/* TC304 Common Styles */
/* Global Reset & Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1a365d;
    --primary-light: #2c5282;
    --secondary: #c53030;
    --secondary-dark: #9b2c2c;
    --accent: #ed8936;
    --text: #2d3748;
    --text-light: #718096;
    --text-muted: #6b7280;
    --bg: #ffffff;
    --bg-alt: #f7fafc;
    --bg-warm: #faf9f6;
    --border: #e2e8f0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
}

/* Header */
header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-issmge {
    display: flex;
    align-items: center;
}

.logo-issmge img {
    height: 65px;
    width: auto;
    object-fit: contain;
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.logo-text h1 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    line-height: 1.3;
}

.logo-text span {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Navigation */
nav ul {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
    position: relative;
}

nav a:hover {
    color: var(--secondary);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: width 0.3s;
}

nav a:hover::after {
    width: 100%;
}

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

.dropdown > a {
    padding-bottom: 1.5rem;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg);
    min-width: 220px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    border-radius: 8px;
    padding: 0.5rem 0;
    z-index: 1001;
}

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

.dropdown-content a {
    display: block;
    padding: 0.7rem 1.5rem;
    color: var(--text);
    font-size: 0.9rem;
    transition: all 0.2s;
    position: relative;
}

.dropdown-content a:hover {
    background: var(--bg-alt);
    color: var(--secondary);
}

.dropdown-content a::after {
    content: '';
    position: absolute;
    bottom: 0.3rem;
    left: 1.5rem;
    right: 1.5rem;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: width 0.3s;
}

.dropdown-content a:hover::after {
    width: calc(100% - 3rem);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    flex-direction: column;
    gap: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary);
    transition: all 0.3s;
}

/* Footer */
footer {
    background: var(--primary);
    color: white;
    padding: 4rem 2rem 1.5rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h5 {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    color: white;
}

.footer-section a {
    display: block;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    padding: 0.4rem 0;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    nav ul {
        gap: 1.5rem;
    }
}

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

    nav {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    nav.active {
        max-height: calc(100vh - 80px);
        overflow-y: auto;
    }

    nav ul {
        flex-direction: column;
        gap: 0;
        padding: 1rem 2rem;
    }

    nav li {
        border-bottom: 1px solid var(--border);
    }

    nav li:last-child {
        border-bottom: none;
    }

    nav a {
        display: block;
        padding: 1rem 0;
    }

    nav a::after {
        display: none;
    }

    .dropdown > a {
        padding-bottom: 1rem;
    }

    .dropdown-content {
        position: static;
        display: none;
        box-shadow: none;
        padding-left: 1rem;
    }

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

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .header-container {
        padding: 0 1rem;
    }
}