:root {
    /* Coffee Color Palette */
    --espresso: #3E2723;
    --dark-roast: #4E342E;
    --medium-roast: #6D4C41;
    --latte: #8D6E63;
    --cream: #EFEBE9;
    --foam: #F5F5F5;
    --white: #FFFFFF;
    
    /* Accent Colors */
    --coffee-gold: #D4AF37;
    --coffee-amber: #C9A050;
    
    /* Text Colors */
    --text-primary: #2C2C2C;
    --text-secondary: #5D4E37;
    --text-light: #8B7355;
    --border-light: #E0D5C7;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation Bar */
.tool-nav {
    background: linear-gradient(135deg, var(--espresso) 0%, var(--dark-roast) 100%);
    border-bottom: 3px solid var(--coffee-gold);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 1000;
}

.nav-container {
    max-width: 100%;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 2rem;
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--white);
    font-weight: 700;
    font-size: 1.125rem;
    transition: opacity 0.3s ease;
    flex-shrink: 0;
    z-index: 1001;
}

.nav-logo:hover {
    opacity: 0.85;
}

.nav-coffee {
    font-size: 1.5rem;
}

.nav-brand {
    white-space: nowrap;
}

/* Mobile Menu Toggle Button */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.nav-toggle span {
    width: 28px;
    height: 3px;
    background: var(--white);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(9px, 9px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 0.5rem;
    flex: 1;
    justify-content: center;
    align-items: center;
}

.nav-link {
    padding: 0.5rem 0.875rem;
    color: var(--cream);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    white-space: nowrap;
    position: relative;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.nav-link.active {
    background: var(--coffee-gold);
    color: var(--espresso);
    font-weight: 600;
}

/* Dropdown Menu */
.nav-dropdown {
    cursor: pointer;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    margin-top: 0.5rem;
    z-index: 1000;
    overflow: hidden;
}

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

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--espresso);
    text-decoration: none;
    font-weight: 500;
    transition: background 0.2s ease;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background: var(--cream);
}

.dropdown-menu a.active {
    background: var(--coffee-gold);
    color: var(--espresso);
    font-weight: 600;
}

/* Home Button */
.nav-home {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.nav-home:hover {
    background: var(--coffee-gold);
    color: var(--espresso);
}

.nav-home svg {
    width: 18px;
    height: 18px;
}

/* Tool Container */
.tool-container {
    flex: 1;
    width: 100%;
    height: calc(100vh - 64px);
    overflow: hidden;
}

.tool-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

/* Buy Me a Coffee Footer - Bottom Right Corner */
.bmc-footer {
    position: fixed !important;
    bottom: 20px !important;
    right: 20px !important;
    left: auto !important;
    width: auto !important;
    height: auto !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    z-index: 999;
}

.bmc-footer > div {
    transform: scale(0.7);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-links {
        gap: 0.25rem;
    }
    
    .nav-link {
        padding: 0.4rem 0.65rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    /* Show hamburger menu */
    .nav-toggle {
        display: flex;
    }
    
    /* Hide home button on mobile */
    .nav-home {
        display: none;
    }
    
    /* Mobile menu dropdown */
    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, var(--espresso) 0%, var(--dark-roast) 100%);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s ease;
        pointer-events: none;
        border-bottom: 3px solid var(--coffee-gold);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-link {
        width: 100%;
        padding: 1rem 2rem;
        border-radius: 0;
        font-size: 1rem;
        text-align: left;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-link:hover {
        background: rgba(255, 255, 255, 0.15);
    }
    
    .nav-link.active {
        background: var(--coffee-gold);
        color: var(--espresso);
    }
    
    .tool-container {
        height: calc(100vh - 64px);
    }
}

@media (max-width: 480px) {
    .nav-container {
        height: 56px;
    }
    
    .nav-coffee {
        font-size: 1.25rem;
    }
    
    .nav-links {
        top: 56px;
    }
    
    .tool-container {
        height: calc(100vh - 56px);
    }
    
    .bmc-footer {
        bottom: 10px !important;
        right: 10px !important;
    }
    
    .bmc-footer > div {
        transform: scale(0.6);
    }
}