/* ========================================
   Steller - Header & Navigation Styles
   Professional Navigation Design
   ======================================== */

.header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    padding: 1rem 0;
}

.navbar-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: nowrap;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--secondary);
    font-weight: 700;
    font-size: 1.5rem;
    transition: all var(--duration-normal) var(--ease);
}

.logo:hover {
    color: var(--primary);
}

.logo svg {
    width: 40px;
    height: 40px;
    transition: transform var(--duration-normal) var(--ease);
}

.logo:hover svg {
    transform: rotate(10deg) scale(1.05);
}

.logo-text {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Navigation Links */
.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    margin: 0;
    padding: 0;
    flex: 1;
    justify-content: center;
}

.nav-links li {
    display: list-item;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--duration-normal) var(--ease);
    position: relative;
    padding-bottom: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    transition: width var(--duration-normal) var(--ease);
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Navigation Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: auto;
}

/* Auth Buttons */
.btn-login,
.btn-signup,
.btn-dashboard,
.btn-logout {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease);
    gap: 0.5rem;
}

.btn-login {
    color: var(--primary);
    background: transparent;
    border: 1.5px solid var(--primary);
}

.btn-login:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.btn-signup {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.2);
}

.btn-signup:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.3);
}

.btn-dashboard {
    background: var(--gray-900);
    color: var(--white);
    border: 1.5px solid var(--gray-900);
}

.btn-dashboard:hover {
    background: transparent;
    color: var(--gray-900);
    transform: translateY(-2px);
}

.btn-logout {
    color: var(--danger);
    background: transparent;
    border: 1.5px solid var(--danger);
}

.btn-logout:hover {
    background: var(--danger);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* Menu Toggle (Hidden by default) */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-700);
    cursor: pointer;
    transition: color var(--duration-normal) var(--ease);
}

.menu-toggle:hover {
    color: var(--primary);
}

/* Responsive Design */
@media (max-width: 992px) {
    .navbar-wrapper {
        gap: 1.5rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .nav-links a {
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .navbar-wrapper {
        flex-wrap: wrap;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        gap: 0;
        border-bottom: 1px solid var(--gray-200);
        width: 100%;
        padding: 0;
        margin: 0;
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        border-bottom: 1px solid var(--gray-200);
    }

    .nav-links a {
        display: block;
        padding: 1rem;
        border-bottom: none;
    }

    .nav-links a::after {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .nav-actions {
        gap: 0.5rem;
    }

    .logo-text {
        display: inline;
    }

    .btn-login,
    .btn-signup,
    .btn-dashboard,
    .btn-logout {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 576px) {
    .navbar-wrapper {
        gap: 1rem;
    }

    .logo {
        gap: 0.5rem;
        font-size: 1.25rem;
    }

    .logo svg {
        width: 32px;
        height: 32px;
    }

    .nav-links {
        width: calc(100% + 1rem);
        left: -0.5rem;
    }

    .nav-actions {
        gap: 0.25rem;
    }

    .btn-login,
    .btn-signup,
    .btn-dashboard,
    .btn-logout {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }
}