/* ==========================================================================
   1. Variables & Global Reset
   ========================================================================== */
:root {
    --primary: #0a2540;   /* Logistics Deep Blue */
    --accent: #00d4ff;    /* Action Cyan */
    --white: #ffffff;
    --gray-light: #f6f9fc;
    --text-main: #425466;
    --font-main: 'Segoe UI', Roboto, sans-serif;
    --transition: 0.3s ease-in-out;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-main);
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

#app-content {
    flex: 1;
}

/* ==========================================================================
   2. Header & Navigation (Desktop First)
   ========================================================================== */
.navbar {
    background: var(--primary);
    padding: 1rem 0;
    color: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo { 
    font-size: 1.5rem; 
    font-weight: bold; 
    text-decoration: none; 
    color: white; 
}

.logo span { color: var(--accent); }


.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    background: none;
    border: none;
    gap: 5px;
}

.menu-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: white;
    transition: var(--transition);
}

.nav-links { 
    list-style: none; 
    display: flex; 
    gap: 30px; 
}

.nav-links a { 
    color: white; 
    text-decoration: none; 
    transition: var(--transition);
    font-weight: 500;
    font-size: 1rem;
}

.nav-links a:hover, 
.nav-links a.active { 
    color: var(--accent); 
}

/* ==========================================================================
   3. Footer Structure
   ========================================================================== */
footer { 
    background: var(--gray-light); 
    padding: 30px 0; 
    text-align: center; 
    font-size: 0.9rem;
    border-top: 1px solid #ddd;
    margin-top: auto;
}

/* ==========================================================================
   4. Responsive Media Queries (Tablets & Mobiles)
   ========================================================================== */

@media (max-width: 992px) {
    .container { padding: 0 30px; }
}


@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-links {
        position: fixed;
        right: -100%;
        top: 0;
        flex-direction: column;
        background: var(--primary);
        width: 260px;
        height: 100vh;
        justify-content: flex-start;
        padding-top: 100px;
        transition: 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
        box-shadow: -5px 0 15px rgba(0,0,0,0.3);
        z-index: 999;
    }

    
    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        margin: 15px 0;
        text-align: center;
    }

    .nav-links a {
        font-size: 1.2rem;
    }

    
    .menu-toggle.is-active .bar:nth-child(2) { opacity: 0; }
    .menu-toggle.is-active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .menu-toggle.is-active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
}


@media (max-width: 480px) {
    .logo { font-size: 1.3rem; }
    .nav-links { width: 100%; }
}