rotate(180deg);
    }

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

    .copy-button {
        position: static;
        width: 100%;
        margin-top: var(--spacing-sm);
    }
}