/**
 * Header & Navigation Styles
 * Dynamic Developer
 */

/* ============================================
   HEADER
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.98);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    max-width: var(--container-2xl);
    margin: 0 auto;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: var(--font-extrabold);
    color: var(--dark-900);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--text-xl);
    object-fit: contain;
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text .brand-name {
    font-size: var(--text-xl);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text .brand-tagline {
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    color: var(--dark-700);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--gray-100);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
}

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

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-toggle i {
    font-size: var(--text-sm);
    transition: transform var(--transition-fast);
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 250px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-3);
    margin-top: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
}

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

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--dark-700);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--gray-100);
    color: var(--primary-color);
    transform: translateX(5px);
}

.dropdown-item i {
    font-size: var(--text-lg);
    width: 24px;
    text-align: center;
}

.dropdown-item-title {
    font-weight: var(--font-semibold);
    font-size: var(--text-sm);
}

.dropdown-item-desc {
    font-size: var(--text-xs);
    color: var(--gray-500);
    margin-top: 2px;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.btn-login {
    padding: var(--space-2) var(--space-5);
    font-size: var(--text-sm);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
    border-radius: var(--radius-lg);
    font-weight: var(--font-semibold);
    transition: all var(--transition-fast);
}

.btn-login:hover {
    background: var(--primary-color);
    color: var(--white);
}

.btn-get-started {
    padding: var(--space-2) var(--space-5);
    font-size: var(--text-sm);
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: var(--font-semibold);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.btn-get-started:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-900);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================
   RESPONSIVE NAVIGATION
   ============================================ */
@media (max-width: 1024px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--white);
        box-shadow: var(--shadow-xl);
        padding: var(--space-6);
        gap: var(--space-1);
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        width: 100%;
        justify-content: space-between;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        margin-top: var(--space-2);
        margin-left: var(--space-4);
        display: none;
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .header-actions {
        margin-left: auto;
        margin-right: var(--space-4);
    }
}

@media (max-width: 768px) {
    .logo-text .brand-name {
        font-size: var(--text-lg);
    }

    .logo-text .brand-tagline {
        display: none;
    }

    .btn-login,
    .btn-get-started {
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }
}