/**
 * FTSI Tools - Simple Header and Navigation
 * Clean, simple menu system built from scratch
 */

/* Reset */
* {
    box-sizing: border-box;
}

/* Header Container */
.main-header {
    background: #1a1a1a;
    border-bottom: 1px solid #333;
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* Brand Section */
.header-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    min-height: 60px;
}

.brand-logo {
    height: 40px;
    width: auto;
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Navigation */
.main-nav {
    background: #2c3e50;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    color: #ecf0f1;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.2s;
}

.nav-link:hover,
.nav-link.active {
    background: #34495e;
    color: #fff;
    text-decoration: none;
}

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

.dropdown > .nav-link::after {
    content: '▼';
    font-size: 0.75rem;
    margin-left: 0.5rem;
    transition: transform 0.2s;
}

.dropdown:hover > .nav-link::after {
    transform: rotate(180deg);
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #34495e;
    border: 1px solid #2c3e50;
    z-index: 1000;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: #ecf0f1;
    text-decoration: none;
    transition: background-color 0.2s;
}

.dropdown-item:hover {
    background: #2c3e50;
    color: #fff;
    text-decoration: none;
}

.dropdown-divider {
    height: 1px;
    background: #2c3e50;
    margin: 0.25rem 0;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }
    
    .brand-logo {
        height: 35px;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #2c3e50;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-item {
        width: 100%;
        border-bottom: 1px solid #34495e;
    }
    
    .nav-link {
        padding: 1rem 1.5rem;
    }
    
    /* Mobile Dropdown */
    .dropdown-content {
        position: static;
        display: none;
        background: #34495e;
        border: none;
        min-width: auto;
    }
    
    .dropdown.active .dropdown-content {
        display: block;
    }
    
    .dropdown.active > .nav-link::after {
        transform: rotate(180deg);
    }
    
    .dropdown-item {
        padding: 0.75rem 2.5rem;
        border-bottom: 1px solid #2c3e50;
    }
}